189abb9f8SPhilip Paeps# tzdb data for North and Central America and environs 289abb9f8SPhilip Paeps 31315084cSEdwin Groothuis# This file is in the public domain, so clarified as of 41315084cSEdwin Groothuis# 2009-05-17 by Arthur David Olson. 51315084cSEdwin Groothuis 61315084cSEdwin Groothuis# also includes Central America and the Caribbean 71315084cSEdwin Groothuis 87ce0f064SEdwin Groothuis# This file is by no means authoritative; if you think you know better, 91315084cSEdwin Groothuis# go ahead and edit the file (and please send any changes to 107ce0f064SEdwin Groothuis# tz@iana.org for general use in the future). For more, please see 117ce0f064SEdwin Groothuis# the file CONTRIBUTING in the tz distribution. 121315084cSEdwin Groothuis 131315084cSEdwin Groothuis# From Paul Eggert (1999-03-22): 141315084cSEdwin Groothuis# A reliable and entertaining source about time zones is 151315084cSEdwin Groothuis# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 161315084cSEdwin Groothuis 171315084cSEdwin Groothuis############################################################################### 181315084cSEdwin Groothuis 191315084cSEdwin Groothuis# United States 201315084cSEdwin Groothuis 211315084cSEdwin Groothuis# From Paul Eggert (1999-03-31): 221315084cSEdwin Groothuis# Howse writes (pp 121-125) that time zones were invented by 231315084cSEdwin Groothuis# Professor Charles Ferdinand Dowd (1825-1904), 241315084cSEdwin Groothuis# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 25c26a5802SEdwin Groothuis# His pamphlet "A System of National Time for Railroads" (1870) 261315084cSEdwin Groothuis# was the result of his proposals at the Convention of Railroad Trunk Lines 271315084cSEdwin Groothuis# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 281315084cSEdwin Groothuis# but in 1872-05 he moved the proposed origin to Greenwich. 2936d97c26SBaptiste Daroussin 3046bee4edSPhilip Paeps# From Paul Eggert (2018-03-20): 3136d97c26SBaptiste Daroussin# Dowd's proposal left many details unresolved, such as where to draw 3236d97c26SBaptiste Daroussin# lines between time zones. The key individual who made time zones 3336d97c26SBaptiste Daroussin# work in the US was William Frederick Allen - railway engineer, 3436d97c26SBaptiste Daroussin# managing editor of the Travelers' Guide, and secretary of the 3536d97c26SBaptiste Daroussin# General Time Convention, a railway standardization group. Allen 3636d97c26SBaptiste Daroussin# spent months in dialogs with scientific and railway leaders, 3736d97c26SBaptiste Daroussin# developed a workable plan to institute time zones, and presented it 3836d97c26SBaptiste Daroussin# to the General Time Convention on 1883-04-11, saying that his plan 3936d97c26SBaptiste Daroussin# meant "local time would be practically abolished" - a plus for 4036d97c26SBaptiste Daroussin# railway scheduling. By the next convention on 1883-10-11 nearly all 4146bee4edSPhilip Paeps# railroads had agreed and it took effect on 1883-11-18. That Sunday 4246bee4edSPhilip Paeps# was called the "day of two noons", as some locations observed noon 4346bee4edSPhilip Paeps# twice. Allen witnessed the transition in New York City, writing: 4436d97c26SBaptiste Daroussin# 4536d97c26SBaptiste Daroussin# I heard the bells of St. Paul's strike on the old time. Four 4636d97c26SBaptiste Daroussin# minutes later, obedient to the electrical signal from the Naval 4736d97c26SBaptiste Daroussin# Observatory ... the time-ball made its rapid descent, the chimes 4836d97c26SBaptiste Daroussin# of old Trinity rang twelve measured strokes, and local time was 4936d97c26SBaptiste Daroussin# abandoned, probably forever. 5036d97c26SBaptiste Daroussin# 5136d97c26SBaptiste Daroussin# Most of the US soon followed suit. See: 5236d97c26SBaptiste Daroussin# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 5389abb9f8SPhilip Paeps# https://dx.doi.org/10.2307/3105430 541315084cSEdwin Groothuis 551315084cSEdwin Groothuis# From Paul Eggert (2005-04-16): 561315084cSEdwin Groothuis# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 571315084cSEdwin Groothuis# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 581315084cSEdwin Groothuis 591315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 601315084cSEdwin Groothuis# A good source for time zone historical data in the US is 611315084cSEdwin Groothuis# Thomas G. Shanks, The American Atlas (5th edition), 621315084cSEdwin Groothuis# San Diego: ACS Publications, Inc. (1991). 631315084cSEdwin Groothuis# Make sure you have the errata sheet; the book is somewhat useless without it. 641315084cSEdwin Groothuis# It is the source for most of the pre-1991 US entries below. 651315084cSEdwin Groothuis 661315084cSEdwin Groothuis# From Paul Eggert (2001-03-06): 671315084cSEdwin Groothuis# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 68c26a5802SEdwin Groothuis# in his whimsical essay "An Economical Project for Diminishing the Cost 69c26a5802SEdwin Groothuis# of Light" published in the Journal de Paris (1784-04-26). 701315084cSEdwin Groothuis# Not everyone is happy with the results: 711315084cSEdwin Groothuis# 721315084cSEdwin Groothuis# I don't really care how time is reckoned so long as there is some 731315084cSEdwin Groothuis# agreement about it, but I object to being told that I am saving 741315084cSEdwin Groothuis# daylight when my reason tells me that I am doing nothing of the kind. 751315084cSEdwin Groothuis# I even object to the implication that I am wasting something 761315084cSEdwin Groothuis# valuable if I stay in bed after the sun has risen. As an admirer 771315084cSEdwin Groothuis# of moonlight I resent the bossy insistence of those who want to 781315084cSEdwin Groothuis# reduce my time for enjoying it. At the back of the Daylight Saving 791315084cSEdwin Groothuis# scheme I detect the bony, blue-fingered hand of Puritanism, eager 801315084cSEdwin Groothuis# to push people into bed earlier, and get them up earlier, to make 811315084cSEdwin Groothuis# them healthy, wealthy and wise in spite of themselves. 821315084cSEdwin Groothuis# 831315084cSEdwin Groothuis# -- Robertson Davies, The diary of Samuel Marchbanks, 841315084cSEdwin Groothuis# Clarke, Irwin (1947), XIX, Sunday 851315084cSEdwin Groothuis# 861315084cSEdwin Groothuis# For more about the first ten years of DST in the United States, see 87eb1c1a05SSergey Kandaurov# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 887ce0f064SEdwin Groothuis# (Carnegie Library of Pittsburgh, 1927). 89dd5f96c4SPhilip Paeps# https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html 901315084cSEdwin Groothuis# 911315084cSEdwin Groothuis# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 921315084cSEdwin Groothuis# However, DST was imposed by the Standard Time Act of 1918, which 931315084cSEdwin Groothuis# was the first nationwide legal time standard, and apparently 941315084cSEdwin Groothuis# time was just called "Standard Time" or "Daylight Saving Time". 951315084cSEdwin Groothuis 962865ab3fSPhilip Paeps# From Paul Eggert (2019-06-04): 972865ab3fSPhilip Paeps# Here is the legal basis for the US federal rules. 982865ab3fSPhilip Paeps# * Public Law 65-106 (1918-03-19) implemented standard and daylight saving 992865ab3fSPhilip Paeps# time for the first time across the US, springing forward on March's last 1002865ab3fSPhilip Paeps# Sunday and falling back on October's last Sunday. 1012865ab3fSPhilip Paeps# https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf 1022865ab3fSPhilip Paeps# * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. 1032865ab3fSPhilip Paeps# https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf 1042865ab3fSPhilip Paeps# * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. 1052865ab3fSPhilip Paeps# https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf 1062865ab3fSPhilip Paeps# * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. 1072865ab3fSPhilip Paeps# https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf 1082865ab3fSPhilip Paeps# * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, 1092865ab3fSPhilip Paeps# from April's last Sunday to October's last Sunday, effective 1967. 1102865ab3fSPhilip Paeps# https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf 1112865ab3fSPhilip Paeps# * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. 1122865ab3fSPhilip Paeps# https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf 1132865ab3fSPhilip Paeps# * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to 1142865ab3fSPhilip Paeps# February's last Sunday. 1152865ab3fSPhilip Paeps# https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf 1162865ab3fSPhilip Paeps# * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first 1172865ab3fSPhilip Paeps# Sunday. 1182865ab3fSPhilip Paeps# https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf 1192865ab3fSPhilip Paeps# * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward 1202865ab3fSPhilip Paeps# to March's second Sunday and the fall-back to November's first Sunday. 1212865ab3fSPhilip Paeps# https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf 1222865ab3fSPhilip Paeps# All transitions are at 02:00 local time. 1231315084cSEdwin Groothuis 1241315084cSEdwin Groothuis# From Arthur David Olson: 1251315084cSEdwin Groothuis# Before the Uniform Time Act of 1966 took effect in 1967, observance of 1261315084cSEdwin Groothuis# Daylight Saving Time in the US was by local option, except during wartime. 1271315084cSEdwin Groothuis 1281315084cSEdwin Groothuis# From Arthur David Olson (2000-09-25): 1291315084cSEdwin Groothuis# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 1301315084cSEdwin Groothuis# In the introduction, Oboler spoke of "Eastern Peace Time." 1317ce0f064SEdwin Groothuis# An AltaVista search turned up: 1328d7edd17SPhilip Paeps# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html 1331315084cSEdwin Groothuis# "When the time is announced over the radio now, it is 'Eastern Peace 1341315084cSEdwin Groothuis# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 135eb1c1a05SSergey Kandaurov# (August 1945) by way of confirmation. 1368d7edd17SPhilip Paeps# 1378d7edd17SPhilip Paeps# From Paul Eggert (2017-09-23): 1388d7edd17SPhilip Paeps# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. 1391315084cSEdwin Groothuis 1401315084cSEdwin Groothuis# From Joseph Gallant citing 1411315084cSEdwin Groothuis# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 1421315084cSEdwin Groothuis# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 1431315084cSEdwin Groothuis# to switch to London for Attlee's address, but the American people 1441315084cSEdwin Groothuis# never got to hear his speech live. According to one press account, 1451315084cSEdwin Groothuis# CBS' Bob Trout was first to announce the word of Japan's surrender, 1461315084cSEdwin Groothuis# but a few seconds later, NBC, ABC and Mutual also flashed the word 1471315084cSEdwin Groothuis# of surrender, all of whom interrupting the bells of Big Ben in 1481315084cSEdwin Groothuis# London which were to precede Mr. Attlee's speech. 1491315084cSEdwin Groothuis 1501315084cSEdwin Groothuis# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 1511315084cSEdwin Groothuis# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 1521315084cSEdwin Groothuis# 1531315084cSEdwin Groothuis# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 1541315084cSEdwin Groothuis# Any announcement from Asia would reach St. John's New York newsroom on a 1551315084cSEdwin Groothuis# wire service teletype machine, which had prescribed signals for major news. 1561315084cSEdwin Groothuis# Associated Press, for example, would ring five bells before spewing out 1571315084cSEdwin Groothuis# typed copy of an important story, and 10 bells for news "of transcendental 1581315084cSEdwin Groothuis# importance." 1591315084cSEdwin Groothuis# 1601315084cSEdwin Groothuis# On Aug. 14, stalling while talking steadily into the NBC networks' open 1611315084cSEdwin Groothuis# microphone, St. John heard five bells and waited only to hear a sixth bell, 1621315084cSEdwin Groothuis# before announcing confidently: "Ladies and gentlemen, World War II is over. 1631315084cSEdwin Groothuis# The Japanese have agreed to our surrender terms." 1641315084cSEdwin Groothuis# 1651315084cSEdwin Groothuis# He had scored a 20-second scoop on other broadcasters. 1661315084cSEdwin Groothuis 1671315084cSEdwin Groothuis# From Arthur David Olson (2005-08-22): 1681315084cSEdwin Groothuis# Paul has been careful to use the "US" rules only in those locations 1691315084cSEdwin Groothuis# that are part of the United States; this reflects the real scope of 1701315084cSEdwin Groothuis# U.S. government action. So even though the "US" rules have changed 1711315084cSEdwin Groothuis# in the latest release, other countries won't be affected. 1721315084cSEdwin Groothuis 17312a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1741315084cSEdwin GroothuisRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1751315084cSEdwin GroothuisRule US 1918 1919 - Oct lastSun 2:00 0 S 1761315084cSEdwin GroothuisRule US 1942 only - Feb 9 2:00 1:00 W # War 1771315084cSEdwin GroothuisRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1782865ab3fSPhilip PaepsRule US 1945 only - Sep 30 2:00 0 S 1791315084cSEdwin GroothuisRule US 1967 2006 - Oct lastSun 2:00 0 S 1801315084cSEdwin GroothuisRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1811315084cSEdwin GroothuisRule US 1974 only - Jan 6 2:00 1:00 D 1822865ab3fSPhilip PaepsRule US 1975 only - Feb lastSun 2:00 1:00 D 1831315084cSEdwin GroothuisRule US 1976 1986 - Apr lastSun 2:00 1:00 D 1841315084cSEdwin GroothuisRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 1851315084cSEdwin GroothuisRule US 2007 max - Mar Sun>=8 2:00 1:00 D 1861315084cSEdwin GroothuisRule US 2007 max - Nov Sun>=1 2:00 0 S 1871315084cSEdwin Groothuis 1881315084cSEdwin Groothuis# From Arthur David Olson, 2005-12-19 1891315084cSEdwin Groothuis# We generate the files specified below to guard against old files with 1901315084cSEdwin Groothuis# obsolete information being left in the time zone binary directory. 1911315084cSEdwin Groothuis# We limit the list to names that have appeared in previous versions of 1921315084cSEdwin Groothuis# this time zone package. 1931315084cSEdwin Groothuis# We do these as separate Zones rather than as Links to avoid problems if 1941315084cSEdwin Groothuis# a particular place changes whether it observes DST. 1951315084cSEdwin Groothuis# We put these specifications here in the northamerica file both to 1961315084cSEdwin Groothuis# increase the chances that they'll actually get compiled and to 1971315084cSEdwin Groothuis# avoid the need to duplicate the US rules in another file. 1981315084cSEdwin Groothuis 1992865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 2001315084cSEdwin GroothuisZone EST -5:00 - EST 2011315084cSEdwin GroothuisZone MST -7:00 - MST 2021315084cSEdwin GroothuisZone HST -10:00 - HST 2031315084cSEdwin GroothuisZone EST5EDT -5:00 US E%sT 2041315084cSEdwin GroothuisZone CST6CDT -6:00 US C%sT 2051315084cSEdwin GroothuisZone MST7MDT -7:00 US M%sT 2061315084cSEdwin GroothuisZone PST8PDT -8:00 US P%sT 2071315084cSEdwin Groothuis 2081315084cSEdwin Groothuis# From U. S. Naval Observatory (1989-01-19): 2091315084cSEdwin Groothuis# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 2101315084cSEdwin Groothuis# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 2111315084cSEdwin Groothuis# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 2121315084cSEdwin Groothuis# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 2131315084cSEdwin Groothuis# USA MOUNTAIN 7 H BEHIND UTC DENVER 2141315084cSEdwin Groothuis# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 2151315084cSEdwin Groothuis# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 2161315084cSEdwin Groothuis# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 2171315084cSEdwin Groothuis# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 2181315084cSEdwin Groothuis# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 2191315084cSEdwin Groothuis# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 220eb1c1a05SSergey Kandaurov# USA " 9 H BEHIND UTC APR 3 - OCT 30 2211315084cSEdwin Groothuis# USA HAWAII 10 H BEHIND UTC 2221315084cSEdwin Groothuis# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 2231315084cSEdwin Groothuis 2241315084cSEdwin Groothuis# From Arthur David Olson (1989-01-21): 2251315084cSEdwin Groothuis# The above dates are for 1988. 2261315084cSEdwin Groothuis# Note the "AKST" and "AKDT" abbreviations, the claim that there's 2271315084cSEdwin Groothuis# no DST in Samoa, and the claim that there is DST in Alaska and the 2281315084cSEdwin Groothuis# Aleutians. 2291315084cSEdwin Groothuis 2301315084cSEdwin Groothuis# From Arthur David Olson (1988-02-13): 2311315084cSEdwin Groothuis# Legal standard time zone names, from United States Code (1982 Edition and 2321315084cSEdwin Groothuis# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 2331315084cSEdwin Groothuis# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2341315084cSEdwin Groothuis# took effect), as explained in sections 263 and 261: 2351315084cSEdwin Groothuis# (none) 2361315084cSEdwin Groothuis# United States standard eastern time 2371315084cSEdwin Groothuis# United States standard mountain time 2381315084cSEdwin Groothuis# United States standard central time 2391315084cSEdwin Groothuis# United States standard Pacific time 2401315084cSEdwin Groothuis# (none) 2411315084cSEdwin Groothuis# United States standard Alaska time 2421315084cSEdwin Groothuis# (none) 2431315084cSEdwin Groothuis# Next, names from 1967-04-01 until 1983-11-30 (the date for 2441315084cSEdwin Groothuis# public law 98-181): 2451315084cSEdwin Groothuis# Atlantic standard time 2461315084cSEdwin Groothuis# eastern standard time 2471315084cSEdwin Groothuis# central standard time 2481315084cSEdwin Groothuis# mountain standard time 2491315084cSEdwin Groothuis# Pacific standard time 2501315084cSEdwin Groothuis# Yukon standard time 2511315084cSEdwin Groothuis# Alaska-Hawaii standard time 2521315084cSEdwin Groothuis# Bering standard time 2531315084cSEdwin Groothuis# And after 1983-11-30: 2541315084cSEdwin Groothuis# Atlantic standard time 2551315084cSEdwin Groothuis# eastern standard time 2561315084cSEdwin Groothuis# central standard time 2571315084cSEdwin Groothuis# mountain standard time 2581315084cSEdwin Groothuis# Pacific standard time 2591315084cSEdwin Groothuis# Alaska standard time 2601315084cSEdwin Groothuis# Hawaii-Aleutian standard time 2611315084cSEdwin Groothuis# Samoa standard time 2621315084cSEdwin Groothuis# The law doesn't give abbreviations. 2631315084cSEdwin Groothuis# 264dc135c6eSBaptiste Daroussin# From Paul Eggert (2016-12-19): 265dc135c6eSBaptiste Daroussin# Here are URLs for the 1918 and 1966 legislation: 266dc135c6eSBaptiste Daroussin# http://uscode.house.gov/statviewer.htm?volume=40&page=451 267dc135c6eSBaptiste Daroussin# http://uscode.house.gov/statviewer.htm?volume=80&page=108 268dc135c6eSBaptiste Daroussin# Although the 1918 names were officially "United States Standard 269dc135c6eSBaptiste Daroussin# Eastern Time" and similarly for "Central", "Mountain", "Pacific", 270dc135c6eSBaptiste Daroussin# and "Alaska", in practice "Standard" was placed just before "Time", 271dc135c6eSBaptiste Daroussin# as codified in 1966. In practice, Alaska time was abbreviated "AST" 272dc135c6eSBaptiste Daroussin# before 1968. Summarizing the 1967 name changes: 273dc135c6eSBaptiste Daroussin# 1918 names 1967 names 274dc135c6eSBaptiste Daroussin# -08 Standard Pacific Time (PST) Pacific standard time (PST) 275dc135c6eSBaptiste Daroussin# -09 (unofficial) Yukon (YST) Yukon standard time (YST) 276dc135c6eSBaptiste Daroussin# -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) 277dc135c6eSBaptiste Daroussin# -11 (unofficial) Nome (NST) Bering standard time (BST) 278dc135c6eSBaptiste Daroussin# 279259e2ad7SPhilip Paeps# From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: 280259e2ad7SPhilip Paeps# Public law 106-564 (2000-12-23) introduced "Chamorro standard time" 281abdc8d91SEdwin Groothuis# for time in Guam and the Northern Marianas. See the file "australasia". 282259e2ad7SPhilip Paeps# Also see 15 U.S.C. §263 <https://www.law.cornell.edu/uscode/text/15/263>. 283abdc8d91SEdwin Groothuis# 284abdc8d91SEdwin Groothuis# From Paul Eggert (2015-04-17): 285abdc8d91SEdwin Groothuis# HST and HDT are standardized abbreviations for Hawaii-Aleutian 286abdc8d91SEdwin Groothuis# standard and daylight times. See section 9.47 (p 234) of the 287abdc8d91SEdwin Groothuis# U.S. Government Printing Office Style Manual (2008) 2888d7edd17SPhilip Paeps# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 2891315084cSEdwin Groothuis 2901315084cSEdwin Groothuis# From Arthur David Olson, 2005-08-09 2911315084cSEdwin Groothuis# The following was signed into law on 2005-08-08. 2921315084cSEdwin Groothuis# 2931315084cSEdwin Groothuis# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 294eb1c1a05SSergey Kandaurov# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 2951315084cSEdwin Groothuis# U.S.C. 260a(a)) is amended-- 296eb1c1a05SSergey Kandaurov# (1) by striking "first Sunday of April" and inserting "second 297eb1c1a05SSergey Kandaurov# Sunday of March"; and 298eb1c1a05SSergey Kandaurov# (2) by striking "last Sunday of October" and inserting "first 2991315084cSEdwin Groothuis# Sunday of November'. 300eb1c1a05SSergey Kandaurov# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 3011315084cSEdwin Groothuis# date of enactment of this Act or March 1, 2007, whichever is later. 302eb1c1a05SSergey Kandaurov# (c) Report to Congress.--Not later than 9 months after the effective 3031315084cSEdwin Groothuis# date stated in subsection (b), the Secretary shall report to Congress 3041315084cSEdwin Groothuis# on the impact of this section on energy consumption in the United 3051315084cSEdwin Groothuis# States. 306eb1c1a05SSergey Kandaurov# (d) Right to Revert.--Congress retains the right to revert the 3071315084cSEdwin Groothuis# Daylight Saving Time back to the 2005 time schedules once the 3081315084cSEdwin Groothuis# Department study is complete. 3091315084cSEdwin Groothuis 3101315084cSEdwin Groothuis# US eastern time, represented by New York 3111315084cSEdwin Groothuis 3121315084cSEdwin Groothuis# Connecticut, Delaware, District of Columbia, most of Florida, 3131315084cSEdwin Groothuis# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 3141315084cSEdwin Groothuis# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 3151315084cSEdwin Groothuis# New Hampshire, New Jersey, New York, North Carolina, Ohio, 3161315084cSEdwin Groothuis# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 3171315084cSEdwin Groothuis# Vermont, Virginia, West Virginia 3181315084cSEdwin Groothuis 3191315084cSEdwin Groothuis# From Dave Cantor (2004-11-02): 3201315084cSEdwin Groothuis# Early this summer I had the occasion to visit the Mount Washington 3211315084cSEdwin Groothuis# Observatory weather station atop (of course!) Mount Washington [, NH].... 3221315084cSEdwin Groothuis# One of the staff members said that the station was on Eastern Standard Time 3231315084cSEdwin Groothuis# and didn't change their clocks for Daylight Saving ... so that their 3241315084cSEdwin Groothuis# reports will always have times which are 5 hours behind UTC. 3251315084cSEdwin Groothuis 3261315084cSEdwin Groothuis# From Paul Eggert (2005-08-26): 3271315084cSEdwin Groothuis# According to today's Huntsville Times 3287ce0f064SEdwin Groothuis# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 3291315084cSEdwin Groothuis# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 3301315084cSEdwin Groothuis# in Russell County, Lanett in Chambers County and some towns in Lee County, 3311315084cSEdwin Groothuis# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 3321315084cSEdwin Groothuis# Roberts, city administrator in Phenix City. as saying "We are in the Central 3331315084cSEdwin Groothuis# time zone, but we do go by the Eastern time zone because so many people work 3341315084cSEdwin Groothuis# in Columbus." 335dc135c6eSBaptiste Daroussin# 336dc135c6eSBaptiste Daroussin# From Paul Eggert (2017-02-22): 337dc135c6eSBaptiste Daroussin# Four cities are involved. The two not mentioned above are Smiths Station 338dc135c6eSBaptiste Daroussin# and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started 339dc135c6eSBaptiste Daroussin# because West Point Pepperell textile mills were in Alabama while the 340dc135c6eSBaptiste Daroussin# corporate office was in Georgia, and residents voted to keep Eastern 341dc135c6eSBaptiste Daroussin# time even after the mills closed. See: Kazek K. Did you know which 342dc135c6eSBaptiste Daroussin# Alabama towns are in a different time zone? al.com 2017-02-06. 343dc135c6eSBaptiste Daroussin# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html 3441315084cSEdwin Groothuis 3457ce0f064SEdwin Groothuis# From Paul Eggert (2014-09-06): 3467ce0f064SEdwin Groothuis# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 3477ce0f064SEdwin Groothuis# says that New York City Hall time was 3 minutes 58.4 seconds fast of 3489f9fc6bbSPhilip Paeps# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. 3497ce0f064SEdwin Groothuis 35012a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 3511315084cSEdwin GroothuisRule NYC 1920 only - Mar lastSun 2:00 1:00 D 3521315084cSEdwin GroothuisRule NYC 1920 only - Oct lastSun 2:00 0 S 3531315084cSEdwin GroothuisRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 3541315084cSEdwin GroothuisRule NYC 1921 1954 - Sep lastSun 2:00 0 S 3551315084cSEdwin GroothuisRule NYC 1955 1966 - Oct lastSun 2:00 0 S 3562865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 3579f9fc6bbSPhilip Paeps #STDOFF -4:56:01.6 3589f9fc6bbSPhilip PaepsZone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u 3591315084cSEdwin Groothuis -5:00 US E%sT 1920 3601315084cSEdwin Groothuis -5:00 NYC E%sT 1942 3611315084cSEdwin Groothuis -5:00 US E%sT 1946 3621315084cSEdwin Groothuis -5:00 NYC E%sT 1967 3631315084cSEdwin Groothuis -5:00 US E%sT 3641315084cSEdwin Groothuis 3651315084cSEdwin Groothuis# US central time, represented by Chicago 3661315084cSEdwin Groothuis 3671315084cSEdwin Groothuis# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 3681315084cSEdwin Groothuis# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 3691315084cSEdwin Groothuis# Washington counties), Illinois, western Indiana 3701315084cSEdwin Groothuis# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 3711315084cSEdwin Groothuis# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 3721315084cSEdwin Groothuis# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 3731315084cSEdwin Groothuis# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 3741315084cSEdwin Groothuis# western Tennessee, most of Texas, Wisconsin 3751315084cSEdwin Groothuis 376f2fcff28SPhilip Paeps# From Paul Eggert (2018-01-07): 377f2fcff28SPhilip Paeps# In 1869 the Chicago Astronomical Society contracted with the city to keep 378f2fcff28SPhilip Paeps# time. Though delayed by the Great Fire, by 1880 a wire ran from the 379f2fcff28SPhilip Paeps# Dearborn Observatory (on the University of Chicago campus) to City Hall, 380f2fcff28SPhilip Paeps# which then sent signals to police and fire stations. However, railroads got 381f2fcff28SPhilip Paeps# their time signals from the Allegheny Observatory, the Madison Observatory, 382f2fcff28SPhilip Paeps# the Ann Arbor Observatory, etc., so their clocks did not agree with each 383f2fcff28SPhilip Paeps# other or with the city's official time. The confusion took some years to 384f2fcff28SPhilip Paeps# clear up. See: 385f2fcff28SPhilip Paeps# Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. 386f2fcff28SPhilip Paeps# http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ 387f2fcff28SPhilip Paeps 3881315084cSEdwin Groothuis# From Larry M. Smith (2006-04-26) re Wisconsin: 3898d7edd17SPhilip Paeps# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf 3901315084cSEdwin Groothuis# is currently enforced at the 01:00 time of change. Because the local 3911315084cSEdwin Groothuis# "bar time" in the state corresponds to 02:00, a number of citations 3921315084cSEdwin Groothuis# are issued for the "sale of class 'B' alcohol after prohibited 3931315084cSEdwin Groothuis# hours" within the deviated hour of this change every year.... 3941315084cSEdwin Groothuis# 3951315084cSEdwin Groothuis# From Douglas R. Bomberg (2007-03-12): 3961315084cSEdwin Groothuis# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 3971315084cSEdwin Groothuis# Statue 175 closer in synch with the US Congress' intent.... 3988d7edd17SPhilip Paeps# https://docs.legis.wisconsin.gov/2007/related/acts/3 3991315084cSEdwin Groothuis 4008fdf5721SBaptiste Daroussin# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 4018fdf5721SBaptiste Daroussin# Fort Pierre is technically located in the Mountain time zone as is 4028fdf5721SBaptiste Daroussin# the rest of Stanley County. Most of Stanley County and Fort Pierre 4038fdf5721SBaptiste Daroussin# uses the Central time zone due to doing most of their business in 4048fdf5721SBaptiste Daroussin# Pierre so it simplifies schedules. I have lived in Stanley County 4058fdf5721SBaptiste Daroussin# all my life and it has been that way since I can remember. (43 years!) 4068fdf5721SBaptiste Daroussin# 4078fdf5721SBaptiste Daroussin# From Paul Eggert (2015-12-25): 4088fdf5721SBaptiste Daroussin# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 4098fdf5721SBaptiste Daroussin 410798c0c0bSPhilip Paeps# From Paul Eggert (2015-04-06): 411798c0c0bSPhilip Paeps# In 1950s Nashville a public clock had dueling faces, one for conservatives 412798c0c0bSPhilip Paeps# and the other for liberals; the two sides didn't agree about the time of day. 413798c0c0bSPhilip Paeps# I haven't found a photo of this clock, nor have I tracked down the TIME 414798c0c0bSPhilip Paeps# magazine report cited below, but here's the story as told by the late 415798c0c0bSPhilip Paeps# American journalist John Seigenthaler, who was there: 416798c0c0bSPhilip Paeps# 417798c0c0bSPhilip Paeps# "The two [newspaper] owners held strongly contrasting political and 418798c0c0bSPhilip Paeps# ideological views. Evans was a New South liberal, Stahlman an Old South 419798c0c0bSPhilip Paeps# conservative, and their two papers frequently clashed editorially, often on 420798c0c0bSPhilip Paeps# the same day.... In the 1950s as the state legislature was grappling with 421798c0c0bSPhilip Paeps# the question of whether to approve daylight saving time for the entire state, 422798c0c0bSPhilip Paeps# TIME magazine reported: 423798c0c0bSPhilip Paeps# 424798c0c0bSPhilip Paeps# "'The Nashville Banner and The Nashville Tennessean rarely agree on anything 425798c0c0bSPhilip Paeps# but the time of day - and last week they couldn't agree on that.' 426798c0c0bSPhilip Paeps# 427798c0c0bSPhilip Paeps# "It was all too true. The clock on the front of the building had two faces - 428798c0c0bSPhilip Paeps# The Tennessean side of the building facing west, the other, east. When it 429798c0c0bSPhilip Paeps# was high noon Banner time, it was 11 a.m. Tennessean time." 430798c0c0bSPhilip Paeps# 431798c0c0bSPhilip Paeps# Seigenthaler J. For 100 years, Tennessean had it covered. 432798c0c0bSPhilip Paeps# The Tennessean 2007-05-11, republished 2015-04-06. 433798c0c0bSPhilip Paeps# https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ 434798c0c0bSPhilip Paeps 43512a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 4361315084cSEdwin GroothuisRule Chicago 1920 only - Jun 13 2:00 1:00 D 4371315084cSEdwin GroothuisRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 4381315084cSEdwin GroothuisRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 4391315084cSEdwin GroothuisRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 4401315084cSEdwin GroothuisRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 4411315084cSEdwin GroothuisRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 4422865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 4435d56371cSPhilip PaepsZone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u 4441315084cSEdwin Groothuis -6:00 US C%sT 1920 4451315084cSEdwin Groothuis -6:00 Chicago C%sT 1936 Mar 1 2:00 4461315084cSEdwin Groothuis -5:00 - EST 1936 Nov 15 2:00 4471315084cSEdwin Groothuis -6:00 Chicago C%sT 1942 4481315084cSEdwin Groothuis -6:00 US C%sT 1946 4491315084cSEdwin Groothuis -6:00 Chicago C%sT 1967 4501315084cSEdwin Groothuis -6:00 US C%sT 4511315084cSEdwin Groothuis# Oliver County, ND switched from mountain to central time on 1992-10-25. 4525d56371cSPhilip PaepsZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u 4537ce0f064SEdwin Groothuis -7:00 US M%sT 1992 Oct 25 2:00 4541315084cSEdwin Groothuis -6:00 US C%sT 4551315084cSEdwin Groothuis# Morton County, ND, switched from mountain to central time on 4561315084cSEdwin Groothuis# 2003-10-26, except for the area around Mandan which was already central time. 4571315084cSEdwin Groothuis# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 4581315084cSEdwin Groothuis# Officially this switch also included part of Sioux County, and 4591315084cSEdwin Groothuis# Jones, Mellette, and Todd Counties in South Dakota; 4601315084cSEdwin Groothuis# but in practice these other counties were already observing central time. 4611315084cSEdwin Groothuis# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 4625d56371cSPhilip PaepsZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u 4637ce0f064SEdwin Groothuis -7:00 US M%sT 2003 Oct 26 2:00 4641315084cSEdwin Groothuis -6:00 US C%sT 4651315084cSEdwin Groothuis 466229f1985SEdwin Groothuis# From Josh Findley (2011-01-21): 467229f1985SEdwin Groothuis# ...it appears that Mercer County, North Dakota, changed from the 468229f1985SEdwin Groothuis# mountain time zone to the central time zone at the last transition from 469229f1985SEdwin Groothuis# daylight-saving to standard time (on Nov. 7, 2010): 4708d7edd17SPhilip Paeps# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 471229f1985SEdwin Groothuis# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 472229f1985SEdwin Groothuis 473229f1985SEdwin Groothuis# From Andy Lipscomb (2011-01-24): 474229f1985SEdwin Groothuis# ...according to the Census Bureau, the largest city is Beulah (although 475229f1985SEdwin Groothuis# it's commonly referred to as Beulah-Hazen, with Hazen being the next 476229f1985SEdwin Groothuis# largest city in Mercer County). Google Maps places Beulah's city hall 47746bee4edSPhilip Paeps# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". 478229f1985SEdwin Groothuis 4795d56371cSPhilip PaepsZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u 480229f1985SEdwin Groothuis -7:00 US M%sT 2010 Nov 7 2:00 481229f1985SEdwin Groothuis -6:00 US C%sT 482229f1985SEdwin Groothuis 4831315084cSEdwin Groothuis# US mountain time, represented by Denver 4841315084cSEdwin Groothuis# 4851315084cSEdwin Groothuis# Colorado, far western Kansas, Montana, western 4861315084cSEdwin Groothuis# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 4871315084cSEdwin Groothuis# New Mexico, southwestern North Dakota, 4881315084cSEdwin Groothuis# western South Dakota, far western Texas (El Paso County, Hudspeth County, 4891315084cSEdwin Groothuis# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 4901315084cSEdwin Groothuis# 491b9994124SPhilip Paeps# From Paul Eggert (2018-10-25): 492b9994124SPhilip Paeps# On 1921-03-04 federal law placed all of Texas into the central time zone. 493b9994124SPhilip Paeps# However, El Paso ignored the law for decades and continued to observe 494b9994124SPhilip Paeps# mountain time, on the grounds that that's what they had always done 495b9994124SPhilip Paeps# and they weren't about to let the federal government tell them what to do. 496b9994124SPhilip Paeps# Eventually the federal government gave in and changed the law on 497b9994124SPhilip Paeps# 1970-04-10 to match what El Paso was actually doing. Although 498b9994124SPhilip Paeps# that's slightly after our 1970 cutoff, there is no need to create a 499b9994124SPhilip Paeps# separate zone for El Paso since they were ignoring the law anyway. See: 500b9994124SPhilip Paeps# Long T. El Pasoans were time rebels, fought to stay in Mountain zone. 501b9994124SPhilip Paeps# El Paso Times. 2018-10-24 06:40 -06. 502b9994124SPhilip Paeps# https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ 503b9994124SPhilip Paeps# 50412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 5051315084cSEdwin GroothuisRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 5061315084cSEdwin GroothuisRule Denver 1920 only - Oct lastSun 2:00 0 S 5071315084cSEdwin GroothuisRule Denver 1921 only - May 22 2:00 0 S 5081315084cSEdwin GroothuisRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 5091315084cSEdwin GroothuisRule Denver 1965 1966 - Oct lastSun 2:00 0 S 5102865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 5115d56371cSPhilip PaepsZone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u 5121315084cSEdwin Groothuis -7:00 US M%sT 1920 5131315084cSEdwin Groothuis -7:00 Denver M%sT 1942 5141315084cSEdwin Groothuis -7:00 US M%sT 1946 5151315084cSEdwin Groothuis -7:00 Denver M%sT 1967 5161315084cSEdwin Groothuis -7:00 US M%sT 5171315084cSEdwin Groothuis 5181315084cSEdwin Groothuis# US Pacific time, represented by Los Angeles 5191315084cSEdwin Groothuis# 5201315084cSEdwin Groothuis# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 521890859c7SEdwin Groothuis# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 522890859c7SEdwin Groothuis# north of the Salmon River, and the towns of Burgdorf and Warren), 52346bee4edSPhilip Paeps# Nevada (except West Wendover), Oregon (except the northern ¾ of 524890859c7SEdwin Groothuis# Malheur county), and Washington 5258fdf5721SBaptiste Daroussin 5268fdf5721SBaptiste Daroussin# From Paul Eggert (2016-08-20): 5278fdf5721SBaptiste Daroussin# In early February 1948, in response to California's electricity shortage, 5288fdf5721SBaptiste Daroussin# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 5298fdf5721SBaptiste Daroussin# causing electric clocks to lose six minutes per day. (This did not change 5308fdf5721SBaptiste Daroussin# legal time, and is not part of the data here.) See: 5318fdf5721SBaptiste Daroussin# Ross SA. An energy crisis from the past: Northern California in 1948. 5328fdf5721SBaptiste Daroussin# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 5338d7edd17SPhilip Paeps# 1973-11. https://escholarship.org/uc/item/8x22k30c 5348fdf5721SBaptiste Daroussin# 5358fdf5721SBaptiste Daroussin# In another measure to save electricity, DST was instituted from 1948-03-14 5368fdf5721SBaptiste Daroussin# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 5378fdf5721SBaptiste Daroussin# the fallback transition earlier. See pages 3-4 of: 5388fdf5721SBaptiste Daroussin# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 5398fdf5721SBaptiste Daroussin# 5408fdf5721SBaptiste Daroussin# In response: 5418fdf5721SBaptiste Daroussin# 5428fdf5721SBaptiste Daroussin# Governor Warren received a torrent of objecting mail, and it is not too much 5438fdf5721SBaptiste Daroussin# to speculate that the objections to Daylight Saving Time were one important 5448fdf5721SBaptiste Daroussin# factor in the defeat of the Dewey-Warren Presidential ticket in California. 5458fdf5721SBaptiste Daroussin# -- Ross, p 25 5468fdf5721SBaptiste Daroussin# 5478fdf5721SBaptiste Daroussin# On December 8 the governor exercised the option, setting the date to January 1 5488fdf5721SBaptiste Daroussin# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 5498fdf5721SBaptiste Daroussin# 5508fdf5721SBaptiste Daroussin# Despite the controversy, in 1949 California voters approved Proposition 12, 5518fdf5721SBaptiste Daroussin# which established DST from April's last Sunday at 01:00 until September's 5528fdf5721SBaptiste Daroussin# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 5538fdf5721SBaptiste Daroussin# the fall-back date to October's last Sunday. See: 5548d7edd17SPhilip Paeps# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 5558d7edd17SPhilip Paeps# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 5561315084cSEdwin Groothuis# 55712a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 5588fdf5721SBaptiste DaroussinRule CA 1948 only - Mar 14 2:01 1:00 D 5591315084cSEdwin GroothuisRule CA 1949 only - Jan 1 2:00 0 S 5608fdf5721SBaptiste DaroussinRule CA 1950 1966 - Apr lastSun 1:00 1:00 D 5611315084cSEdwin GroothuisRule CA 1950 1961 - Sep lastSun 2:00 0 S 5621315084cSEdwin GroothuisRule CA 1962 1966 - Oct lastSun 2:00 0 S 5632865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 5645d56371cSPhilip PaepsZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u 5651315084cSEdwin Groothuis -8:00 US P%sT 1946 5661315084cSEdwin Groothuis -8:00 CA P%sT 1967 5671315084cSEdwin Groothuis -8:00 US P%sT 5681315084cSEdwin Groothuis 5691315084cSEdwin Groothuis# Alaska 570dc135c6eSBaptiste Daroussin# AK%sT is the modern abbreviation for -09 per USNO. 5711315084cSEdwin Groothuis# 5728d7edd17SPhilip Paeps# From Paul Eggert (2017-06-15): 5731315084cSEdwin Groothuis# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 5741315084cSEdwin Groothuis# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 5758d7edd17SPhilip Paeps# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the 5768d7edd17SPhilip Paeps# Russian forts and fleet at Sitka fired salutes to mark the ceremony of 5778d7edd17SPhilip Paeps# formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. 5788d7edd17SPhilip Paeps# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 5798d7edd17SPhilip Paeps# Sitka workers did not change their calendars until Sunday, 1867-10-20, 5808d7edd17SPhilip Paeps# and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). 5818d7edd17SPhilip Paeps# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. 5828d7edd17SPhilip Paeps# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf 5838d7edd17SPhilip Paeps# Include only the time zone part of this transition, ignoring the switch 5848d7edd17SPhilip Paeps# from Julian to Gregorian, since we can't represent the Julian calendar. 5851315084cSEdwin Groothuis# 5868d7edd17SPhilip Paeps# As far as we know, of the locations mentioned below only Sitka was 5871315084cSEdwin Groothuis# permanently inhabited in 1867 by anyone using either calendar. 5888d7edd17SPhilip Paeps# (Yakutat was colonized by the Russians in 1799, but the settlement was 5898d7edd17SPhilip Paeps# destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants 5908d7edd17SPhilip Paeps# were unaware of the US acquisition of Alaska, much less of any calendar or 5918d7edd17SPhilip Paeps# time change. However, the Russian-influenced part of Alaska did observe 5928d7edd17SPhilip Paeps# Russian time, and it is more accurate to model this than to ignore it. 5938d7edd17SPhilip Paeps# The database format requires an exact transition time; use the Russian 5948d7edd17SPhilip Paeps# salute as a somewhat-arbitrary time for the formal transfer of control for 5958d7edd17SPhilip Paeps# all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the 5968d7edd17SPhilip Paeps# local times of other Alaskan locations so that they change simultaneously. 597f2ad6fdcSEdwin Groothuis 598eb1c1a05SSergey Kandaurov# From Paul Eggert (2014-07-18): 599259e2ad7SPhilip Paeps# One opinion of the early 1980s turmoil in Alaska over time zones and 600eb1c1a05SSergey Kandaurov# daylight saving time appeared as graffiti on a Juneau airport wall: 601eb1c1a05SSergey Kandaurov# "Welcome to Juneau. Please turn your watch back to the 19th century." 602eb1c1a05SSergey Kandaurov# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 603eb1c1a05SSergey Kandaurov# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 604f2ad6fdcSEdwin Groothuis# 605eb1c1a05SSergey Kandaurov# Steve Ferguson (2011-01-31) referred to the following source: 606eb1c1a05SSergey Kandaurov# Norris F. Keeping time in Alaska: national directives, local response. 607eb1c1a05SSergey Kandaurov# Alaska History 2001;16(1-2). 608eb1c1a05SSergey Kandaurov# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 609f2ad6fdcSEdwin Groothuis 610f2ad6fdcSEdwin Groothuis# From Arthur David Olson (2011-02-01): 611f2ad6fdcSEdwin Groothuis# Here's database-relevant material from the 2001 "Alaska History" article: 612f2ad6fdcSEdwin Groothuis# 613f2ad6fdcSEdwin Groothuis# On September 20 [1979]...DOT...officials decreed that on April 27, 614f2ad6fdcSEdwin Groothuis# 1980, Juneau and other nearby communities would move to Yukon Time. 615f2ad6fdcSEdwin Groothuis# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 616f2ad6fdcSEdwin Groothuis# Pacific Time. 617f2ad6fdcSEdwin Groothuis# 618f2ad6fdcSEdwin Groothuis# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 619f2ad6fdcSEdwin Groothuis# Department's September 1979 decision. Juneau and other communities in 620f2ad6fdcSEdwin Groothuis# northern Southeast reverted to Pacific Time on October 26. 621f2ad6fdcSEdwin Groothuis# 622f2ad6fdcSEdwin Groothuis# On October 28 [1983]...the Metlakatla Indian Community Council voted 623f2ad6fdcSEdwin Groothuis# unanimously to keep the reservation on Pacific Time. 624f2ad6fdcSEdwin Groothuis# 625f2ad6fdcSEdwin Groothuis# According to DOT official Joanne Petrie, Indian reservations are not 626f2ad6fdcSEdwin Groothuis# bound to follow time zones imposed by neighboring jurisdictions. 627f2ad6fdcSEdwin Groothuis# 628f2ad6fdcSEdwin Groothuis# (The last is consistent with how the database now handles the Navajo 629f2ad6fdcSEdwin Groothuis# Nation.) 630f2ad6fdcSEdwin Groothuis 631f2ad6fdcSEdwin Groothuis# From Arthur David Olson (2011-02-09): 632f2ad6fdcSEdwin Groothuis# I just spoke by phone with a staff member at the Metlakatla Indian 633f2ad6fdcSEdwin Groothuis# Community office (using contact information available at 634f2ad6fdcSEdwin Groothuis# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 635f2ad6fdcSEdwin Groothuis# It's shortly after 1:00 here on the east coast of the United States; 636f2ad6fdcSEdwin Groothuis# the staffer said it was shortly after 10:00 there. When I asked whether 637eb1c1a05SSergey Kandaurov# that meant they were on Pacific time, they said no - they were on their 638f2ad6fdcSEdwin Groothuis# own time. I asked about daylight saving; they said it wasn't used. I 639f2ad6fdcSEdwin Groothuis# did not inquire about practices in the past. 640f2ad6fdcSEdwin Groothuis 641958890b7SEdwin Groothuis# From Arthur David Olson (2011-08-17): 642958890b7SEdwin Groothuis# For lack of better information, assume that Metlakatla's 643958890b7SEdwin Groothuis# abandonment of use of daylight saving resulted from the 1983 vote. 644958890b7SEdwin Groothuis 6458fdf5721SBaptiste Daroussin# From Steffen Thorsen (2015-11-09): 6468fdf5721SBaptiste Daroussin# It seems Metlakatla did go off PST on Sunday, November 1, changing 6478fdf5721SBaptiste Daroussin# their time to AKST and are going to follow Alaska's DST, switching 6488fdf5721SBaptiste Daroussin# between AKST and AKDT from now on.... 6498d7edd17SPhilip Paeps# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 6508fdf5721SBaptiste Daroussin 6512c5e84ccSPhilip Paeps# From Ryan Stanley (2018-11-06): 6522c5e84ccSPhilip Paeps# The Metlakatla community in Alaska has decided not to change its 6532c5e84ccSPhilip Paeps# clock back an hour starting on November 4th, 2018 (day before yesterday). 6542c5e84ccSPhilip Paeps# They will be gmtoff=-28800 year-round. 6552c5e84ccSPhilip Paeps# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ 6562c5e84ccSPhilip Paeps 6572c5e84ccSPhilip Paeps# From Paul Eggert (2018-12-16): 6582c5e84ccSPhilip Paeps# In a 2018-12-11 special election, Metlakatla voted to go back to 6592c5e84ccSPhilip Paeps# Alaska time (including daylight saving time) starting next year. 6602c5e84ccSPhilip Paeps# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ 661ad48359aSPhilip Paeps# 662ad48359aSPhilip Paeps# From Ryan Stanley (2019-01-11): 663ad48359aSPhilip Paeps# The community will be changing back on the 20th of this month... 664ad48359aSPhilip Paeps# From Tim Parenti (2019-01-11): 665ad48359aSPhilip Paeps# Per an announcement on the Metlakatla community's official Facebook page, the 666ad48359aSPhilip Paeps# "fall back" will be on Sunday 2019-01-20 at 02:00: 667ad48359aSPhilip Paeps# https://www.facebook.com/141055983004923/photos/607150969728753/ 668ad48359aSPhilip Paeps# So they won't be waiting for Alaska to join them on 2019-03-10, but will 669ad48359aSPhilip Paeps# rather change their clocks twice in seven weeks. 6702c5e84ccSPhilip Paeps 671259e2ad7SPhilip Paeps# From Paul Eggert (2023-01-23): 672259e2ad7SPhilip Paeps# America/Adak is for the Aleutian Islands that are part of Alaska 673259e2ad7SPhilip Paeps# and are west of 169.5° W. 674259e2ad7SPhilip Paeps 6752865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 6768d7edd17SPhilip PaepsZone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 6771315084cSEdwin Groothuis -8:57:41 - LMT 1900 Aug 20 12:00 6781315084cSEdwin Groothuis -8:00 - PST 1942 6791315084cSEdwin Groothuis -8:00 US P%sT 1946 6801315084cSEdwin Groothuis -8:00 - PST 1969 681f2ad6fdcSEdwin Groothuis -8:00 US P%sT 1980 Apr 27 2:00 682f2ad6fdcSEdwin Groothuis -9:00 US Y%sT 1980 Oct 26 2:00 6831315084cSEdwin Groothuis -8:00 US P%sT 1983 Oct 30 2:00 6841315084cSEdwin Groothuis -9:00 US Y%sT 1983 Nov 30 6851315084cSEdwin Groothuis -9:00 US AK%sT 6868d7edd17SPhilip PaepsZone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 687f2ad6fdcSEdwin Groothuis -9:01:13 - LMT 1900 Aug 20 12:00 688f2ad6fdcSEdwin Groothuis -8:00 - PST 1942 689f2ad6fdcSEdwin Groothuis -8:00 US P%sT 1946 690f2ad6fdcSEdwin Groothuis -8:00 - PST 1969 691f2ad6fdcSEdwin Groothuis -8:00 US P%sT 1983 Oct 30 2:00 692f2ad6fdcSEdwin Groothuis -9:00 US Y%sT 1983 Nov 30 693f2ad6fdcSEdwin Groothuis -9:00 US AK%sT 6948d7edd17SPhilip PaepsZone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 695f2ad6fdcSEdwin Groothuis -8:46:18 - LMT 1900 Aug 20 12:00 696f2ad6fdcSEdwin Groothuis -8:00 - PST 1942 697f2ad6fdcSEdwin Groothuis -8:00 US P%sT 1946 698f2ad6fdcSEdwin Groothuis -8:00 - PST 1969 699f2ad6fdcSEdwin Groothuis -8:00 US P%sT 1983 Oct 30 2:00 7008fdf5721SBaptiste Daroussin -8:00 - PST 2015 Nov 1 2:00 7012c5e84ccSPhilip Paeps -9:00 US AK%sT 2018 Nov 4 2:00 702ad48359aSPhilip Paeps -8:00 - PST 2019 Jan 20 2:00 7038fdf5721SBaptiste Daroussin -9:00 US AK%sT 7048d7edd17SPhilip PaepsZone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 7051315084cSEdwin Groothuis -9:18:55 - LMT 1900 Aug 20 12:00 7061315084cSEdwin Groothuis -9:00 - YST 1942 7071315084cSEdwin Groothuis -9:00 US Y%sT 1946 7081315084cSEdwin Groothuis -9:00 - YST 1969 7091315084cSEdwin Groothuis -9:00 US Y%sT 1983 Nov 30 7101315084cSEdwin Groothuis -9:00 US AK%sT 7118d7edd17SPhilip PaepsZone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 7121315084cSEdwin Groothuis -9:59:36 - LMT 1900 Aug 20 12:00 713dc135c6eSBaptiste Daroussin -10:00 - AST 1942 714dc135c6eSBaptiste Daroussin -10:00 US A%sT 1967 Apr 7151315084cSEdwin Groothuis -10:00 - AHST 1969 7161315084cSEdwin Groothuis -10:00 US AH%sT 1983 Oct 30 2:00 7171315084cSEdwin Groothuis -9:00 US Y%sT 1983 Nov 30 7181315084cSEdwin Groothuis -9:00 US AK%sT 7198d7edd17SPhilip PaepsZone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 7201315084cSEdwin Groothuis -11:01:38 - LMT 1900 Aug 20 12:00 7211315084cSEdwin Groothuis -11:00 - NST 1942 7221315084cSEdwin Groothuis -11:00 US N%sT 1946 7231315084cSEdwin Groothuis -11:00 - NST 1967 Apr 7241315084cSEdwin Groothuis -11:00 - BST 1969 7251315084cSEdwin Groothuis -11:00 US B%sT 1983 Oct 30 2:00 7261315084cSEdwin Groothuis -9:00 US Y%sT 1983 Nov 30 7271315084cSEdwin Groothuis -9:00 US AK%sT 7288d7edd17SPhilip PaepsZone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 7291315084cSEdwin Groothuis -11:46:38 - LMT 1900 Aug 20 12:00 7301315084cSEdwin Groothuis -11:00 - NST 1942 7311315084cSEdwin Groothuis -11:00 US N%sT 1946 7321315084cSEdwin Groothuis -11:00 - NST 1967 Apr 7331315084cSEdwin Groothuis -11:00 - BST 1969 7341315084cSEdwin Groothuis -11:00 US B%sT 1983 Oct 30 2:00 7351315084cSEdwin Groothuis -10:00 US AH%sT 1983 Nov 30 736abdc8d91SEdwin Groothuis -10:00 US H%sT 73794c2d487SPhilip Paeps# The following switches don't make our 1970 cutoff. 73894c2d487SPhilip Paeps# 73994c2d487SPhilip Paeps# Kiska observed Tokyo date and time during Japanese occupation from 74094c2d487SPhilip Paeps# 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to 74194c2d487SPhilip Paeps# 1943-05-29 (all dates American). Both islands are now uninhabited. 7421315084cSEdwin Groothuis# 7431315084cSEdwin Groothuis# Shanks writes that part of southwest Alaska (e.g. Aniak) 7441315084cSEdwin Groothuis# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 7451315084cSEdwin Groothuis# and another part (e.g. Akiak) made the same switch five weeks later. 7461315084cSEdwin Groothuis# 7471315084cSEdwin Groothuis# From David Flater (2004-11-09): 7481315084cSEdwin Groothuis# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 7491315084cSEdwin Groothuis# Historic Preservation Commission, provided this information, which 7501315084cSEdwin Groothuis# suggests that Unalaska deviated from statutory time from early 1967 7511315084cSEdwin Groothuis# possibly until 1983: 7521315084cSEdwin Groothuis# 7531315084cSEdwin Groothuis# Minutes of the Unalaska City Council Meeting, January 10, 1967: 7541315084cSEdwin Groothuis# "Except for St. Paul and Akutan, Unalaska is the only important 7551315084cSEdwin Groothuis# location not on Alaska Standard Time. The following resolution was 7561315084cSEdwin Groothuis# made by William Robinson and seconded by Henry Swanson: Be it 7571315084cSEdwin Groothuis# resolved that the City of Unalaska hereby goes to Alaska Standard 7581315084cSEdwin Groothuis# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 7591315084cSEdwin Groothuis# January 14, Alaska Standard Time.) This resolution was passed with 7601315084cSEdwin Groothuis# three votes for and one against." 7611315084cSEdwin Groothuis 7621315084cSEdwin Groothuis# Hawaii 76380338addSEdwin Groothuis 76480338addSEdwin Groothuis# From Arthur David Olson (2010-12-09): 76580338addSEdwin Groothuis# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 76680338addSEdwin Groothuis# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 76780338addSEdwin Groothuis# the article is available at 7688d7edd17SPhilip Paeps# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 76980338addSEdwin Groothuis# and indicates that standard time was adopted effective noon, January 77080338addSEdwin Groothuis# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 77180338addSEdwin Groothuis# saving for the period between the last Sunday of each April and the 77280338addSEdwin Groothuis# last Sunday of each September, but less than a month later repealed the 77380338addSEdwin Groothuis# act," (page 220), that year-round daylight saving time was in effect 77480338addSEdwin Groothuis# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 77580338addSEdwin Groothuis# when clocks changed) and that clocks were changed by 30 minutes 77680338addSEdwin Groothuis# effective the second Sunday of June, 1947 (page 219, with no time of 77780338addSEdwin Groothuis# day given for when clocks changed). A footnote for the 1933 changes 77880338addSEdwin Groothuis# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 77980338addSEdwin Groothuis# and Act 163 (approved 21 May 1933)." 78080338addSEdwin Groothuis 78180338addSEdwin Groothuis# From Arthur David Olson (2011-01-19): 78280338addSEdwin Groothuis# The following is from "Laws of the Territory of Hawaii Passed by the 78380338addSEdwin Groothuis# Seventeenth Legislature: Regular Session 1933," available (as of 78480338addSEdwin Groothuis# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 78580338addSEdwin Groothuis# 90...At 2 o'clock ante meridian of the last Sunday in April of each 78680338addSEdwin Groothuis# year, the standard time of this Territory shall be advanced one 78780338addSEdwin Groothuis# hour...This Act shall take effect upon its approval. Approved this 26th 78880338addSEdwin Groothuis# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 78980338addSEdwin Groothuis# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 79080338addSEdwin Groothuis# hereby repealed...This Act shall take effect upon its approval, upon 79180338addSEdwin Groothuis# which date the standard time of this Territory shall be restored to 79280338addSEdwin Groothuis# that existing immediately prior to the taking effect of said Act 90. 79380338addSEdwin Groothuis# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 79480338addSEdwin Groothuis# of the Territory of Hawaii." 7951315084cSEdwin Groothuis# 79680338addSEdwin Groothuis# Note that 1933-05-21 was a Sunday. 79780338addSEdwin Groothuis# We're left to guess the time of day when Act 163 was approved; guess noon. 79880338addSEdwin Groothuis 7992865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 8007ce0f064SEdwin GroothuisZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 8017ce0f064SEdwin Groothuis -10:30 - HST 1933 Apr 30 2:00 8027ce0f064SEdwin Groothuis -10:30 1:00 HDT 1933 May 21 12:00 803b9994124SPhilip Paeps -10:30 US H%sT 1947 Jun 8 2:00 8041315084cSEdwin Groothuis -10:00 - HST 805c26a5802SEdwin Groothuis 8061315084cSEdwin Groothuis# Now we turn to US areas that have diverged from the consensus since 1970. 8071315084cSEdwin Groothuis 8081315084cSEdwin Groothuis# Arizona mostly uses MST. 8091315084cSEdwin Groothuis 8101315084cSEdwin Groothuis# From Paul Eggert (2002-10-20): 8111315084cSEdwin Groothuis# 8121315084cSEdwin Groothuis# The information in the rest of this paragraph is derived from the 813eb1c1a05SSergey Kandaurov# Daylight Saving Time web page 814eb1c1a05SSergey Kandaurov# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 815eb1c1a05SSergey Kandaurov# maintained by the Arizona State Library, Archives and Public Records. 8161315084cSEdwin Groothuis# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 8171315084cSEdwin Groothuis# time, but by federal law railroads, airlines, bus lines, military 8181315084cSEdwin Groothuis# personnel, and some engaged in interstate commerce continued to 8191315084cSEdwin Groothuis# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 8201315084cSEdwin Groothuis# Gazette says that was the date the law changed, and that 04-01 was 8211315084cSEdwin Groothuis# the date the state's clocks would change. In 1945 the State of 8221315084cSEdwin Groothuis# Arizona used standard time all year, again with exceptions only as 8231315084cSEdwin Groothuis# mandated by federal law. Arizona observed DST in 1967, but Arizona 8241315084cSEdwin Groothuis# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 8251315084cSEdwin Groothuis# 8261315084cSEdwin Groothuis# Shanks says the 1944 experiment came to an end on 1944-03-17. 8271315084cSEdwin Groothuis# Go with the Arizona State Library instead. 8281315084cSEdwin Groothuis 8292865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 8305d56371cSPhilip PaepsZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u 8317ce0f064SEdwin Groothuis -7:00 US M%sT 1944 Jan 1 0:01 8327ce0f064SEdwin Groothuis -7:00 - MST 1944 Apr 1 0:01 8337ce0f064SEdwin Groothuis -7:00 US M%sT 1944 Oct 1 0:01 8341315084cSEdwin Groothuis -7:00 - MST 1967 8351315084cSEdwin Groothuis -7:00 US M%sT 1968 Mar 21 8361315084cSEdwin Groothuis -7:00 - MST 83793d120dbSPhilip Paeps 8381315084cSEdwin Groothuis# From Arthur David Olson (1988-02-13): 8391315084cSEdwin Groothuis# A writer from the Inter Tribal Council of Arizona, Inc., 8401315084cSEdwin Groothuis# notes in private correspondence dated 1987-12-28 that "Presently, only the 8411315084cSEdwin Groothuis# Navajo Nation participates in the Daylight Saving Time policy, due to its 8421315084cSEdwin Groothuis# large size and location in three states." (The "only" means that other 8431315084cSEdwin Groothuis# tribal nations don't use DST.) 844c26a5802SEdwin Groothuis# 845c26a5802SEdwin Groothuis# From Paul Eggert (2013-08-26): 846c26a5802SEdwin Groothuis# See America/Denver for a zone appropriate for the Navajo Nation. 8471315084cSEdwin Groothuis 8481315084cSEdwin Groothuis# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 8491315084cSEdwin Groothuis# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 8501315084cSEdwin Groothuis# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 8511315084cSEdwin Groothuis# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 8521315084cSEdwin Groothuis# Teton, Twin Falls, Valley, Washington counties, and the southern 8531315084cSEdwin Groothuis# quarter of Idaho county) and eastern Oregon (most of Malheur County) 8541315084cSEdwin Groothuis# switched four weeks late in 1974. 8551315084cSEdwin Groothuis# 8562865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 8575d56371cSPhilip PaepsZone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u 8581315084cSEdwin Groothuis -8:00 US P%sT 1923 May 13 2:00 8591315084cSEdwin Groothuis -7:00 US M%sT 1974 8601315084cSEdwin Groothuis -7:00 - MST 1974 Feb 3 2:00 8611315084cSEdwin Groothuis -7:00 US M%sT 8621315084cSEdwin Groothuis 8631315084cSEdwin Groothuis# Indiana 8641315084cSEdwin Groothuis# 8651315084cSEdwin Groothuis# For a map of Indiana's time zone regions, see: 8668d7edd17SPhilip Paeps# https://en.wikipedia.org/wiki/Time_in_Indiana 8671315084cSEdwin Groothuis# 8682c5e84ccSPhilip Paeps# From Paul Eggert (2018-11-30): 8692c5e84ccSPhilip Paeps# A brief but entertaining history of time in Indiana describes a 1949 debate 8702c5e84ccSPhilip Paeps# in the Indiana House where city legislators (who favored "fast time") 8712c5e84ccSPhilip Paeps# tussled with farm legislators (who didn't) over a bill to outlaw DST: 8722c5e84ccSPhilip Paeps# "Lacking enough votes, the city faction tries to filibuster until time runs 8732c5e84ccSPhilip Paeps# out on the session at midnight, but rural champion Rep. Herbert Copeland, 8742c5e84ccSPhilip Paeps# R-Madison, leans over the gallery railing and forces the official clock 8752c5e84ccSPhilip Paeps# back to 9 p.m., breaking it in the process. The clock sticks on 9 as the 8762c5e84ccSPhilip Paeps# debate rages on into the night. The filibuster finally dies out and the 8772c5e84ccSPhilip Paeps# bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, 8782c5e84ccSPhilip Paeps# it doesn't matter which side won. The law has no enforcement powers and 8792c5e84ccSPhilip Paeps# is simply ignored by fast-time communities." 8802c5e84ccSPhilip Paeps# How Indiana went from 'God's time' to split zones and daylight-saving. 8812c5e84ccSPhilip Paeps# Indianapolis Star. 2018-11-27 14:58 -05. 8822c5e84ccSPhilip Paeps# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ 8832c5e84ccSPhilip Paeps# 8841315084cSEdwin Groothuis# From Paul Eggert (2007-08-17): 8851315084cSEdwin Groothuis# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 8861315084cSEdwin Groothuis# with the following exceptions: 8871315084cSEdwin Groothuis# 8881315084cSEdwin Groothuis# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 889eb1c1a05SSergey Kandaurov# Vanderburgh, and Warrick counties have been like America/Chicago. 8901315084cSEdwin Groothuis# 8911315084cSEdwin Groothuis# - Dearborn and Ohio counties have been like America/New_York. 8921315084cSEdwin Groothuis# 8931315084cSEdwin Groothuis# - Clark, Floyd, and Harrison counties have been like 8941315084cSEdwin Groothuis# America/Kentucky/Louisville. 8951315084cSEdwin Groothuis# 8961315084cSEdwin Groothuis# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 8971315084cSEdwin Groothuis# and Switzerland counties have their own time zone histories as noted below. 8981315084cSEdwin Groothuis# 8991315084cSEdwin Groothuis# Shanks partitioned Indiana into 345 regions, each with its own time history, 900c26a5802SEdwin Groothuis# and wrote "Even newspaper reports present contradictory information." 9011315084cSEdwin Groothuis# Those Hoosiers! Such a flighty and changeable people! 9021315084cSEdwin Groothuis# Fortunately, most of the complexity occurred before our cutoff date of 1970. 9031315084cSEdwin Groothuis# 9041315084cSEdwin Groothuis# Other than Indianapolis, the Indiana place names are so nondescript 905c26a5802SEdwin Groothuis# that they would be ambiguous if we left them at the 'America' level. 906c26a5802SEdwin Groothuis# So we reluctantly put them all in a subdirectory 'America/Indiana'. 9071315084cSEdwin Groothuis 908eb1c1a05SSergey Kandaurov# From Paul Eggert (2014-06-26): 909eb1c1a05SSergey Kandaurov# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 910eb1c1a05SSergey Kandaurov# says "DOT is relocating the time zone boundary in Indiana to move Starke, 9111315084cSEdwin Groothuis# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 9121315084cSEdwin Groothuis# Eastern Time Zone to the Central Time Zone.... The effective date of 913eb1c1a05SSergey Kandaurov# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 9141315084cSEdwin Groothuis# changeover date from standard time to Daylight Saving Time." 915eb1c1a05SSergey Kandaurov# Strictly speaking, this meant the affected counties changed their 916eb1c1a05SSergey Kandaurov# clocks twice that night, but this obviously was in error. The intent 917eb1c1a05SSergey Kandaurov# was that 01:59:59 EST be followed by 02:00:00 CDT. 9181315084cSEdwin Groothuis 9191315084cSEdwin Groothuis# From Gwillim Law (2007-02-10): 9201315084cSEdwin Groothuis# The Associated Press has been reporting that Pulaski County, Indiana is 9211315084cSEdwin Groothuis# going to switch from Central to Eastern Time on March 11, 2007.... 9221315084cSEdwin Groothuis# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 9231315084cSEdwin Groothuis 92412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 9251315084cSEdwin GroothuisRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 9261315084cSEdwin GroothuisRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 9271315084cSEdwin GroothuisRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 9282865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 9295d56371cSPhilip PaepsZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u 9301315084cSEdwin Groothuis -6:00 US C%sT 1920 9311315084cSEdwin Groothuis -6:00 Indianapolis C%sT 1942 9321315084cSEdwin Groothuis -6:00 US C%sT 1946 9331315084cSEdwin Groothuis -6:00 Indianapolis C%sT 1955 Apr 24 2:00 9341315084cSEdwin Groothuis -5:00 - EST 1957 Sep 29 2:00 9351315084cSEdwin Groothuis -6:00 - CST 1958 Apr 27 2:00 9361315084cSEdwin Groothuis -5:00 - EST 1969 9371315084cSEdwin Groothuis -5:00 US E%sT 1971 9381315084cSEdwin Groothuis -5:00 - EST 2006 9391315084cSEdwin Groothuis -5:00 US E%sT 9401315084cSEdwin Groothuis# 9411315084cSEdwin Groothuis# Eastern Crawford County, Indiana, left its clocks alone in 1974, 9421315084cSEdwin Groothuis# as well as from 1976 through 2005. 94312a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 9441315084cSEdwin GroothuisRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 9451315084cSEdwin GroothuisRule Marengo 1951 only - Sep lastSun 2:00 0 S 9461315084cSEdwin GroothuisRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 9471315084cSEdwin GroothuisRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 9482865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 9495d56371cSPhilip PaepsZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u 9501315084cSEdwin Groothuis -6:00 US C%sT 1951 9511315084cSEdwin Groothuis -6:00 Marengo C%sT 1961 Apr 30 2:00 9521315084cSEdwin Groothuis -5:00 - EST 1969 9531315084cSEdwin Groothuis -5:00 US E%sT 1974 Jan 6 2:00 9541315084cSEdwin Groothuis -6:00 1:00 CDT 1974 Oct 27 2:00 9551315084cSEdwin Groothuis -5:00 US E%sT 1976 9561315084cSEdwin Groothuis -5:00 - EST 2006 9571315084cSEdwin Groothuis -5:00 US E%sT 9581315084cSEdwin Groothuis# 9591315084cSEdwin Groothuis# Daviess, Dubois, Knox, and Martin Counties, Indiana, 9601315084cSEdwin Groothuis# switched from eastern to central time in April 2006, then switched back 9611315084cSEdwin Groothuis# in November 2007. 96212a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 9631315084cSEdwin GroothuisRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 9641315084cSEdwin GroothuisRule Vincennes 1946 only - Sep lastSun 2:00 0 S 9651315084cSEdwin GroothuisRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 9661315084cSEdwin GroothuisRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 9671315084cSEdwin GroothuisRule Vincennes 1955 only - May 1 0:00 1:00 D 9681315084cSEdwin GroothuisRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 9691315084cSEdwin GroothuisRule Vincennes 1960 only - Oct lastSun 2:00 0 S 9701315084cSEdwin GroothuisRule Vincennes 1961 only - Sep lastSun 2:00 0 S 9711315084cSEdwin GroothuisRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 9722865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 9735d56371cSPhilip PaepsZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u 9741315084cSEdwin Groothuis -6:00 US C%sT 1946 9751315084cSEdwin Groothuis -6:00 Vincennes C%sT 1964 Apr 26 2:00 9761315084cSEdwin Groothuis -5:00 - EST 1969 9771315084cSEdwin Groothuis -5:00 US E%sT 1971 9781315084cSEdwin Groothuis -5:00 - EST 2006 Apr 2 2:00 9791315084cSEdwin Groothuis -6:00 US C%sT 2007 Nov 4 2:00 9801315084cSEdwin Groothuis -5:00 US E%sT 9811315084cSEdwin Groothuis# 9821315084cSEdwin Groothuis# Perry County, Indiana, switched from eastern to central time in April 2006. 9836b7d3b4dSPhilip Paeps# From Alois Treindl (2019-07-09): 984798c0c0bSPhilip Paeps# The Indianapolis News, Friday 27 October 1967 states that Perry County 985798c0c0bSPhilip Paeps# returned to CST. It went again to EST on 27 April 1969, as documented by the 986798c0c0bSPhilip Paeps# Indianapolis star of Saturday 26 April. 98712a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 9881315084cSEdwin GroothuisRule Perry 1955 only - May 1 0:00 1:00 D 989798c0c0bSPhilip PaepsRule Perry 1955 1960 - Sep lastSun 2:00 0 S 9901315084cSEdwin GroothuisRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 991798c0c0bSPhilip PaepsRule Perry 1961 1963 - Oct lastSun 2:00 0 S 9922865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 9935d56371cSPhilip PaepsZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u 9941315084cSEdwin Groothuis -6:00 US C%sT 1946 9951315084cSEdwin Groothuis -6:00 Perry C%sT 1964 Apr 26 2:00 996798c0c0bSPhilip Paeps -5:00 - EST 1967 Oct 29 2:00 997798c0c0bSPhilip Paeps -6:00 US C%sT 1969 Apr 27 2:00 9981315084cSEdwin Groothuis -5:00 US E%sT 1971 9991315084cSEdwin Groothuis -5:00 - EST 2006 Apr 2 2:00 10001315084cSEdwin Groothuis -6:00 US C%sT 10011315084cSEdwin Groothuis# 10021315084cSEdwin Groothuis# Pike County, Indiana moved from central to eastern time in 1977, 10031315084cSEdwin Groothuis# then switched back in 2006, then switched back again in 2007. 100412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 10051315084cSEdwin GroothuisRule Pike 1955 only - May 1 0:00 1:00 D 10061315084cSEdwin GroothuisRule Pike 1955 1960 - Sep lastSun 2:00 0 S 10071315084cSEdwin GroothuisRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 10081315084cSEdwin GroothuisRule Pike 1961 1964 - Oct lastSun 2:00 0 S 10092865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 10105d56371cSPhilip PaepsZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u 10111315084cSEdwin Groothuis -6:00 US C%sT 1955 10121315084cSEdwin Groothuis -6:00 Pike C%sT 1965 Apr 25 2:00 10131315084cSEdwin Groothuis -5:00 - EST 1966 Oct 30 2:00 10141315084cSEdwin Groothuis -6:00 US C%sT 1977 Oct 30 2:00 10151315084cSEdwin Groothuis -5:00 - EST 2006 Apr 2 2:00 10161315084cSEdwin Groothuis -6:00 US C%sT 2007 Nov 4 2:00 10171315084cSEdwin Groothuis -5:00 US E%sT 10181315084cSEdwin Groothuis# 10191315084cSEdwin Groothuis# Starke County, Indiana moved from central to eastern time in 1991, 10201315084cSEdwin Groothuis# then switched back in 2006. 10211315084cSEdwin Groothuis# From Arthur David Olson (1991-10-28): 10221315084cSEdwin Groothuis# An article on page A3 of the Sunday, 1991-10-27 Washington Post 10231315084cSEdwin Groothuis# notes that Starke County switched from Central time to Eastern time as of 10241315084cSEdwin Groothuis# 1991-10-27. 102512a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 10261315084cSEdwin GroothuisRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 10271315084cSEdwin GroothuisRule Starke 1947 1954 - Sep lastSun 2:00 0 S 10281315084cSEdwin GroothuisRule Starke 1955 1956 - Oct lastSun 2:00 0 S 10291315084cSEdwin GroothuisRule Starke 1957 1958 - Sep lastSun 2:00 0 S 10301315084cSEdwin GroothuisRule Starke 1959 1961 - Oct lastSun 2:00 0 S 10312865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 10325d56371cSPhilip PaepsZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u 10331315084cSEdwin Groothuis -6:00 US C%sT 1947 10341315084cSEdwin Groothuis -6:00 Starke C%sT 1962 Apr 29 2:00 10351315084cSEdwin Groothuis -5:00 - EST 1963 Oct 27 2:00 10361315084cSEdwin Groothuis -6:00 US C%sT 1991 Oct 27 2:00 10371315084cSEdwin Groothuis -5:00 - EST 2006 Apr 2 2:00 10381315084cSEdwin Groothuis -6:00 US C%sT 10391315084cSEdwin Groothuis# 10401315084cSEdwin Groothuis# Pulaski County, Indiana, switched from eastern to central time in 10411315084cSEdwin Groothuis# April 2006 and then switched back in March 2007. 104212a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 10431315084cSEdwin GroothuisRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 10441315084cSEdwin GroothuisRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 10451315084cSEdwin GroothuisRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 10461315084cSEdwin GroothuisRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 10472865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 10485d56371cSPhilip PaepsZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u 10491315084cSEdwin Groothuis -6:00 US C%sT 1946 10501315084cSEdwin Groothuis -6:00 Pulaski C%sT 1961 Apr 30 2:00 10511315084cSEdwin Groothuis -5:00 - EST 1969 10521315084cSEdwin Groothuis -5:00 US E%sT 1971 10531315084cSEdwin Groothuis -5:00 - EST 2006 Apr 2 2:00 10541315084cSEdwin Groothuis -6:00 US C%sT 2007 Mar 11 2:00 10551315084cSEdwin Groothuis -5:00 US E%sT 10561315084cSEdwin Groothuis# 10571315084cSEdwin Groothuis# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 10582865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 10595d56371cSPhilip PaepsZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u 10601315084cSEdwin Groothuis -6:00 US C%sT 1954 Apr 25 2:00 10611315084cSEdwin Groothuis -5:00 - EST 1969 10621315084cSEdwin Groothuis -5:00 US E%sT 1973 10631315084cSEdwin Groothuis -5:00 - EST 2006 10641315084cSEdwin Groothuis -5:00 US E%sT 10651315084cSEdwin Groothuis 106646bee4edSPhilip Paeps# From Paul Eggert (2018-03-20): 106746bee4edSPhilip Paeps# The Louisville & Nashville Railroad's 1883-11-18 change occurred at 106846bee4edSPhilip Paeps# 10:00 old local time; train were supposed to come to a standstill 106946bee4edSPhilip Paeps# for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not 107046bee4edSPhilip Paeps# clear how this matched civil time in Louisville, so for now continue 107146bee4edSPhilip Paeps# to assume Louisville switched at noon new local time, like New York. 107246bee4edSPhilip Paeps# 1073798c0c0bSPhilip Paeps# From Michael Deckers (2019-08-06): 1074798c0c0bSPhilip Paeps# From the contemporary source given by Alois Treindl, 1075798c0c0bSPhilip Paeps# the switch in Louisville on 1946-04-28 was on 00:01 1076798c0c0bSPhilip Paeps# From Paul Eggert (2019-08-26): 1077798c0c0bSPhilip Paeps# That source was the Louisville Courier-Journal, 1946-04-27, p 4. 1078798c0c0bSPhilip Paeps# Shanks gives 02:00 for all 20th-century transition times in Louisville. 1079798c0c0bSPhilip Paeps# Evidently this is wrong for spring 1946. Although also likely wrong 1080798c0c0bSPhilip Paeps# for other dates, we have no data. 1081798c0c0bSPhilip Paeps# 10821315084cSEdwin Groothuis# Part of Kentucky left its clocks alone in 1974. 10831315084cSEdwin Groothuis# This also includes Clark, Floyd, and Harrison counties in Indiana. 108412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 10851315084cSEdwin GroothuisRule Louisville 1921 only - May 1 2:00 1:00 D 10861315084cSEdwin GroothuisRule Louisville 1921 only - Sep 1 2:00 0 S 1087798c0c0bSPhilip PaepsRule Louisville 1941 only - Apr lastSun 2:00 1:00 D 10881315084cSEdwin GroothuisRule Louisville 1941 only - Sep lastSun 2:00 0 S 1089798c0c0bSPhilip PaepsRule Louisville 1946 only - Apr lastSun 0:01 1:00 D 10901315084cSEdwin GroothuisRule Louisville 1946 only - Jun 2 2:00 0 S 1091798c0c0bSPhilip PaepsRule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D 10921315084cSEdwin GroothuisRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 1093798c0c0bSPhilip PaepsRule Louisville 1956 1961 - Oct lastSun 2:00 0 S 10942865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 10955d56371cSPhilip PaepsZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u 10961315084cSEdwin Groothuis -6:00 US C%sT 1921 10971315084cSEdwin Groothuis -6:00 Louisville C%sT 1942 10981315084cSEdwin Groothuis -6:00 US C%sT 1946 10991315084cSEdwin Groothuis -6:00 Louisville C%sT 1961 Jul 23 2:00 11001315084cSEdwin Groothuis -5:00 - EST 1968 11011315084cSEdwin Groothuis -5:00 US E%sT 1974 Jan 6 2:00 11021315084cSEdwin Groothuis -6:00 1:00 CDT 1974 Oct 27 2:00 11031315084cSEdwin Groothuis -5:00 US E%sT 11041315084cSEdwin Groothuis# 11051315084cSEdwin Groothuis# Wayne County, Kentucky 11061315084cSEdwin Groothuis# 1107eb1c1a05SSergey Kandaurov# From Lake Cumberland LIFE 11087ce0f064SEdwin Groothuis# http://www.lake-cumberland.com/life/archive/news990129time.shtml 1109eb1c1a05SSergey Kandaurov# (1999-01-29) via WKYM-101.7: 11101315084cSEdwin Groothuis# Clinton County has joined Wayne County in asking the DoT to change from 11111315084cSEdwin Groothuis# the Central to the Eastern time zone.... The Wayne County government made 11121315084cSEdwin Groothuis# the same request in December. And while Russell County officials have not 11131315084cSEdwin Groothuis# taken action, the majority of respondents to a poll conducted there in 11141315084cSEdwin Groothuis# August indicated they would like to change to "fast time" also. 11151315084cSEdwin Groothuis# The three Lake Cumberland counties are the farthest east of any U.S. 11161315084cSEdwin Groothuis# location in the Central time zone. 11171315084cSEdwin Groothuis# 11181315084cSEdwin Groothuis# From Rich Wales (2000-08-29): 11191315084cSEdwin Groothuis# After prolonged debate, and despite continuing deep differences of opinion, 11201315084cSEdwin Groothuis# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 11211315084cSEdwin Groothuis# (-0500) time. They won't "fall back" this year. See Sara Shipley, 11221315084cSEdwin Groothuis# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 11231315084cSEdwin Groothuis# 11241315084cSEdwin Groothuis# From Paul Eggert (2001-07-16): 11251315084cSEdwin Groothuis# The final rule was published in the 1126eb1c1a05SSergey Kandaurov# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 11278d7edd17SPhilip Paeps# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm 11281315084cSEdwin Groothuis# 11295d56371cSPhilip PaepsZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u 11301315084cSEdwin Groothuis -6:00 US C%sT 1946 11311315084cSEdwin Groothuis -6:00 - CST 1968 11321315084cSEdwin Groothuis -6:00 US C%sT 2000 Oct 29 2:00 11331315084cSEdwin Groothuis -5:00 US E%sT 11341315084cSEdwin Groothuis 11351315084cSEdwin Groothuis 11361315084cSEdwin Groothuis# From Rives McDow (2000-08-30): 11371315084cSEdwin Groothuis# Here ... are all the changes in the US since 1985. 11381315084cSEdwin Groothuis# Kearny County, KS (put all of county on central; 11391315084cSEdwin Groothuis# previously split between MST and CST) ... 1990-10 11401315084cSEdwin Groothuis# Starke County, IN (from CST to EST) ... 1991-10 11411315084cSEdwin Groothuis# Oliver County, ND (from MST to CST) ... 1992-10 11421315084cSEdwin Groothuis# West Wendover, NV (from PST TO MST) ... 1999-10 11431315084cSEdwin Groothuis# Wayne County, KY (from CST to EST) ... 2000-10 11441315084cSEdwin Groothuis# 11451315084cSEdwin Groothuis# From Paul Eggert (2001-07-17): 11461315084cSEdwin Groothuis# We don't know where the line used to be within Kearny County, KS, 11471315084cSEdwin Groothuis# so omit that change for now. 11481315084cSEdwin Groothuis# See America/Indiana/Knox for the Starke County, IN change. 11491315084cSEdwin Groothuis# See America/North_Dakota/Center for the Oliver County, ND change. 11501315084cSEdwin Groothuis# West Wendover, NV officially switched from Pacific to mountain time on 11511315084cSEdwin Groothuis# 1999-10-31. See the 1152eb1c1a05SSergey Kandaurov# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 11538d7edd17SPhilip Paeps# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm 11541315084cSEdwin Groothuis# However, the Federal Register says that West Wendover already operated 11551315084cSEdwin Groothuis# on mountain time, and the rule merely made this official; 11561315084cSEdwin Groothuis# hence a separate tz entry is not needed. 11571315084cSEdwin Groothuis 11581315084cSEdwin Groothuis# Michigan 11591315084cSEdwin Groothuis# 11601315084cSEdwin Groothuis# From Bob Devine (1988-01-28): 11611315084cSEdwin Groothuis# Michigan didn't observe DST from 1968 to 1973. 11621315084cSEdwin Groothuis# 11631315084cSEdwin Groothuis# From Paul Eggert (1999-03-31): 11641315084cSEdwin Groothuis# Shanks writes that Michigan started using standard time on 1885-09-18, 11651315084cSEdwin Groothuis# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 11661315084cSEdwin Groothuis# that Detroit kept 11671315084cSEdwin Groothuis# 11681315084cSEdwin Groothuis# local time until 1900 when the City Council decreed that clocks should 11691315084cSEdwin Groothuis# be put back twenty-eight minutes to Central Standard Time. Half the 11701315084cSEdwin Groothuis# city obeyed, half refused. After considerable debate, the decision 11711315084cSEdwin Groothuis# was rescinded and the city reverted to Sun time. A derisive offer to 11721315084cSEdwin Groothuis# erect a sundial in front of the city hall was referred to the 11731315084cSEdwin Groothuis# Committee on Sewers. Then, in 1905, Central time was adopted 11741315084cSEdwin Groothuis# by city vote. 11751315084cSEdwin Groothuis# 11761315084cSEdwin Groothuis# This story is too entertaining to be false, so go with Howse over Shanks. 11771315084cSEdwin Groothuis# 11781315084cSEdwin Groothuis# From Paul Eggert (2001-03-06): 1179c26a5802SEdwin Groothuis# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1180c26a5802SEdwin Groothuis# one hour in 1914." This change is not in Shanks. We have no more 11811315084cSEdwin Groothuis# info, so omit this for now. 11821315084cSEdwin Groothuis# 1183798c0c0bSPhilip Paeps# From Paul Eggert (2019-07-06): 1184798c0c0bSPhilip Paeps# Due to a complicated set of legal maneuvers, in 1967 Michigan did 1185798c0c0bSPhilip Paeps# not start daylight saving time when the rest of the US did. 1186798c0c0bSPhilip Paeps# Instead, it began DST on Jun 14 at 00:01. This was big news: 1187798c0c0bSPhilip Paeps# the Detroit Free Press reported it at the top of Page 1 on 1188798c0c0bSPhilip Paeps# 1967-06-14, in an article "State Adjusting to Switch to Fast Time" 1189798c0c0bSPhilip Paeps# by Gary Blonston, above an article about Thurgood Marshall's 1190798c0c0bSPhilip Paeps# confirmation to the US Supreme Court. Although Shanks says Detroit 1191798c0c0bSPhilip Paeps# observed DST until 1967-10-29 00:01, that time of day seems to be 1192798c0c0bSPhilip Paeps# incorrect, as the Free Press later said DST ended in Michigan at the 1193798c0c0bSPhilip Paeps# same time as the rest of the US. Also, although Shanks reports no DST in 1194798c0c0bSPhilip Paeps# Detroit in 1968, it did observe DST that year; in the November 1968 1195798c0c0bSPhilip Paeps# election Michigan voters narrowly repealed DST, effective 1969. 11968d7edd17SPhilip Paeps# 11971315084cSEdwin Groothuis# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 119812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 11991315084cSEdwin GroothuisRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 12001315084cSEdwin GroothuisRule Detroit 1948 only - Sep lastSun 2:00 0 S 12012865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 12021315084cSEdwin GroothuisZone America/Detroit -5:32:11 - LMT 1905 12031315084cSEdwin Groothuis -6:00 - CST 1915 May 15 2:00 12041315084cSEdwin Groothuis -5:00 - EST 1942 12051315084cSEdwin Groothuis -5:00 US E%sT 1946 1206798c0c0bSPhilip Paeps -5:00 Detroit E%sT 1967 Jun 14 0:01 1207798c0c0bSPhilip Paeps -5:00 US E%sT 1969 1208798c0c0bSPhilip Paeps -5:00 - EST 1973 12091315084cSEdwin Groothuis -5:00 US E%sT 1975 12101315084cSEdwin Groothuis -5:00 - EST 1975 Apr 27 2:00 12111315084cSEdwin Groothuis -5:00 US E%sT 12121315084cSEdwin Groothuis# 12131315084cSEdwin Groothuis# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 12141315084cSEdwin Groothuis# switched from EST to CST/CDT in 1973. 121512a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER 12161315084cSEdwin GroothuisRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 12171315084cSEdwin GroothuisRule Menominee 1946 only - Sep lastSun 2:00 0 S 12181315084cSEdwin GroothuisRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 12191315084cSEdwin GroothuisRule Menominee 1966 only - Oct lastSun 2:00 0 S 12202865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 12211315084cSEdwin GroothuisZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 12221315084cSEdwin Groothuis -6:00 US C%sT 1946 12231315084cSEdwin Groothuis -6:00 Menominee C%sT 1969 Apr 27 2:00 12241315084cSEdwin Groothuis -5:00 - EST 1973 Apr 29 2:00 12251315084cSEdwin Groothuis -6:00 US C%sT 12261315084cSEdwin Groothuis 12271315084cSEdwin Groothuis# Navassa 12281315084cSEdwin Groothuis# administered by the US Fish and Wildlife Service 12291315084cSEdwin Groothuis# claimed by US under the provisions of the 1856 Guano Islands Act 12301315084cSEdwin Groothuis# also claimed by Haiti 12311315084cSEdwin Groothuis# occupied 1857/1900 by the Navassa Phosphate Co 12321315084cSEdwin Groothuis# US lighthouse 1917/1996-09 12331315084cSEdwin Groothuis# currently uninhabited 1234c26a5802SEdwin Groothuis# see Mark Fineman, "An Isle Rich in Guano and Discord", 12351315084cSEdwin Groothuis# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 12361315084cSEdwin Groothuis# Jimmy Skaggs, _The Great Guano Rush_ (1994). 12371315084cSEdwin Groothuis 12381315084cSEdwin Groothuis################################################################################ 12391315084cSEdwin Groothuis 12401315084cSEdwin Groothuis 1241dc135c6eSBaptiste Daroussin# From Paul Eggert (2017-02-10): 1242d61d836cSEdwin Groothuis# 1243d61d836cSEdwin Groothuis# Unless otherwise specified, the source for data through 1990 is: 12441315084cSEdwin Groothuis# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 12451315084cSEdwin Groothuis# San Diego: ACS Publications, Inc. (2003). 1246d61d836cSEdwin Groothuis# Unfortunately this book contains many errors and cites no sources. 12471315084cSEdwin Groothuis# 1248dc135c6eSBaptiste Daroussin# Many years ago Gwillim Law wrote that a good source 1249dc135c6eSBaptiste Daroussin# for time zone data was the International Air Transport 12501315084cSEdwin Groothuis# Association's Standard Schedules Information Manual (IATA SSIM), 12511315084cSEdwin Groothuis# published semiannually. Law sent in several helpful summaries 1252d61d836cSEdwin Groothuis# of the IATA's data after 1990. Except where otherwise noted, 1253d61d836cSEdwin Groothuis# IATA SSIM is the source for entries after 1990. 12541315084cSEdwin Groothuis# 12551315084cSEdwin Groothuis# Other sources occasionally used include: 12561315084cSEdwin Groothuis# 1257798c0c0bSPhilip Paeps# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1258798c0c0bSPhilip Paeps# <https://www.jstor.org/stable/1774359>. 1259798c0c0bSPhilip Paeps# 1260798c0c0bSPhilip Paeps# Pearce C. The Great Daylight Saving Time Controversy. 1261798c0c0bSPhilip Paeps# Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. 1262798c0c0bSPhilip Paeps# 12631315084cSEdwin Groothuis# Edward W. Whitman, World Time Differences, 12641315084cSEdwin Groothuis# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 12651315084cSEdwin Groothuis# which I found in the UCLA library. 12661315084cSEdwin Groothuis# 12671315084cSEdwin Groothuis# William Willett, The Waste of Daylight, 19th edition 1268ee9da7b8SEdwin Groothuis# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1269ee9da7b8SEdwin Groothuis# [PDF] (1914-03) 12701315084cSEdwin Groothuis# 12712723c7ffSPhilip Paeps# For the 1911/1912 establishment of standard time in French possessions, see: 12722723c7ffSPhilip Paeps# Société Française de Physique, Recueil de constantes physiques (1913), 12732723c7ffSPhilip Paeps# page 752, 18b. 12742723c7ffSPhilip Paeps# 1275c26a5802SEdwin Groothuis# See the 'europe' file for Greenland. 12761315084cSEdwin Groothuis 12771315084cSEdwin Groothuis# Canada 12781315084cSEdwin Groothuis 1279eb1c1a05SSergey Kandaurov# From Alain LaBonté (1994-11-14): 12801315084cSEdwin Groothuis# I post here the time zone abbreviations standardized in Canada 12811315084cSEdwin Groothuis# for both English and French in the CAN/CSA-Z234.4-89 standard.... 12821315084cSEdwin Groothuis# 1283eb1c1a05SSergey Kandaurov# UTC Standard time Daylight saving time 12841315084cSEdwin Groothuis# offset French English French English 12851315084cSEdwin Groothuis# -2:30 - - HAT NDT 12861315084cSEdwin Groothuis# -3 - - HAA ADT 12871315084cSEdwin Groothuis# -3:30 HNT NST - - 12881315084cSEdwin Groothuis# -4 HNA AST HAE EDT 12891315084cSEdwin Groothuis# -5 HNE EST HAC CDT 12901315084cSEdwin Groothuis# -6 HNC CST HAR MDT 12911315084cSEdwin Groothuis# -7 HNR MST HAP PDT 12921315084cSEdwin Groothuis# -8 HNP PST HAY YDT 12931315084cSEdwin Groothuis# -9 HNY YST - - 12941315084cSEdwin Groothuis# 12951315084cSEdwin Groothuis# HN: Heure Normale ST: Standard Time 1296eb1c1a05SSergey Kandaurov# HA: Heure Avancée DT: Daylight saving Time 12971315084cSEdwin Groothuis# 12981315084cSEdwin Groothuis# A: de l'Atlantique Atlantic 12991315084cSEdwin Groothuis# C: du Centre Central 13001315084cSEdwin Groothuis# E: de l'Est Eastern 13011315084cSEdwin Groothuis# M: Mountain 13021315084cSEdwin Groothuis# N: Newfoundland 13031315084cSEdwin Groothuis# P: du Pacifique Pacific 13041315084cSEdwin Groothuis# R: des Rocheuses 13051315084cSEdwin Groothuis# T: de Terre-Neuve 13061315084cSEdwin Groothuis# Y: du Yukon Yukon 13071315084cSEdwin Groothuis# 13081315084cSEdwin Groothuis# From Paul Eggert (1994-11-22): 13091315084cSEdwin Groothuis# Alas, this sort of thing must be handled by localization software. 13101315084cSEdwin Groothuis 13117ce0f064SEdwin Groothuis# Unless otherwise specified, the data entries for Canada are all from Shanks 13121315084cSEdwin Groothuis# & Pottenger. 13131315084cSEdwin Groothuis 13141315084cSEdwin Groothuis# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 13151315084cSEdwin Groothuis# 2007-03-01): 13161315084cSEdwin Groothuis# The British Columbia government announced yesterday that it will 13171315084cSEdwin Groothuis# adjust daylight savings next year to align with changes in the 13181315084cSEdwin Groothuis# U.S. and the rest of Canada.... 13198d7edd17SPhilip Paeps# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm 13201315084cSEdwin Groothuis# ... 13211315084cSEdwin Groothuis# Nova Scotia 13221315084cSEdwin Groothuis# Daylight saving time will be extended by four weeks starting in 2007.... 13238d7edd17SPhilip Paeps# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf 13241315084cSEdwin Groothuis# 13251315084cSEdwin Groothuis# [For New Brunswick] the new legislation dictates that the time change is to 13261315084cSEdwin Groothuis# be done at 02:00 instead of 00:01. 13278d7edd17SPhilip Paeps# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 13281315084cSEdwin Groothuis# ... 13291315084cSEdwin Groothuis# Manitoba has traditionally changed the clock every fall at 03:00. 13301315084cSEdwin Groothuis# As of 2006, the transition is to take place one hour earlier at 02:00. 13318d7edd17SPhilip Paeps# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 13321315084cSEdwin Groothuis# ... 13331315084cSEdwin Groothuis# [Alberta, Ontario, Quebec] will follow US rules. 13341315084cSEdwin Groothuis# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 13351315084cSEdwin Groothuis# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 13361315084cSEdwin Groothuis# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 13371315084cSEdwin Groothuis# ... 13381315084cSEdwin Groothuis# P.E.I. will follow US rules.... 13391315084cSEdwin Groothuis# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 13401315084cSEdwin Groothuis# ... 13411315084cSEdwin Groothuis# Province of Newfoundland and Labrador.... 13421315084cSEdwin Groothuis# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 13431315084cSEdwin Groothuis# ... 13441315084cSEdwin Groothuis# Yukon 13458d7edd17SPhilip Paeps# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 13461315084cSEdwin Groothuis# ... 13471315084cSEdwin Groothuis# N.W.T. will follow US rules. Whoever maintains the government web site 13481315084cSEdwin Groothuis# does not seem to believe in bookmarks. To see the news release, click the 13491315084cSEdwin Groothuis# following link and search for "Daylight Savings Time Change". Press the 13501315084cSEdwin Groothuis# "Daylight Savings Time Change" link; it will fire off a popup using 13511315084cSEdwin Groothuis# JavaScript. 13521315084cSEdwin Groothuis# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 13531315084cSEdwin Groothuis# ... 13541315084cSEdwin Groothuis# Nunavut 13551315084cSEdwin Groothuis# An amendment to the Interpretation Act was registered on February 19/2007.... 13561315084cSEdwin Groothuis# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 13571315084cSEdwin Groothuis 13587ce0f064SEdwin Groothuis# From Paul Eggert (2014-10-18): 13591315084cSEdwin Groothuis# H. David Matthews and Mary Vincent's map 13601315084cSEdwin Groothuis# "It's about TIME", _Canadian Geographic_ (September-October 1998) 13612723c7ffSPhilip Paeps# https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm 1362eb1c1a05SSergey Kandaurov# contains detailed boundaries for regions observing nonstandard 13631315084cSEdwin Groothuis# time and daylight saving time arrangements in Canada circa 1998. 13641315084cSEdwin Groothuis# 13657ce0f064SEdwin Groothuis# National Research Council Canada maintains info about time zones and DST. 13668d7edd17SPhilip Paeps# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 13678d7edd17SPhilip Paeps# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 13681315084cSEdwin Groothuis# Its unofficial information is often taken from Matthews and Vincent. 13691315084cSEdwin Groothuis 13701315084cSEdwin Groothuis# From Paul Eggert (2006-06-27): 13711315084cSEdwin Groothuis# For now, assume all of DST-observing Canada will fall into line with the 13721315084cSEdwin Groothuis# new US DST rules, 13731315084cSEdwin Groothuis 1374aad8a35cSEdwin Groothuis# From Chris Walton (2011-12-01) 1375aad8a35cSEdwin Groothuis# In the first of Tammy Hardwick's articles 1376aad8a35cSEdwin Groothuis# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1377aad8a35cSEdwin Groothuis# she quotes the Friday November 1/1918 edition of the Creston Review. 1378aad8a35cSEdwin Groothuis# The quote includes these two statements: 1379aad8a35cSEdwin Groothuis# 'Sunday the CPR went back to the old system of time...' 1380aad8a35cSEdwin Groothuis# '... The daylight saving scheme was dropped all over Canada at the same time,' 1381aad8a35cSEdwin Groothuis# These statements refer to a transition from daylight time to standard time 1382aad8a35cSEdwin Groothuis# that occurred nationally on Sunday October 27/1918. This transition was 1383aad8a35cSEdwin Groothuis# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1384aad8a35cSEdwin Groothuis 1385aad8a35cSEdwin Groothuis# In light of that evidence, we alter the date from the earlier believed 1386aad8a35cSEdwin Groothuis# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1387aad8a35cSEdwin Groothuis# than Thursday) in all Canadian rulesets. 1388aad8a35cSEdwin Groothuis 138912a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 13901315084cSEdwin GroothuisRule Canada 1918 only - Apr 14 2:00 1:00 D 1391aad8a35cSEdwin GroothuisRule Canada 1918 only - Oct 27 2:00 0 S 13921315084cSEdwin GroothuisRule Canada 1942 only - Feb 9 2:00 1:00 W # War 13931315084cSEdwin GroothuisRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 13941315084cSEdwin GroothuisRule Canada 1945 only - Sep 30 2:00 0 S 13951315084cSEdwin GroothuisRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 13961315084cSEdwin GroothuisRule Canada 1974 2006 - Oct lastSun 2:00 0 S 13971315084cSEdwin GroothuisRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 13981315084cSEdwin GroothuisRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 13991315084cSEdwin GroothuisRule Canada 2007 max - Nov Sun>=1 2:00 0 S 14001315084cSEdwin Groothuis 14011315084cSEdwin Groothuis 14021315084cSEdwin Groothuis# Newfoundland and Labrador 14031315084cSEdwin Groothuis 14048d7edd17SPhilip Paeps# From Paul Eggert (2017-10-14): 14058d7edd17SPhilip Paeps# Legally Labrador should observe Newfoundland time; see: 14068d7edd17SPhilip Paeps# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 14078d7edd17SPhilip Paeps# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ 14088d7edd17SPhilip Paeps# Matthews and Vincent (1998) write that the only part of Labrador 14098d7edd17SPhilip Paeps# that follows the rules is the southeast corner, including Port Hope 14108d7edd17SPhilip Paeps# Simpson and Mary's Harbour, but excluding, say, Black Tickle. 14111315084cSEdwin Groothuis 141212a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 14131315084cSEdwin GroothuisRule StJohns 1917 only - Apr 8 2:00 1:00 D 14141315084cSEdwin GroothuisRule StJohns 1917 only - Sep 17 2:00 0 S 14151315084cSEdwin Groothuis# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 14161315084cSEdwin GroothuisRule StJohns 1919 only - May 5 23:00 1:00 D 14171315084cSEdwin GroothuisRule StJohns 1919 only - Aug 12 23:00 0 S 14181315084cSEdwin Groothuis# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 14191315084cSEdwin GroothuisRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 14201315084cSEdwin GroothuisRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 14211315084cSEdwin Groothuis# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 14221315084cSEdwin Groothuis# Pottenger. 14231315084cSEdwin GroothuisRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 14241315084cSEdwin GroothuisRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 14251315084cSEdwin Groothuis# Whitman gives the following transitions: 14261315084cSEdwin Groothuis# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 14271315084cSEdwin Groothuis# but go with Shanks & Pottenger and assume they used Canadian rules. 14281315084cSEdwin Groothuis# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 14291315084cSEdwin Groothuis# Apr 30 - Sep 24; go with Shanks & Pottenger. 14301315084cSEdwin GroothuisRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 14311315084cSEdwin GroothuisRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 14321315084cSEdwin GroothuisRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 14331315084cSEdwin GroothuisRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 14341315084cSEdwin GroothuisRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 14351315084cSEdwin Groothuis# From Paul Eggert (2000-10-02): 14361315084cSEdwin Groothuis# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 14371315084cSEdwin Groothuis# at 00:01 local time. For now, assume it started in 1987. 1438958890b7SEdwin Groothuis 1439958890b7SEdwin Groothuis# From Michael Pelley (2011-09-12): 1440958890b7SEdwin Groothuis# We received today, Monday, September 12, 2011, notification that the 1441958890b7SEdwin Groothuis# changes to the Newfoundland Standard Time Act have been proclaimed. 1442958890b7SEdwin Groothuis# The change in the Act stipulates that the change from Daylight Savings 1443958890b7SEdwin Groothuis# Time to Standard Time and from Standard Time to Daylight Savings Time 1444958890b7SEdwin Groothuis# now occurs at 2:00AM. 1445958890b7SEdwin Groothuis# ... 1446958890b7SEdwin Groothuis# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1447958890b7SEdwin Groothuis# ... 1448958890b7SEdwin Groothuis# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1449958890b7SEdwin Groothuis# Office of the Chief Information Officer 1450958890b7SEdwin Groothuis# Executive Council 1451958890b7SEdwin Groothuis# Government of Newfoundland & Labrador 1452958890b7SEdwin Groothuis 14531315084cSEdwin GroothuisRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 14541315084cSEdwin GroothuisRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 14551315084cSEdwin GroothuisRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 14561315084cSEdwin GroothuisRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1457958890b7SEdwin GroothuisRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1458958890b7SEdwin GroothuisRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 14591315084cSEdwin Groothuis# 1460eebb9c2cSPhilip Paeps# St John's has an apostrophe, but POSIX file names can't have apostrophes. 14612865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 14621315084cSEdwin GroothuisZone America/St_Johns -3:30:52 - LMT 1884 14631315084cSEdwin Groothuis -3:30:52 StJohns N%sT 1918 14641315084cSEdwin Groothuis -3:30:52 Canada N%sT 1919 14651315084cSEdwin Groothuis -3:30:52 StJohns N%sT 1935 Mar 30 14661315084cSEdwin Groothuis -3:30 StJohns N%sT 1942 May 11 14671315084cSEdwin Groothuis -3:30 Canada N%sT 1946 1468958890b7SEdwin Groothuis -3:30 StJohns N%sT 2011 Nov 1469958890b7SEdwin Groothuis -3:30 Canada N%sT 14701315084cSEdwin Groothuis 14711315084cSEdwin Groothuis# most of east Labrador 14721315084cSEdwin Groothuis 1473c26a5802SEdwin Groothuis# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 14742865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 14751315084cSEdwin GroothuisZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 14761315084cSEdwin Groothuis -3:30:52 - NST 1918 14771315084cSEdwin Groothuis -3:30:52 Canada N%sT 1919 14781315084cSEdwin Groothuis -3:30:52 - NST 1935 Mar 30 14791315084cSEdwin Groothuis -3:30 - NST 1936 14801315084cSEdwin Groothuis -3:30 StJohns N%sT 1942 May 11 14811315084cSEdwin Groothuis -3:30 Canada N%sT 1946 14821315084cSEdwin Groothuis -3:30 StJohns N%sT 1966 Mar 15 2:00 1483958890b7SEdwin Groothuis -4:00 StJohns A%sT 2011 Nov 1484958890b7SEdwin Groothuis -4:00 Canada A%sT 14851315084cSEdwin Groothuis 14861315084cSEdwin Groothuis 1487dd5f96c4SPhilip Paeps# west Labrador, Nova Scotia, Prince Edward I, 1488dd5f96c4SPhilip Paeps# Îles-de-la-Madeleine, Listuguj reserve 14891315084cSEdwin Groothuis 14906790a258SEdwin Groothuis# From Brian Inglis (2015-07-20): 14916790a258SEdwin Groothuis# From the historical weather station records available at: 14926790a258SEdwin Groothuis# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 14936790a258SEdwin Groothuis# Sydney shares the same time history as Glace Bay, so was 14946790a258SEdwin Groothuis# likely to be the same across the island.... 14956790a258SEdwin Groothuis# Sydney, as the capital and most populous location, or Cape Breton, would 14966790a258SEdwin Groothuis# have been better names for the zone had we known this in 1996. 14976790a258SEdwin Groothuis 14986790a258SEdwin Groothuis# From Paul Eggert (2015-07-20): 14991315084cSEdwin Groothuis# Shanks & Pottenger write that since 1970 most of this region has been like 15001315084cSEdwin Groothuis# Halifax. Many locales did not observe peacetime DST until 1972; 15016790a258SEdwin Groothuis# the Cape Breton area, represented by Glace Bay, is the largest we know of 15026790a258SEdwin Groothuis# (Glace Bay was perhaps not the best name choice but no point changing now). 15031315084cSEdwin Groothuis# Shanks & Pottenger also write that Liverpool, NS was the only town 15041315084cSEdwin Groothuis# in Canada to observe DST in 1971 but not 1970; for now we'll assume 15051315084cSEdwin Groothuis# this is a typo. 15061315084cSEdwin Groothuis 1507dd5f96c4SPhilip Paeps# From Jeffery Nichols (2020-01-09): 1508dd5f96c4SPhilip Paeps# America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj 1509dd5f96c4SPhilip Paeps# reserve in Quebec. Officially, this came into effect on January 1, 2007 1510dd5f96c4SPhilip Paeps# (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that 1511dd5f96c4SPhilip Paeps# bill say that it is "accommodating the customs and practices" of those 1512dd5f96c4SPhilip Paeps# regions, which suggests that they have always been in-line with Halifax. 1513dd5f96c4SPhilip Paeps 151412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 15151315084cSEdwin GroothuisRule Halifax 1916 only - Apr 1 0:00 1:00 D 15161315084cSEdwin GroothuisRule Halifax 1916 only - Oct 1 0:00 0 S 15171315084cSEdwin GroothuisRule Halifax 1920 only - May 9 0:00 1:00 D 15181315084cSEdwin GroothuisRule Halifax 1920 only - Aug 29 0:00 0 S 15191315084cSEdwin GroothuisRule Halifax 1921 only - May 6 0:00 1:00 D 15201315084cSEdwin GroothuisRule Halifax 1921 1922 - Sep 5 0:00 0 S 15211315084cSEdwin GroothuisRule Halifax 1922 only - Apr 30 0:00 1:00 D 15221315084cSEdwin GroothuisRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 15231315084cSEdwin GroothuisRule Halifax 1923 only - Sep 4 0:00 0 S 15241315084cSEdwin GroothuisRule Halifax 1924 only - Sep 15 0:00 0 S 15251315084cSEdwin GroothuisRule Halifax 1925 only - Sep 28 0:00 0 S 15261315084cSEdwin GroothuisRule Halifax 1926 only - May 16 0:00 1:00 D 15271315084cSEdwin GroothuisRule Halifax 1926 only - Sep 13 0:00 0 S 15281315084cSEdwin GroothuisRule Halifax 1927 only - May 1 0:00 1:00 D 15291315084cSEdwin GroothuisRule Halifax 1927 only - Sep 26 0:00 0 S 15301315084cSEdwin GroothuisRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 15311315084cSEdwin GroothuisRule Halifax 1928 only - Sep 9 0:00 0 S 15321315084cSEdwin GroothuisRule Halifax 1929 only - Sep 3 0:00 0 S 15331315084cSEdwin GroothuisRule Halifax 1930 only - Sep 15 0:00 0 S 15341315084cSEdwin GroothuisRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 15351315084cSEdwin GroothuisRule Halifax 1932 only - May 1 0:00 1:00 D 15361315084cSEdwin GroothuisRule Halifax 1933 only - Apr 30 0:00 1:00 D 15371315084cSEdwin GroothuisRule Halifax 1933 only - Oct 2 0:00 0 S 15381315084cSEdwin GroothuisRule Halifax 1934 only - May 20 0:00 1:00 D 15391315084cSEdwin GroothuisRule Halifax 1934 only - Sep 16 0:00 0 S 15401315084cSEdwin GroothuisRule Halifax 1935 only - Jun 2 0:00 1:00 D 15411315084cSEdwin GroothuisRule Halifax 1935 only - Sep 30 0:00 0 S 15421315084cSEdwin GroothuisRule Halifax 1936 only - Jun 1 0:00 1:00 D 15431315084cSEdwin GroothuisRule Halifax 1936 only - Sep 14 0:00 0 S 15441315084cSEdwin GroothuisRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 15451315084cSEdwin GroothuisRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 15461315084cSEdwin GroothuisRule Halifax 1939 only - May 28 0:00 1:00 D 15471315084cSEdwin GroothuisRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 15481315084cSEdwin GroothuisRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 15491315084cSEdwin GroothuisRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 15501315084cSEdwin GroothuisRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 15511315084cSEdwin GroothuisRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 15521315084cSEdwin GroothuisRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 15531315084cSEdwin GroothuisRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 15541315084cSEdwin GroothuisRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 15551315084cSEdwin GroothuisRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 15562865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 15571315084cSEdwin GroothuisZone America/Halifax -4:14:24 - LMT 1902 Jun 15 15581315084cSEdwin Groothuis -4:00 Halifax A%sT 1918 15591315084cSEdwin Groothuis -4:00 Canada A%sT 1919 15601315084cSEdwin Groothuis -4:00 Halifax A%sT 1942 Feb 9 2:00s 15611315084cSEdwin Groothuis -4:00 Canada A%sT 1946 15621315084cSEdwin Groothuis -4:00 Halifax A%sT 1974 15631315084cSEdwin Groothuis -4:00 Canada A%sT 15641315084cSEdwin GroothuisZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 15651315084cSEdwin Groothuis -4:00 Canada A%sT 1953 15661315084cSEdwin Groothuis -4:00 Halifax A%sT 1954 15671315084cSEdwin Groothuis -4:00 - AST 1972 15681315084cSEdwin Groothuis -4:00 Halifax A%sT 1974 15691315084cSEdwin Groothuis -4:00 Canada A%sT 15701315084cSEdwin Groothuis 15711315084cSEdwin Groothuis# New Brunswick 15721315084cSEdwin Groothuis 15731315084cSEdwin Groothuis# From Paul Eggert (2007-01-31): 15741315084cSEdwin Groothuis# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 15751315084cSEdwin Groothuis# says they changed at 00:01 through 2006, and 15761315084cSEdwin Groothuis# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 15771315084cSEdwin Groothuis# clear that this was the case since at least 1993. 15781315084cSEdwin Groothuis# For now, assume it started in 1993. 15791315084cSEdwin Groothuis 158012a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 15811315084cSEdwin GroothuisRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 15821315084cSEdwin GroothuisRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 15831315084cSEdwin GroothuisRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 15841315084cSEdwin GroothuisRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 15851315084cSEdwin GroothuisRule Moncton 1939 only - May 27 1:00 1:00 D 15861315084cSEdwin GroothuisRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 15871315084cSEdwin GroothuisRule Moncton 1940 only - May 19 1:00 1:00 D 15881315084cSEdwin GroothuisRule Moncton 1941 only - May 4 1:00 1:00 D 15891315084cSEdwin GroothuisRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 15901315084cSEdwin GroothuisRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 15911315084cSEdwin GroothuisRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 15921315084cSEdwin GroothuisRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 15931315084cSEdwin GroothuisRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 15942865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 15951315084cSEdwin GroothuisZone America/Moncton -4:19:08 - LMT 1883 Dec 9 15961315084cSEdwin Groothuis -5:00 - EST 1902 Jun 15 15971315084cSEdwin Groothuis -4:00 Canada A%sT 1933 15981315084cSEdwin Groothuis -4:00 Moncton A%sT 1942 15991315084cSEdwin Groothuis -4:00 Canada A%sT 1946 16001315084cSEdwin Groothuis -4:00 Moncton A%sT 1973 16011315084cSEdwin Groothuis -4:00 Canada A%sT 1993 16021315084cSEdwin Groothuis -4:00 Moncton A%sT 2007 16031315084cSEdwin Groothuis -4:00 Canada A%sT 16041315084cSEdwin Groothuis 16051315084cSEdwin Groothuis# Quebec 16061315084cSEdwin Groothuis 1607dd5f96c4SPhilip Paeps# From Paul Eggert (2020-01-10): 16089f23d940SEdwin Groothuis# See America/Toronto for most of Quebec, including Montreal. 1609dd5f96c4SPhilip Paeps# See America/Halifax for the Îles de la Madeleine and the Listuguj reserve. 161094c2d487SPhilip Paeps# See America/Puerto_Rico for east of Natashquan. 16111315084cSEdwin Groothuis 16121315084cSEdwin Groothuis# Ontario 16131315084cSEdwin Groothuis 16141315084cSEdwin Groothuis# From Mark Brader (2003-07-26): 16151315084cSEdwin Groothuis# [According to the Toronto Star] Orillia, Ontario, adopted DST 16161315084cSEdwin Groothuis# effective Saturday, 1912-06-22, 22:00; the article mentions that 16171315084cSEdwin Groothuis# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 16181315084cSEdwin Groothuis# have already done so. In Orillia DST was to run until Saturday, 16191315084cSEdwin Groothuis# 1912-08-31 (no time mentioned), but it was met with considerable 16201315084cSEdwin Groothuis# hostility from certain segments of the public, and was revoked after 1621eb1c1a05SSergey Kandaurov# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 16221315084cSEdwin Groothuis# presumably that should be -07-06. (1912-06-19, -07-12; also letters 16231315084cSEdwin Groothuis# earlier in June). 16241315084cSEdwin Groothuis# 16251315084cSEdwin Groothuis# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 16268d7edd17SPhilip Paeps# 16278d7edd17SPhilip Paeps# From Paul Eggert (2017-07-08): 16288d7edd17SPhilip Paeps# For more on Orillia, see: Daubs K. Bold attempt at daylight saving 16298d7edd17SPhilip Paeps# time became a comic failure in Orillia. Toronto Star 2017-07-08. 16308d7edd17SPhilip Paeps# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html 16311315084cSEdwin Groothuis 1632f2dd838fSEdwin Groothuis# From Mark Brader (2010-03-06): 1633f2dd838fSEdwin Groothuis# 1634f2dd838fSEdwin Groothuis# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1635f2dd838fSEdwin Groothuis# right corner of page 1, it says that Toronto will return to standard 1636f2dd838fSEdwin Groothuis# time at 2 am Sunday morning (which agrees with the database), and that: 1637f2dd838fSEdwin Groothuis# 1638f2dd838fSEdwin Groothuis# The one-hour setback will go into effect throughout most of Ontario, 1639f2dd838fSEdwin Groothuis# except in areas like Windsor which remains on standard time all year. 1640f2dd838fSEdwin Groothuis# 16419142a2a3SPhilip Paeps# ... I don't know if Windsor began observing DST when Detroit did, 16429142a2a3SPhilip Paeps# or in 1974, or on some other date. 1643f2dd838fSEdwin Groothuis# 1644f2dd838fSEdwin Groothuis# By the way, the article continues by noting that: 1645f2dd838fSEdwin Groothuis# 1646f2dd838fSEdwin Groothuis# Some cities in the United States have pushed the deadline back 1647f2dd838fSEdwin Groothuis# three weeks and will change over from daylight saving in October. 1648f2dd838fSEdwin Groothuis 16492723c7ffSPhilip Paeps# From Chris Walton (2024-01-09): 16502723c7ffSPhilip Paeps# The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local 16512723c7ffSPhilip Paeps# time instead of midnight.... Toronto Daily Star - ... 16522723c7ffSPhilip Paeps# April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... 16532723c7ffSPhilip Paeps# April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... 16542723c7ffSPhilip Paeps# November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... 16552723c7ffSPhilip Paeps# September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... 16562723c7ffSPhilip Paeps# November 24, 1950 - Page 21 16572723c7ffSPhilip Paeps 1658f2dd838fSEdwin Groothuis# From Arthur David Olson (2010-07-17): 1659f2dd838fSEdwin Groothuis# 1660f2dd838fSEdwin Groothuis# "Standard Time and Time Zones in Canada" appeared in 1661f2dd838fSEdwin Groothuis# The Journal of The Royal Astronomical Society of Canada, 1662f2dd838fSEdwin Groothuis# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1663f2dd838fSEdwin Groothuis# was available at 1664f2dd838fSEdwin Groothuis# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1665f2dd838fSEdwin Groothuis# 1666f2dd838fSEdwin Groothuis# It includes the text below (starting on page 57): 1667f2dd838fSEdwin Groothuis# 1668f2dd838fSEdwin Groothuis# A list of the places in Canada using daylight saving time would 1669f2dd838fSEdwin Groothuis# require yearly revision. From information kindly furnished by 1670f2dd838fSEdwin Groothuis# the provincial governments and by the postmasters in many cities 1671f2dd838fSEdwin Groothuis# and towns, it is found that the following places used daylight sav- 1672f2dd838fSEdwin Groothuis# ing in 1930. The information for the province of Quebec is definite, 1673f2dd838fSEdwin Groothuis# for the other provinces only approximate: 1674f2dd838fSEdwin Groothuis# 1675f2dd838fSEdwin Groothuis# Province Daylight saving time used 1676f2dd838fSEdwin Groothuis# Prince Edward Island Not used. 1677f2dd838fSEdwin Groothuis# Nova Scotia In Halifax only. 1678f2dd838fSEdwin Groothuis# New Brunswick In St. John only. 1679f2dd838fSEdwin Groothuis# Quebec In the following places: 1680f2dd838fSEdwin Groothuis# Montreal Lachine 1681f2dd838fSEdwin Groothuis# Quebec Mont-Royal 1682eb1c1a05SSergey Kandaurov# Lévis Iberville 1683eb1c1a05SSergey Kandaurov# St. Lambert Cap de la Madelèine 1684f2dd838fSEdwin Groothuis# Verdun Loretteville 1685f2dd838fSEdwin Groothuis# Westmount Richmond 1686eb1c1a05SSergey Kandaurov# Outremont St. Jérôme 1687f2dd838fSEdwin Groothuis# Longueuil Greenfield Park 1688f2dd838fSEdwin Groothuis# Arvida Waterloo 1689f2dd838fSEdwin Groothuis# Chambly-Canton Beaulieu 1690f2dd838fSEdwin Groothuis# Melbourne La Tuque 1691eb1c1a05SSergey Kandaurov# St. Théophile Buckingham 1692f2dd838fSEdwin Groothuis# Ontario Used generally in the cities and towns along 1693f2dd838fSEdwin Groothuis# the southerly part of the province. Not 1694eb1c1a05SSergey Kandaurov# used in the northwesterly part. 1695f2dd838fSEdwin Groothuis# Manitoba Not used. 1696f2dd838fSEdwin Groothuis# Saskatchewan In Regina only. 1697f2dd838fSEdwin Groothuis# Alberta Not used. 1698f2dd838fSEdwin Groothuis# British Columbia Not used. 1699f2dd838fSEdwin Groothuis# 1700f2dd838fSEdwin Groothuis# With some exceptions, the use of daylight saving may be said to be limited 1701f2dd838fSEdwin Groothuis# to those cities and towns lying between Quebec city and Windsor, Ont. 1702f2dd838fSEdwin Groothuis 170312a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 17041315084cSEdwin GroothuisRule Toronto 1919 only - Mar 30 23:30 1:00 D 17051315084cSEdwin GroothuisRule Toronto 1919 only - Oct 26 0:00 0 S 17061315084cSEdwin GroothuisRule Toronto 1920 only - May 2 2:00 1:00 D 17071315084cSEdwin GroothuisRule Toronto 1920 only - Sep 26 0:00 0 S 17081315084cSEdwin GroothuisRule Toronto 1921 only - May 15 2:00 1:00 D 17091315084cSEdwin GroothuisRule Toronto 1921 only - Sep 15 2:00 0 S 17101315084cSEdwin GroothuisRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 17111315084cSEdwin Groothuis# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 17121315084cSEdwin Groothuis# was meant. 17131315084cSEdwin GroothuisRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 17141315084cSEdwin GroothuisRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 17152865ab3fSPhilip PaepsRule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 17162865ab3fSPhilip PaepsRule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 17172865ab3fSPhilip PaepsRule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 17182865ab3fSPhilip PaepsRule Toronto 1938 1939 - Sep lastSun 2:00 0 S 17192723c7ffSPhilip PaepsRule Toronto 1945 1948 - Sep lastSun 2:00 0 S 17202723c7ffSPhilip PaepsRule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D 17212723c7ffSPhilip PaepsRule Toronto 1949 1950 - Nov lastSun 2:00 0 S 17221315084cSEdwin GroothuisRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 17231315084cSEdwin Groothuis# Shanks & Pottenger say Toronto ended DST a week early in 1971, 17241315084cSEdwin Groothuis# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 17251315084cSEdwin Groothuis# is wrong, and that he had confirmed it by checking the 1971-10-30 17261315084cSEdwin Groothuis# Toronto Star, which said that DST was ending 1971-10-31 as usual. 17271315084cSEdwin GroothuisRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 17281315084cSEdwin Groothuis 17299142a2a3SPhilip Paeps# The Bahamas match Toronto since 1970. 17301315084cSEdwin Groothuis 17312865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 17321315084cSEdwin GroothuisZone America/Toronto -5:17:32 - LMT 1895 17331315084cSEdwin Groothuis -5:00 Canada E%sT 1919 17341315084cSEdwin Groothuis -5:00 Toronto E%sT 1942 Feb 9 2:00s 17351315084cSEdwin Groothuis -5:00 Canada E%sT 1946 17361315084cSEdwin Groothuis -5:00 Toronto E%sT 1974 17371315084cSEdwin Groothuis -5:00 Canada E%sT 173894c2d487SPhilip Paeps# For Atikokan see America/Panama. 17391315084cSEdwin Groothuis 17401315084cSEdwin Groothuis 17411315084cSEdwin Groothuis# Manitoba 17421315084cSEdwin Groothuis 17431315084cSEdwin Groothuis# From Rob Douglas (2006-04-06): 17441315084cSEdwin Groothuis# the old Manitoba Time Act - as amended by Bill 2, assented to 17451315084cSEdwin Groothuis# March 27, 1987 ... said ... 17461315084cSEdwin Groothuis# "between two o'clock Central Standard Time in the morning of 17471315084cSEdwin Groothuis# the first Sunday of April of each year and two o'clock Central 17481315084cSEdwin Groothuis# Standard Time in the morning of the last Sunday of October next 17491315084cSEdwin Groothuis# following, one hour in advance of Central Standard Time."... 1750eb1c1a05SSergey Kandaurov# I believe that the English legislation [of the old time act] had 17511315084cSEdwin Groothuis# been assented to (March 22, 1967).... 17521315084cSEdwin Groothuis# Also, as far as I can tell, there was no order-in-council varying 17531315084cSEdwin Groothuis# the time of Daylight Saving Time for 2005 and so the provisions of 17541315084cSEdwin Groothuis# the 1987 version would apply - the changeover was at 2:00 Central 17551315084cSEdwin Groothuis# Standard Time (i.e. not until 3:00 Central Daylight Time). 17561315084cSEdwin Groothuis 17571315084cSEdwin Groothuis# From Paul Eggert (2006-04-10): 17581315084cSEdwin Groothuis# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 17591315084cSEdwin Groothuis# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 17601315084cSEdwin Groothuis# it was also 02:00s in 1966. 17611315084cSEdwin Groothuis 176212a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 17631315084cSEdwin GroothuisRule Winn 1916 only - Apr 23 0:00 1:00 D 17641315084cSEdwin GroothuisRule Winn 1916 only - Sep 17 0:00 0 S 17651315084cSEdwin GroothuisRule Winn 1918 only - Apr 14 2:00 1:00 D 1766aad8a35cSEdwin GroothuisRule Winn 1918 only - Oct 27 2:00 0 S 17671315084cSEdwin GroothuisRule Winn 1937 only - May 16 2:00 1:00 D 17681315084cSEdwin GroothuisRule Winn 1937 only - Sep 26 2:00 0 S 17691315084cSEdwin GroothuisRule Winn 1942 only - Feb 9 2:00 1:00 W # War 17701315084cSEdwin GroothuisRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 17711315084cSEdwin GroothuisRule Winn 1945 only - Sep lastSun 2:00 0 S 17721315084cSEdwin GroothuisRule Winn 1946 only - May 12 2:00 1:00 D 17731315084cSEdwin GroothuisRule Winn 1946 only - Oct 13 2:00 0 S 17741315084cSEdwin GroothuisRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 17751315084cSEdwin GroothuisRule Winn 1947 1949 - Sep lastSun 2:00 0 S 17761315084cSEdwin GroothuisRule Winn 1950 only - May 1 2:00 1:00 D 17771315084cSEdwin GroothuisRule Winn 1950 only - Sep 30 2:00 0 S 17781315084cSEdwin GroothuisRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 17791315084cSEdwin GroothuisRule Winn 1951 1958 - Sep lastSun 2:00 0 S 17801315084cSEdwin GroothuisRule Winn 1959 only - Oct lastSun 2:00 0 S 17811315084cSEdwin GroothuisRule Winn 1960 only - Sep lastSun 2:00 0 S 17821315084cSEdwin GroothuisRule Winn 1963 only - Apr lastSun 2:00 1:00 D 17831315084cSEdwin GroothuisRule Winn 1963 only - Sep 22 2:00 0 S 17841315084cSEdwin GroothuisRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 17851315084cSEdwin GroothuisRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 17861315084cSEdwin GroothuisRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 17872865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 17881315084cSEdwin GroothuisZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 17891315084cSEdwin Groothuis -6:00 Winn C%sT 2006 17901315084cSEdwin Groothuis -6:00 Canada C%sT 17911315084cSEdwin Groothuis 17921315084cSEdwin Groothuis 17931315084cSEdwin Groothuis# Saskatchewan 17941315084cSEdwin Groothuis 17951315084cSEdwin Groothuis# From Mark Brader (2003-07-26): 17961315084cSEdwin Groothuis# The first actual adoption of DST in Canada was at the municipal 17971315084cSEdwin Groothuis# level. As the [Toronto] Star put it (1912-06-07), "While people 17981315084cSEdwin Groothuis# elsewhere have long been talking of legislation to save daylight, 17991315084cSEdwin Groothuis# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 18001315084cSEdwin Groothuis# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 18011315084cSEdwin Groothuis# presumably late evening, as below), and would run until "the end of 18021315084cSEdwin Groothuis# the summer". The discrepancy between municipal time and railroad 18031315084cSEdwin Groothuis# time was noted. 18041315084cSEdwin Groothuis 18051315084cSEdwin Groothuis# From Paul Eggert (2003-07-27): 18061315084cSEdwin Groothuis# Willett (1914-03) notes that DST "has been in operation ... in the 18071315084cSEdwin Groothuis# City of Moose Jaw, Saskatchewan, for one year." 18081315084cSEdwin Groothuis 1809798c0c0bSPhilip Paeps# From Paul Eggert (2019-07-25): 1810798c0c0bSPhilip Paeps# Pearce's book says Regina observed DST in 1914-1917. No dates and times, 18112865ab3fSPhilip Paeps# unfortunately. It also says that in 1914 Saskatoon observed DST 18122865ab3fSPhilip Paeps# from 1 June to 6 July, and that DST was also tried out in Davidson, 18132865ab3fSPhilip Paeps# Melfort, and Prince Albert. 18142865ab3fSPhilip Paeps 18151315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 18161315084cSEdwin Groothuis# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 18171315084cSEdwin Groothuis# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 18181315084cSEdwin Groothuis# Other western towns (e.g. Lloydminster) are like Edmonton. 18191315084cSEdwin Groothuis# Matthews and Vincent (1998) write that Denare Beach and Creighton 18201315084cSEdwin Groothuis# are like Winnipeg, in violation of Saskatchewan law. 18211315084cSEdwin Groothuis 18221315084cSEdwin Groothuis# From W. Jones (1992-11-06): 18231315084cSEdwin Groothuis# The. . .below is based on information I got from our law library, the 18241315084cSEdwin Groothuis# provincial archives, and the provincial Community Services department. 18251315084cSEdwin Groothuis# A precise history would require digging through newspaper archives, and 18261315084cSEdwin Groothuis# since you didn't say what you wanted, I didn't bother. 18271315084cSEdwin Groothuis# 18281315084cSEdwin Groothuis# Saskatchewan is split by a time zone meridian (105W) and over the years 18291315084cSEdwin Groothuis# the boundary became pretty ragged as communities near it reevaluated 18301315084cSEdwin Groothuis# their affiliations in one direction or the other. In 1965 a provincial 18311315084cSEdwin Groothuis# referendum favoured legislating common time practices. 18321315084cSEdwin Groothuis# 18331315084cSEdwin Groothuis# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 18341315084cSEdwin Groothuis# Saskatchewan 1978) was proclaimed, and established that the eastern 18351315084cSEdwin Groothuis# part of Saskatchewan would use CST year round, that districts in 18361315084cSEdwin Groothuis# northwest Saskatchewan would by default follow CST but could opt to 18371315084cSEdwin Groothuis# follow Mountain Time rules (thus 1 hour difference in the winter and 18381315084cSEdwin Groothuis# zero in the summer), and that districts in southwest Saskatchewan would 18391315084cSEdwin Groothuis# by default follow MT but could opt to follow CST. 18401315084cSEdwin Groothuis# 18411315084cSEdwin Groothuis# It took a few years for the dust to settle (I know one story of a town 18421315084cSEdwin Groothuis# on one time zone having its school in another, such that a mom had to 18431315084cSEdwin Groothuis# serve her family lunch in two shifts), but presently it seems that only 18441315084cSEdwin Groothuis# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 18451315084cSEdwin Groothuis# rules any more; all other districts appear to have used CST year round 18461315084cSEdwin Groothuis# since sometime in the 1960s. 18471315084cSEdwin Groothuis 18481315084cSEdwin Groothuis# From Chris Walton (2006-06-26): 18491315084cSEdwin Groothuis# The Saskatchewan time act which was last updated in 1996 is about 30 pages 18501315084cSEdwin Groothuis# long and rather painful to read. 18511315084cSEdwin Groothuis# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 18521315084cSEdwin Groothuis 185312a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 18541315084cSEdwin GroothuisRule Regina 1918 only - Apr 14 2:00 1:00 D 1855aad8a35cSEdwin GroothuisRule Regina 1918 only - Oct 27 2:00 0 S 18561315084cSEdwin GroothuisRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 18571315084cSEdwin GroothuisRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 18581315084cSEdwin GroothuisRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 18591315084cSEdwin GroothuisRule Regina 1937 only - Oct Sun>=8 0:00 0 S 18601315084cSEdwin GroothuisRule Regina 1938 only - Oct Sun>=1 0:00 0 S 18611315084cSEdwin GroothuisRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 18621315084cSEdwin GroothuisRule Regina 1942 only - Feb 9 2:00 1:00 W # War 18631315084cSEdwin GroothuisRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 18641315084cSEdwin GroothuisRule Regina 1945 only - Sep lastSun 2:00 0 S 18651315084cSEdwin GroothuisRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 18661315084cSEdwin GroothuisRule Regina 1946 only - Oct Sun>=8 2:00 0 S 18671315084cSEdwin GroothuisRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 18681315084cSEdwin GroothuisRule Regina 1947 1957 - Sep lastSun 2:00 0 S 18691315084cSEdwin GroothuisRule Regina 1959 only - Apr lastSun 2:00 1:00 D 18701315084cSEdwin GroothuisRule Regina 1959 only - Oct lastSun 2:00 0 S 18711315084cSEdwin Groothuis# 18721315084cSEdwin GroothuisRule Swift 1957 only - Apr lastSun 2:00 1:00 D 18731315084cSEdwin GroothuisRule Swift 1957 only - Oct lastSun 2:00 0 S 18741315084cSEdwin GroothuisRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 18751315084cSEdwin GroothuisRule Swift 1959 only - Oct lastSun 2:00 0 S 18761315084cSEdwin GroothuisRule Swift 1960 1961 - Sep lastSun 2:00 0 S 18772865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 18781315084cSEdwin GroothuisZone America/Regina -6:58:36 - LMT 1905 Sep 18791315084cSEdwin Groothuis -7:00 Regina M%sT 1960 Apr lastSun 2:00 18801315084cSEdwin Groothuis -6:00 - CST 18811315084cSEdwin GroothuisZone America/Swift_Current -7:11:20 - LMT 1905 Sep 18821315084cSEdwin Groothuis -7:00 Canada M%sT 1946 Apr lastSun 2:00 18831315084cSEdwin Groothuis -7:00 Regina M%sT 1950 18841315084cSEdwin Groothuis -7:00 Swift M%sT 1972 Apr lastSun 2:00 18851315084cSEdwin Groothuis -6:00 - CST 18861315084cSEdwin Groothuis 18871315084cSEdwin Groothuis 18881315084cSEdwin Groothuis# Alberta 18891315084cSEdwin Groothuis 18906b7d3b4dSPhilip Paeps# From Alois Treindl (2019-07-19): 1891798c0c0bSPhilip Paeps# There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. 1892798c0c0bSPhilip Paeps# 1969, no DST, from Edmonton Journal 18 April 1969 1893798c0c0bSPhilip Paeps# 1894798c0c0bSPhilip Paeps# From Paul Eggert (2019-07-25): 1895798c0c0bSPhilip Paeps# Pearce's book says that Alberta's 1948 Daylight Saving Act required 1896798c0c0bSPhilip Paeps# Mountain Standard Time without DST, and that "anyone who broke that law 1897798c0c0bSPhilip Paeps# could be fined up to $25 and costs". There seems to be no record of 1898798c0c0bSPhilip Paeps# anybody paying the fine. The law was not changed until an August 1971 1899798c0c0bSPhilip Paeps# plebiscite reinstituted DST in 1972. This story is also mentioned in: 1900798c0c0bSPhilip Paeps# Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. 1901798c0c0bSPhilip Paeps# ISBN 978-1459739123. 1902798c0c0bSPhilip Paeps 190312a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 19041315084cSEdwin GroothuisRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1905aad8a35cSEdwin GroothuisRule Edm 1918 only - Oct 27 2:00 0 S 19061315084cSEdwin GroothuisRule Edm 1919 only - May 27 2:00 0 S 19071315084cSEdwin GroothuisRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 19081315084cSEdwin GroothuisRule Edm 1920 only - Oct lastSun 2:00 0 S 19091315084cSEdwin GroothuisRule Edm 1921 1923 - Sep lastSun 2:00 0 S 19101315084cSEdwin GroothuisRule Edm 1942 only - Feb 9 2:00 1:00 W # War 19111315084cSEdwin GroothuisRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 19121315084cSEdwin GroothuisRule Edm 1945 only - Sep lastSun 2:00 0 S 19131315084cSEdwin GroothuisRule Edm 1947 only - Apr lastSun 2:00 1:00 D 19141315084cSEdwin GroothuisRule Edm 1947 only - Sep lastSun 2:00 0 S 19151315084cSEdwin GroothuisRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 19161315084cSEdwin GroothuisRule Edm 1972 2006 - Oct lastSun 2:00 0 S 19172865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 19181315084cSEdwin GroothuisZone America/Edmonton -7:33:52 - LMT 1906 Sep 19191315084cSEdwin Groothuis -7:00 Edm M%sT 1987 19201315084cSEdwin Groothuis -7:00 Canada M%sT 19211315084cSEdwin Groothuis 19221315084cSEdwin Groothuis 19231315084cSEdwin Groothuis# British Columbia 19241315084cSEdwin Groothuis 19251315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 19261315084cSEdwin Groothuis# Shanks & Pottenger write that since 1970 most of this region has 19271315084cSEdwin Groothuis# been like Vancouver. 19281315084cSEdwin Groothuis# Dawson Creek uses MST. Much of east BC is like Edmonton. 1929aad8a35cSEdwin Groothuis 19302d9bf4ceSEdwin Groothuis# From Matt Johnson (2015-09-21): 19312d9bf4ceSEdwin Groothuis# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 19322d9bf4ceSEdwin Groothuis# were aligned with America/Vancouver, they're now aligned with 19332d9bf4ceSEdwin Groothuis# America/Dawson_Creek. 19342d9bf4ceSEdwin Groothuis# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 19352d9bf4ceSEdwin Groothuis# 19362d9bf4ceSEdwin Groothuis# From Tim Parenti (2015-09-23): 19372d9bf4ceSEdwin Groothuis# This requires a new zone for the Northern Rockies Regional Municipality, 19382d9bf4ceSEdwin Groothuis# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 19392d9bf4ceSEdwin Groothuis# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 19402d9bf4ceSEdwin Groothuis# been on MST (-0700) like Dawson Creek since it advanced its clocks on 19412d9bf4ceSEdwin Groothuis# 2015-03-08. 19422d9bf4ceSEdwin Groothuis# 1943798c0c0bSPhilip Paeps# From Paul Eggert (2019-07-25): 19442d9bf4ceSEdwin Groothuis# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 19456b7d3b4dSPhilip Paeps# Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily 1946798c0c0bSPhilip Paeps# Province. He also cited the 1946-09-28 Victoria Daily Times, which said 1947798c0c0bSPhilip Paeps# that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, 1948798c0c0bSPhilip Paeps# guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. 1949798c0c0bSPhilip Paeps# 1950798c0c0bSPhilip Paeps# Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition 1951798c0c0bSPhilip Paeps# says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. 1952798c0c0bSPhilip Paeps# http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf 1953798c0c0bSPhilip Paeps# A catalog entry for a newspaper clipping seems to indicate that Vancouver 1954798c0c0bSPhilip Paeps# observed DST in 1941 from 07-07 through 09-27; see 1955798c0c0bSPhilip Paeps# https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 1956798c0c0bSPhilip Paeps# We have no further details, so omit them for now. 19572d9bf4ceSEdwin Groothuis 195812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 19591315084cSEdwin GroothuisRule Vanc 1918 only - Apr 14 2:00 1:00 D 1960aad8a35cSEdwin GroothuisRule Vanc 1918 only - Oct 27 2:00 0 S 19611315084cSEdwin GroothuisRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 19621315084cSEdwin GroothuisRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 19631315084cSEdwin GroothuisRule Vanc 1945 only - Sep 30 2:00 0 S 19641315084cSEdwin GroothuisRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1965798c0c0bSPhilip PaepsRule Vanc 1946 only - Sep 29 2:00 0 S 19661315084cSEdwin GroothuisRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 19671315084cSEdwin GroothuisRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 19682865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 19691315084cSEdwin GroothuisZone America/Vancouver -8:12:28 - LMT 1884 19701315084cSEdwin Groothuis -8:00 Vanc P%sT 1987 19711315084cSEdwin Groothuis -8:00 Canada P%sT 19721315084cSEdwin GroothuisZone America/Dawson_Creek -8:00:56 - LMT 1884 19731315084cSEdwin Groothuis -8:00 Canada P%sT 1947 19741315084cSEdwin Groothuis -8:00 Vanc P%sT 1972 Aug 30 2:00 19751315084cSEdwin Groothuis -7:00 - MST 19762d9bf4ceSEdwin GroothuisZone America/Fort_Nelson -8:10:47 - LMT 1884 19772d9bf4ceSEdwin Groothuis -8:00 Vanc P%sT 1946 19782d9bf4ceSEdwin Groothuis -8:00 - PST 1947 19792d9bf4ceSEdwin Groothuis -8:00 Vanc P%sT 1987 19802d9bf4ceSEdwin Groothuis -8:00 Canada P%sT 2015 Mar 8 2:00 19812d9bf4ceSEdwin Groothuis -7:00 - MST 198294c2d487SPhilip Paeps# For Creston see America/Phoenix. 19831315084cSEdwin Groothuis 19841315084cSEdwin Groothuis# Northwest Territories, Nunavut, Yukon 19851315084cSEdwin Groothuis 1986cf1ad535SPhilip Paeps# From Chris Walton (2022-11-06): 1987cf1ad535SPhilip Paeps# Whitehorse Star - Thursday April 22, 1965 - page 1 1988cf1ad535SPhilip Paeps# title: DST Starts Monday ... 1989cf1ad535SPhilip Paeps# https://www.newspapers.com/image/578587481/ 1990cf1ad535SPhilip Paeps# The title of this first article is wrong and/or misleading. 1991cf1ad535SPhilip Paeps# Also, the start time shown in the article is vague; it simply says "after 1992cf1ad535SPhilip Paeps# midnight" when it probably should have stated 2:00a.m.... 1993cf1ad535SPhilip Paeps# 1994cf1ad535SPhilip Paeps# Whitehorse Star - Monday October 25, 1965 - page 15 ... 1995cf1ad535SPhilip Paeps# https://www.newspapers.com/image/578589147/ 1996cf1ad535SPhilip Paeps# The 1965 Yukon Council minutes can be found here: 1997cf1ad535SPhilip Paeps# http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf 1998cf1ad535SPhilip Paeps# ... I do not currently believe that NWT touched any of its clocks in 1965.... 1999cf1ad535SPhilip Paeps# 2000cf1ad535SPhilip Paeps# Whitehorse Star - Thursday Feb 24,1966 - page 2 2001cf1ad535SPhilip Paeps# title: It's Time for YDT ... 2002cf1ad535SPhilip Paeps# https://www.newspapers.com/image/578575979/ ... 2003cf1ad535SPhilip Paeps# America/Whitehorse as a permanent change from UTC-9(YST) to 2004cf1ad535SPhilip Paeps# UTC-8(PST) at 00:00 on Sunday February 27, 1966.... 2005cf1ad535SPhilip Paeps# 2006cf1ad535SPhilip Paeps# Whitehorse Star - Friday April 28,1972 - page 6 2007cf1ad535SPhilip Paeps# title: Daylight Saving Time for N.W.T.... 2008cf1ad535SPhilip Paeps# https://www.newspapers.com/image/578701610/ ... 2009cf1ad535SPhilip Paeps# Nunavut and NWT zones ... DST starting in 1972.... Start and End ... 2010cf1ad535SPhilip Paeps# should be the same as the rest of Canada 2011cf1ad535SPhilip Paeps# 2012cf1ad535SPhilip Paeps# 2013cf1ad535SPhilip Paeps# From Paul Eggert (2022-11-06): 2014cf1ad535SPhilip Paeps# For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this 2015cf1ad535SPhilip Paeps# seems likely than 02:00 -> 04:00 and matches "after midnight". 2016cf1ad535SPhilip Paeps 20171315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 20181315084cSEdwin Groothuis# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 20191315084cSEdwin Groothuis# Mathew Englander (1996-10-07) gives the following refs: 20201315084cSEdwin Groothuis# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 2021abdc8d91SEdwin Groothuis# c. 7 defines Yukon standard time as UTC-9.... 20221315084cSEdwin Groothuis# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 20238d7edd17SPhilip Paeps# [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] 20241315084cSEdwin Groothuis# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 20251315084cSEdwin Groothuis# * O.I.C. 1980/02 established DST. 20261315084cSEdwin Groothuis# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 2027abdc8d91SEdwin Groothuis 2028abdc8d91SEdwin Groothuis# From Brian Inglis (2015-04-14): 2029abdc8d91SEdwin Groothuis# 2030abdc8d91SEdwin Groothuis# I tried to trace the history of Yukon time and found the following 2031abdc8d91SEdwin Groothuis# regulations, giving the reference title and URL if found, regulation name, 2032abdc8d91SEdwin Groothuis# and relevant quote if available. Each regulation specifically revokes its 2033abdc8d91SEdwin Groothuis# predecessor. The final reference is to the current Interpretation Act 2034abdc8d91SEdwin Groothuis# authorizing and resulting from these regulatory changes. 2035abdc8d91SEdwin Groothuis# 2036abdc8d91SEdwin Groothuis# Only recent regulations were retrievable via Yukon government site search or 2037abdc8d91SEdwin Groothuis# index, and only some via Canadian legal sources. Other sources used include 2038abdc8d91SEdwin Groothuis# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 2039abdc8d91SEdwin Groothuis# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 2040abdc8d91SEdwin Groothuis# 1970 quoted below; each article includes current extracts from provincial 2041abdc8d91SEdwin Groothuis# and territorial ST and DST regulations at the end, summaries and details of 2042abdc8d91SEdwin Groothuis# standard times and daylight saving time at many locations across Canada, 2043abdc8d91SEdwin Groothuis# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 2044abdc8d91SEdwin Groothuis# and LMST; they also cover many countries and global locations, with a chart 2045abdc8d91SEdwin Groothuis# and table showing current Universal Time offsets, and may be useful as 2046abdc8d91SEdwin Groothuis# another source of information for 1970 and earlier. 2047abdc8d91SEdwin Groothuis# 2048abdc8d91SEdwin Groothuis# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 2049abdc8d91SEdwin Groothuis# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 2050abdc8d91SEdwin Groothuis# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 2051abdc8d91SEdwin Groothuis# Yukon Interpretation Ordinance 2052abdc8d91SEdwin Groothuis# Yukon standard time is the local mean time at the one hundred and 2053abdc8d91SEdwin Groothuis# thirty-fifth meridian. 2054abdc8d91SEdwin Groothuis# 2055abdc8d91SEdwin Groothuis# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 2056abdc8d91SEdwin Groothuis# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 2057abdc8d91SEdwin Groothuis# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 2058abdc8d91SEdwin Groothuis# Yukon Interpretation Ordinance, 1955, Chap. 16. 2059abdc8d91SEdwin Groothuis# 2060abdc8d91SEdwin Groothuis# (1) Subject to this section, standard time shall be reckoned as nine 2061abdc8d91SEdwin Groothuis# hours behind Greenwich Time and called Yukon Standard Time. 2062abdc8d91SEdwin Groothuis# 2063abdc8d91SEdwin Groothuis# (2) Notwithstanding subsection (1), the Commissioner may make regulations 2064abdc8d91SEdwin Groothuis# varying the manner of reckoning standard time. 2065abdc8d91SEdwin Groothuis# 2066abdc8d91SEdwin Groothuis# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 20672865ab3fSPhilip Paeps# [no online source found] 2068abdc8d91SEdwin Groothuis# 2069abdc8d91SEdwin Groothuis# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2070abdc8d91SEdwin Groothuis# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2071abdc8d91SEdwin Groothuis# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2072abdc8d91SEdwin Groothuis# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2073abdc8d91SEdwin Groothuis# 2074abdc8d91SEdwin Groothuis# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2075abdc8d91SEdwin Groothuis# Territory on 27th January, 1966, is hereby revoked. 2076abdc8d91SEdwin Groothuis# 2077abdc8d91SEdwin Groothuis# 2. Yukon (East) Standard Time as defined by section 36 of the 2078abdc8d91SEdwin Groothuis# Interpretation Ordinance from and after mid-night on the 28th day of May, 2079abdc8d91SEdwin Groothuis# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2080abdc8d91SEdwin Groothuis# is to say, eight hours behind Greenwich Time in the area of the Yukon 2081abdc8d91SEdwin Groothuis# Territory lying east of the 138th degree longitude west. 2082abdc8d91SEdwin Groothuis# 2083abdc8d91SEdwin Groothuis# 3. In the remainder of the Territory, lying west of the 138th degree 2084abdc8d91SEdwin Groothuis# longitude west, Yukon (West) Standard Time shall be reckoned as nine 2085abdc8d91SEdwin Groothuis# hours behind Greenwich Time. 2086abdc8d91SEdwin Groothuis# 2087abdc8d91SEdwin Groothuis# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 20888d7edd17SPhilip Paeps# https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2089abdc8d91SEdwin Groothuis# C.O. 1973/214 INTERPRETATION ACT ... 2090abdc8d91SEdwin Groothuis# 2091abdc8d91SEdwin Groothuis# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2092abdc8d91SEdwin Groothuis# revoked. 2093abdc8d91SEdwin Groothuis# 2094abdc8d91SEdwin Groothuis# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2095abdc8d91SEdwin Groothuis# Act from and after midnight on the twenty-eighth day of October, 1973 2096abdc8d91SEdwin Groothuis# shall be reckoned in the same manner as Pacific Standard Time, that is 2097abdc8d91SEdwin Groothuis# to say eight hours behind Greenwich Time. 2098abdc8d91SEdwin Groothuis# 2099abdc8d91SEdwin Groothuis# * O.I.C. 1980/02 INTERPRETATION ACT 2100dc505d53SPhilip Paeps# https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf 2101abdc8d91SEdwin Groothuis# 2102abdc8d91SEdwin Groothuis# * Yukon Daylight Saving Time, YOIC 1987/56 21038d7edd17SPhilip Paeps# https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2104abdc8d91SEdwin Groothuis# O.I.C. 1987/056 INTERPRETATION ACT ... 2105abdc8d91SEdwin Groothuis# 2106abdc8d91SEdwin Groothuis# In every year between 2107abdc8d91SEdwin Groothuis# (a) two o'clock in the morning in the first Sunday in April, and 2108abdc8d91SEdwin Groothuis# (b) two o'clock in the morning in the last Sunday in October, 2109abdc8d91SEdwin Groothuis# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2110abdc8d91SEdwin Groothuis# called Yukon Daylight Saving Time. 2111abdc8d91SEdwin Groothuis# ... 2112abdc8d91SEdwin Groothuis# Dated ... 9th day of March, A.D., 1987. 2113abdc8d91SEdwin Groothuis# 2114abdc8d91SEdwin Groothuis# * Yukon Daylight Saving Time 2006, YOIC 2006/127 21158d7edd17SPhilip Paeps# https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2116abdc8d91SEdwin Groothuis# O.I.C. 2006/127 INTERPRETATION ACT ... 2117abdc8d91SEdwin Groothuis# 2118abdc8d91SEdwin Groothuis# 1. In Yukon each year the time for general purposes shall be 7 hours 2119abdc8d91SEdwin Groothuis# behind Greenwich mean time during the period commencing at two o'clock 2120abdc8d91SEdwin Groothuis# in the forenoon on the second Sunday of March and ending at two o'clock 2121abdc8d91SEdwin Groothuis# in the forenoon on the first Sunday of November and shall be called 2122abdc8d91SEdwin Groothuis# Yukon Daylight Saving Time. 2123abdc8d91SEdwin Groothuis# 2124abdc8d91SEdwin Groothuis# 2. Order-in-Council 1987/56 is revoked. 2125abdc8d91SEdwin Groothuis# 2126abdc8d91SEdwin Groothuis# 3. This order comes into force January 1, 2007. 2127abdc8d91SEdwin Groothuis# 2128abdc8d91SEdwin Groothuis# * Interpretation Act, RSY 2002, c 125 21298d7edd17SPhilip Paeps# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 21301315084cSEdwin Groothuis 2131cf1ad535SPhilip Paeps# From Chris Walton (2022-11-06): 2132cf1ad535SPhilip Paeps# The 5th edition of the Atlas of Canada contains a time zone map that 2133cf1ad535SPhilip Paeps# shows both legislated and observed time zone boundaries. 2134cf1ad535SPhilip Paeps# All communities on Baffin Island are shown to be observing Eastern time. 2135cf1ad535SPhilip Paeps# The date on the map is 1984. 2136cf1ad535SPhilip Paeps# https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf 2137cf1ad535SPhilip Paeps 21381315084cSEdwin Groothuis# From Rives McDow (1999-09-04): 21391315084cSEdwin Groothuis# Nunavut ... moved ... to incorporate the whole territory into one time zone. 21401315084cSEdwin Groothuis# Nunavut moves to single time zone Oct. 31 21417ce0f064SEdwin Groothuis# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 21421315084cSEdwin Groothuis 21431315084cSEdwin Groothuis# From Paul Eggert (1999-09-20): 21441315084cSEdwin Groothuis# Basic Facts: The New Territory 21457ce0f064SEdwin Groothuis# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2146cf1ad535SPhilip Paeps# (1999) reports that ... Coral Harbour does not observe DST. 21471315084cSEdwin Groothuis 21481315084cSEdwin Groothuis# From Paul Eggert (2000-10-02): 21491315084cSEdwin Groothuis# Matthews and Vincent (1998) say the following, but we lack histories 21501315084cSEdwin Groothuis# for these potential new Zones. 21511315084cSEdwin Groothuis# 21521315084cSEdwin Groothuis# The Canadian Forces station at Alert uses Eastern Time while the 21531315084cSEdwin Groothuis# handful of residents at the Eureka weather station [in the Central 21541315084cSEdwin Groothuis# zone] skip daylight savings. Baffin Island, which is crossed by the 21551315084cSEdwin Groothuis# Central, Eastern and Atlantic Time zones only uses Eastern Time. 21561315084cSEdwin Groothuis# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 21571315084cSEdwin Groothuis# Central Time and Southampton Island [in the Central zone] is not 21581315084cSEdwin Groothuis# required to use daylight savings. 21591315084cSEdwin Groothuis 21608d7edd17SPhilip Paeps# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html> 2161eb1c1a05SSergey Kandaurov# Nunavut now has two time zones (2000-11-10): 21621315084cSEdwin Groothuis# The Nunavut government would allow its employees in Kugluktuk and 21631315084cSEdwin Groothuis# Cambridge Bay to operate on central time year-round, putting them 21641315084cSEdwin Groothuis# one hour behind the rest of Nunavut for six months during the winter. 21651315084cSEdwin Groothuis# At the end of October the two communities had rebelled against 21661315084cSEdwin Groothuis# Nunavut's unified time zone, refusing to shift to eastern time with 21671315084cSEdwin Groothuis# the rest of the territory for the winter. Cambridge Bay remained on 21681315084cSEdwin Groothuis# central time, while Kugluktuk, even farther west, reverted to 21691315084cSEdwin Groothuis# mountain time, which they had used before the advent of Nunavut's 21701315084cSEdwin Groothuis# unified time zone in 1999. 21711315084cSEdwin Groothuis# 21721315084cSEdwin Groothuis# From Rives McDow (2001-01-20), quoting the Nunavut government: 21731315084cSEdwin Groothuis# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 21741315084cSEdwin Groothuis 21751315084cSEdwin Groothuis# From Paul Eggert (2000-12-04): 21761315084cSEdwin Groothuis# Let's just keep track of the official times for now. 21771315084cSEdwin Groothuis 21781315084cSEdwin Groothuis# From Rives McDow (2001-03-07): 21791315084cSEdwin Groothuis# The premier of Nunavut has issued a ministerial statement advising 21801315084cSEdwin Groothuis# that effective 2001-04-01, the territory of Nunavut will revert 21811315084cSEdwin Groothuis# back to three time zones (mountain, central, and eastern). Of the 21821315084cSEdwin Groothuis# cities in Nunavut, Coral Harbor is the only one that I know of that 21831315084cSEdwin Groothuis# has said it will not observe dst, staying on EST year round. I'm 21841315084cSEdwin Groothuis# checking for more info, and will get back to you if I come up with 21851315084cSEdwin Groothuis# more. 21861315084cSEdwin Groothuis# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 21871315084cSEdwin Groothuis 21881315084cSEdwin Groothuis# From Gwillim Law (2005-05-21): 21897ce0f064SEdwin Groothuis# According to ... 21901315084cSEdwin Groothuis# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 21911315084cSEdwin Groothuis# (from a 1998 Canadian Geographic article), the de facto and de jure time 21921315084cSEdwin Groothuis# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 21931315084cSEdwin Groothuis# round. Using Google, it's easy to find other websites that confirm this. 21941315084cSEdwin Groothuis# I wasn't able to find how far back this time regimen goes, but since it 21951315084cSEdwin Groothuis# predates the creation of Nunavut, it probably goes back many years.... 21961315084cSEdwin Groothuis# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 21971315084cSEdwin Groothuis# 21987ce0f064SEdwin Groothuis# From Paul Eggert (2014-10-17): 21991315084cSEdwin Groothuis# For lack of better information, assume that Southampton Island observed 22007ce0f064SEdwin Groothuis# daylight saving only during wartime. Gwillim Law's email also 22017ce0f064SEdwin Groothuis# mentioned maps now maintained by National Research Council Canada; 22027ce0f064SEdwin Groothuis# see above for an up-to-date link. 22031315084cSEdwin Groothuis 22041315084cSEdwin Groothuis# From Chris Walton (2007-03-01): 22051315084cSEdwin Groothuis# ... the community of Resolute (located on Cornwallis Island in 22061315084cSEdwin Groothuis# Nunavut) moved from Central Time to Eastern Time last November. 22071315084cSEdwin Groothuis# Basically the community did not change its clocks at the end of 22081315084cSEdwin Groothuis# daylight saving.... 22091315084cSEdwin Groothuis# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 22101315084cSEdwin Groothuis 2211958890b7SEdwin Groothuis# From Chris Walton (2011-03-21): 2212958890b7SEdwin Groothuis# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2213958890b7SEdwin Groothuis# Bay. Resolute Bay is a small community located about 900km north of 2214958890b7SEdwin Groothuis# the Arctic Circle. The zone file was required because Resolute Bay had 2215958890b7SEdwin Groothuis# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 22161315084cSEdwin Groothuis# 2217958890b7SEdwin Groothuis# According to new information which I received last week, Resolute Bay 2218958890b7SEdwin Groothuis# went back to using UTC-6 in the winter of 2007-2008... 2219958890b7SEdwin Groothuis# 2220958890b7SEdwin Groothuis# On March 11/2007 most of Canada went onto daylight saving. On March 2221958890b7SEdwin Groothuis# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2222958890b7SEdwin Groothuis# talked to somebody that was both knowledgeable and helpful. I was able 2223958890b7SEdwin Groothuis# to confirm that Resolute Bay was still operating on UTC-5. It was 2224958890b7SEdwin Groothuis# explained to me that Resolute Bay had been on the Eastern Time zone 2225958890b7SEdwin Groothuis# (EST) in the winter, and was now back on the Central Time zone (CDT). 2226958890b7SEdwin Groothuis# i.e. the time zone had changed twice in the last year but the clocks 2227958890b7SEdwin Groothuis# had not moved. The residents had to know which time zone they were in 2228958890b7SEdwin Groothuis# so they could follow the correct TV schedule... 2229958890b7SEdwin Groothuis# 2230958890b7SEdwin Groothuis# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2231958890b7SEdwin Groothuis# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2232958890b7SEdwin Groothuis# of the phone call, I decided to seek out an alternate source of 2233958890b7SEdwin Groothuis# information. I found an e-mail address for somebody by the name of 2234958890b7SEdwin Groothuis# Stephanie Adams whose job was listed as "Inns North Support Officer for 2235958890b7SEdwin Groothuis# Arctic Co-operatives." I was under the impression that Stephanie lived 2236958890b7SEdwin Groothuis# and worked in Resolute Bay... 2237958890b7SEdwin Groothuis# 2238958890b7SEdwin Groothuis# On March 14/2011 I phoned the hamlet office again. I was told that 2239958890b7SEdwin Groothuis# Resolute Bay had been using Central Standard Time over the winter of 2240958890b7SEdwin Groothuis# 2010-2011 and that the clocks had therefore been moved one hour ahead 2241958890b7SEdwin Groothuis# on March 13/2011. The person I talked to was aware that Resolute Bay 2242958890b7SEdwin Groothuis# had previously experimented with Eastern Standard Time but he could not 2243958890b7SEdwin Groothuis# tell me when the practice had stopped. 2244958890b7SEdwin Groothuis# 2245958890b7SEdwin Groothuis# On March 17/2011 I searched the Web to find an e-mail address of 2246958890b7SEdwin Groothuis# somebody that might be able to tell me exactly when Resolute Bay went 2247958890b7SEdwin Groothuis# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2248958890b7SEdwin Groothuis# used to be the mayor of Resolute Bay and he apparently owns half the 2249958890b7SEdwin Groothuis# businesses including "South Camp Inn." This website has some info on 2250958890b7SEdwin Groothuis# Aziz: 2251958890b7SEdwin Groothuis# http://www.uphere.ca/node/493 2252958890b7SEdwin Groothuis# 2253958890b7SEdwin Groothuis# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2254958890b7SEdwin Groothuis# Eastern Standard Time. 2255958890b7SEdwin Groothuis# 2256958890b7SEdwin Groothuis# Aziz responded quickly with this: "hi, The time was not changed for the 2257958890b7SEdwin Groothuis# 1 year only, the following year, the community went back to the old way 2258958890b7SEdwin Groothuis# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2259958890b7SEdwin Groothuis# the winter Zulu plus 6 hrs" 2260958890b7SEdwin Groothuis# 2261958890b7SEdwin Groothuis# This of course conflicted with everything I had ascertained in November 2008. 2262958890b7SEdwin Groothuis# 2263958890b7SEdwin Groothuis# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2264958890b7SEdwin Groothuis# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2265958890b7SEdwin Groothuis# may want to check with the weather office in Resolute Bay or do a 2266958890b7SEdwin Groothuis# search on the weather through Env. Canada. web site" 2267958890b7SEdwin Groothuis# 2268958890b7SEdwin Groothuis# If I had realized the Stephanie did not live in Resolute Bay I would 2269958890b7SEdwin Groothuis# never have contacted her. I now believe that all the information I 2270958890b7SEdwin Groothuis# obtained in November 2008 should be ignored... 2271958890b7SEdwin Groothuis# I apologize for reporting incorrect information in 2008. 22721315084cSEdwin Groothuis 2273dd5f96c4SPhilip Paeps# From Tim Parenti (2020-03-05): 2274dd5f96c4SPhilip Paeps# The government of Yukon announced [yesterday] the cessation of seasonal time 2275dd5f96c4SPhilip Paeps# changes. "After clocks are pushed ahead one hour on March 8, the territory 2276dd5f96c4SPhilip Paeps# will remain on [UTC-07]. ... [The government] found 93 per cent of 2277dd5f96c4SPhilip Paeps# respondents wanted to end seasonal time changes and, of that group, 70 per 2278dd5f96c4SPhilip Paeps# cent wanted 'permanent Pacific Daylight Saving Time.'" 2279dd5f96c4SPhilip Paeps# https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358 2280dd5f96c4SPhilip Paeps# 2281dd5f96c4SPhilip Paeps# Although the government press release prefers PDT, we prefer MST for 2282dd5f96c4SPhilip Paeps# consistency with nearby Dawson Creek, Creston, and Fort Nelson. 2283dd5f96c4SPhilip Paeps# https://yukon.ca/en/news/yukon-end-seasonal-time-change 2284dd5f96c4SPhilip Paeps 228512a899b6SPhilip Paeps# From Andrew G. Smith (2020-09-24): 228612a899b6SPhilip Paeps# Yukon has completed its regulatory change to be on UTC -7 year-round.... 228712a899b6SPhilip Paeps# http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf 228812a899b6SPhilip Paeps# What we have done is re-defined Yukon Standard Time, as we are 228912a899b6SPhilip Paeps# authorized to do under section 33 of our Interpretation Act: 229012a899b6SPhilip Paeps# http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf 229112a899b6SPhilip Paeps# 229212a899b6SPhilip Paeps# From Paul Eggert (2020-09-24): 229312a899b6SPhilip Paeps# tzdb uses the obsolete YST abbreviation for standard time in Yukon through 229412a899b6SPhilip Paeps# about 1970, and uses PST for standard time in Yukon since then. Consistent 229512a899b6SPhilip Paeps# with that, use MST for -07, the new standard time in Yukon effective Nov. 1. 229612a899b6SPhilip Paeps 229712a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 22981315084cSEdwin GroothuisRule NT_YK 1918 only - Apr 14 2:00 1:00 D 22991315084cSEdwin GroothuisRule NT_YK 1918 only - Oct 27 2:00 0 S 23001315084cSEdwin GroothuisRule NT_YK 1919 only - May 25 2:00 1:00 D 23011315084cSEdwin GroothuisRule NT_YK 1919 only - Nov 1 0:00 0 S 23021315084cSEdwin GroothuisRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 23031315084cSEdwin GroothuisRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 23041315084cSEdwin GroothuisRule NT_YK 1945 only - Sep 30 2:00 0 S 2305cf1ad535SPhilip PaepsRule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D 2306cf1ad535SPhilip PaepsRule NT_YK 1972 2006 - Oct lastSun 2:00 0 S 23071315084cSEdwin GroothuisRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2308cf1ad535SPhilip PaepsRule Yukon 1965 only - Apr lastSun 0:00 2:00 DD 2309cf1ad535SPhilip PaepsRule Yukon 1965 only - Oct lastSun 2:00 0 S 23102865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 23111315084cSEdwin Groothuis# formerly Frobisher Bay 23128fdf5721SBaptiste DaroussinZone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 23131315084cSEdwin Groothuis -5:00 NT_YK E%sT 1999 Oct 31 2:00 23141315084cSEdwin Groothuis -6:00 Canada C%sT 2000 Oct 29 2:00 23151315084cSEdwin Groothuis -5:00 Canada E%sT 23161315084cSEdwin Groothuis# aka Qausuittuq 23178fdf5721SBaptiste DaroussinZone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 23181315084cSEdwin Groothuis -6:00 NT_YK C%sT 2000 Oct 29 2:00 23191315084cSEdwin Groothuis -5:00 - EST 2001 Apr 1 3:00 23201315084cSEdwin Groothuis -6:00 Canada C%sT 2006 Oct 29 2:00 2321958890b7SEdwin Groothuis -5:00 - EST 2007 Mar 11 3:00 2322958890b7SEdwin Groothuis -6:00 Canada C%sT 23231315084cSEdwin Groothuis# aka Kangiqiniq 23248fdf5721SBaptiste DaroussinZone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 23251315084cSEdwin Groothuis -6:00 NT_YK C%sT 2000 Oct 29 2:00 23261315084cSEdwin Groothuis -5:00 - EST 2001 Apr 1 3:00 23271315084cSEdwin Groothuis -6:00 Canada C%sT 23281315084cSEdwin Groothuis# aka Iqaluktuuttiaq 23298fdf5721SBaptiste DaroussinZone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 23301315084cSEdwin Groothuis -7:00 NT_YK M%sT 1999 Oct 31 2:00 23311315084cSEdwin Groothuis -6:00 Canada C%sT 2000 Oct 29 2:00 23321315084cSEdwin Groothuis -5:00 - EST 2000 Nov 5 0:00 23331315084cSEdwin Groothuis -6:00 - CST 2001 Apr 1 3:00 23341315084cSEdwin Groothuis -7:00 Canada M%sT 23358fdf5721SBaptiste DaroussinZone America/Inuvik 0 - -00 1953 # Inuvik founded 23361315084cSEdwin Groothuis -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 23371315084cSEdwin Groothuis -7:00 NT_YK M%sT 1980 23381315084cSEdwin Groothuis -7:00 Canada M%sT 23391315084cSEdwin GroothuisZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2340cf1ad535SPhilip Paeps -9:00 NT_YK Y%sT 1965 2341cf1ad535SPhilip Paeps -9:00 Yukon Y%sT 1966 Feb 27 0:00 2342cf1ad535SPhilip Paeps -8:00 - PST 1980 234312a899b6SPhilip Paeps -8:00 Canada P%sT 2020 Nov 1 2344dd5f96c4SPhilip Paeps -7:00 - MST 23451315084cSEdwin GroothuisZone America/Dawson -9:17:40 - LMT 1900 Aug 20 2346cf1ad535SPhilip Paeps -9:00 NT_YK Y%sT 1965 2347cf1ad535SPhilip Paeps -9:00 Yukon Y%sT 1973 Oct 28 0:00 2348cf1ad535SPhilip Paeps -8:00 - PST 1980 234912a899b6SPhilip Paeps -8:00 Canada P%sT 2020 Nov 1 2350dd5f96c4SPhilip Paeps -7:00 - MST 23511315084cSEdwin Groothuis 23521315084cSEdwin Groothuis 23531315084cSEdwin Groothuis############################################################################### 23541315084cSEdwin Groothuis 23551315084cSEdwin Groothuis# Mexico 23561315084cSEdwin Groothuis 23572627f31fSEdwin Groothuis# From Paul Eggert (2014-12-07): 23581315084cSEdwin Groothuis# The Investigation and Analysis Service of the 23591315084cSEdwin Groothuis# Mexican Library of Congress (MLoC) has published a 23601315084cSEdwin Groothuis# history of Mexican local time (in Spanish) 23612627f31fSEdwin Groothuis# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 23621315084cSEdwin Groothuis# 23631315084cSEdwin Groothuis# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 23641315084cSEdwin Groothuis# (In all cases we go with the MLoC.) 23651315084cSEdwin Groothuis# S&P report that Baja was at -8:00 in 1922/1923. 23661315084cSEdwin Groothuis# S&P say the 1930 transition in Baja was 1930-11-16. 23671315084cSEdwin Groothuis# S&P report no DST during summer 1931. 23681315084cSEdwin Groothuis# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 23691315084cSEdwin Groothuis 23701315084cSEdwin Groothuis# From Gwillim Law (2001-02-20): 23711315084cSEdwin Groothuis# There are some other discrepancies between the Decrees page and the 23721315084cSEdwin Groothuis# tz database. I think they can best be explained by supposing that 23731315084cSEdwin Groothuis# the researchers who prepared the Decrees page failed to find some of 23741315084cSEdwin Groothuis# the relevant documents. 23751315084cSEdwin Groothuis 23761315084cSEdwin Groothuis# From Alan Perry (1996-02-15): 23771315084cSEdwin Groothuis# A guy from our Mexico subsidiary finally found the Presidential Decree 23781315084cSEdwin Groothuis# outlining the timezone changes in Mexico. 23791315084cSEdwin Groothuis# 23801315084cSEdwin Groothuis# ------------- Begin Forwarded Message ------------- 23811315084cSEdwin Groothuis# 23821315084cSEdwin Groothuis# I finally got my hands on the Official Presidential Decree that sets up the 23831315084cSEdwin Groothuis# rules for the DST changes. The rules are: 23841315084cSEdwin Groothuis# 23851315084cSEdwin Groothuis# 1. The country is divided in 3 timezones: 23861315084cSEdwin Groothuis# - Baja California Norte (the Mexico/BajaNorte TZ) 23871315084cSEdwin Groothuis# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 23881315084cSEdwin Groothuis# - The rest of the country (the Mexico/General TZ) 23891315084cSEdwin Groothuis# 23901315084cSEdwin Groothuis# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 23911315084cSEdwin Groothuis# at 2:00 AM, the times in each zone are as follows: 23921315084cSEdwin Groothuis# BajaNorte: GMT+7 23931315084cSEdwin Groothuis# BajaSur: GMT+6 23941315084cSEdwin Groothuis# General: GMT+5 23951315084cSEdwin Groothuis# 23961315084cSEdwin Groothuis# 3. The rest of the year, the times are as follows: 23971315084cSEdwin Groothuis# BajaNorte: GMT+8 23981315084cSEdwin Groothuis# BajaSur: GMT+7 23991315084cSEdwin Groothuis# General: GMT+6 24001315084cSEdwin Groothuis# 24011315084cSEdwin Groothuis# The Decree was published in Mexico's Official Newspaper on January 4th. 24021315084cSEdwin Groothuis# 24031315084cSEdwin Groothuis# -------------- End Forwarded Message -------------- 24041315084cSEdwin Groothuis# From Paul Eggert (1996-06-12): 24051315084cSEdwin Groothuis# For an English translation of the decree, see 24067ce0f064SEdwin Groothuis# "Diario Oficial: Time Zone Changeover" (1996-01-04). 24077ce0f064SEdwin Groothuis# http://mexico-travel.com/extra/timezone_eng.html 24081315084cSEdwin Groothuis 24091315084cSEdwin Groothuis# From Rives McDow (1998-10-08): 24101315084cSEdwin Groothuis# The State of Quintana Roo has reverted back to central STD and DST times 24111315084cSEdwin Groothuis# (i.e. UTC -0600 and -0500 as of 1998-08-02). 24121315084cSEdwin Groothuis 24131315084cSEdwin Groothuis# From Rives McDow (2000-01-10): 24141315084cSEdwin Groothuis# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 24151315084cSEdwin Groothuis# zone 5 hours from the International Date Line, and will not observe daylight 24161315084cSEdwin Groothuis# savings time so as to stay on the same time zone as the southern part of 24171315084cSEdwin Groothuis# Arizona year round. 24181315084cSEdwin Groothuis 2419eb1c1a05SSergey Kandaurov# From Jesper Nørgaard, translating 24201315084cSEdwin Groothuis# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 24211315084cSEdwin Groothuis# In Oaxaca, the 55.000 teachers from the Section 22 of the National 24221315084cSEdwin Groothuis# Syndicate of Education Workers, refuse to apply daylight saving each 24231315084cSEdwin Groothuis# year, so that the more than 10,000 schools work at normal hour the 24241315084cSEdwin Groothuis# whole year. 24251315084cSEdwin Groothuis 24261315084cSEdwin Groothuis# From Gwillim Law (2001-01-19): 24271315084cSEdwin Groothuis# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 24281315084cSEdwin Groothuis# (translated):... 24291315084cSEdwin Groothuis# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 24301315084cSEdwin Groothuis# that Summer Time will be reduced from seven to five months, starting 24311315084cSEdwin Groothuis# this year.... 24327ce0f064SEdwin Groothuis# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 24331315084cSEdwin Groothuis# [translated], says "summer time will ... take effect on the first Sunday 24341315084cSEdwin Groothuis# in May, and end on the last Sunday of September. 24351315084cSEdwin Groothuis 24361315084cSEdwin Groothuis# From Arthur David Olson (2001-01-25): 24371315084cSEdwin Groothuis# The 2001-01-24 traditional Washington Post contained the page one 24381315084cSEdwin Groothuis# story "Timely Issue Divides Mexicans."... 24391315084cSEdwin Groothuis# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2440eb1c1a05SSergey Kandaurov# ... Mexico City Mayor López Obrador "...is threatening to keep 24411315084cSEdwin Groothuis# Mexico City and its 20 million residents on a different time than 2442eb1c1a05SSergey Kandaurov# the rest of the country..." In particular, López Obrador would abolish 24431315084cSEdwin Groothuis# observation of Daylight Saving Time. 24441315084cSEdwin Groothuis 24451315084cSEdwin Groothuis# Official statute published by the Energy Department 24467ce0f064SEdwin Groothuis# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2447eb1c1a05SSergey Kandaurov# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2448eb1c1a05SSergey Kandaurov# and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 24491315084cSEdwin Groothuis 24501315084cSEdwin Groothuis# From Paul Eggert (2001-03-03): 24511315084cSEdwin Groothuis# 24522865ab3fSPhilip Paeps# https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html 24531315084cSEdwin Groothuis# James F. Smith writes in today's LA Times 24541315084cSEdwin Groothuis# * Sonora will continue to observe standard time. 2455eb1c1a05SSergey Kandaurov# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 24561315084cSEdwin Groothuis# the Federal District will not adopt DST. 24571315084cSEdwin Groothuis# * 4 of 16 district leaders announced they'll ignore the decree. 24581315084cSEdwin Groothuis# * The decree does not affect federal-controlled facilities including 24591315084cSEdwin Groothuis# the airport, banks, hospitals, and schools. 24601315084cSEdwin Groothuis# 24611315084cSEdwin Groothuis# For now we'll assume that the Federal District will bow to federal rules. 24621315084cSEdwin Groothuis 2463eb1c1a05SSergey Kandaurov# From Jesper Nørgaard (2001-04-01): 24641315084cSEdwin Groothuis# I found some references to the Mexican application of daylight 24651315084cSEdwin Groothuis# saving, which modifies what I had already sent you, stating earlier 24661315084cSEdwin Groothuis# that a number of northern Mexican states would go on daylight 24671315084cSEdwin Groothuis# saving. The modification reverts this to only cover Baja California 24681315084cSEdwin Groothuis# (Norte), while all other states (except Sonora, who has no daylight 24691315084cSEdwin Groothuis# saving all year) will follow the original decree of president 24701315084cSEdwin Groothuis# Vicente Fox, starting daylight saving May 6, 2001 and ending 24711315084cSEdwin Groothuis# September 30, 2001. 2472eb1c1a05SSergey Kandaurov# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 24731315084cSEdwin Groothuis# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 24741315084cSEdwin Groothuis 24751315084cSEdwin Groothuis# From Reuters (2001-09-04): 24761315084cSEdwin Groothuis# Mexico's Supreme Court on Tuesday declared that daylight savings was 24771315084cSEdwin Groothuis# unconstitutional in Mexico City, creating the possibility the 24781315084cSEdwin Groothuis# capital will be in a different time zone from the rest of the nation 24791315084cSEdwin Groothuis# next year.... The Supreme Court's ruling takes effect at 2:00 24801315084cSEdwin Groothuis# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 24811315084cSEdwin Groothuis# standard time. "This is so residents of the Federal District are not 24821315084cSEdwin Groothuis# subject to unexpected time changes," a statement from the court said. 24831315084cSEdwin Groothuis 2484eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2002-03-12): 24851315084cSEdwin Groothuis# ... consulting my local grocery store(!) and my coworkers, they all insisted 24861315084cSEdwin Groothuis# that a new decision had been made to reinstate US style DST in Mexico.... 24871315084cSEdwin Groothuis# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 24881315084cSEdwin Groothuis# confirms this. Sonora as usual is the only state where DST is not applied. 24891315084cSEdwin Groothuis 24901315084cSEdwin Groothuis# From Steffen Thorsen (2009-12-28): 24911315084cSEdwin Groothuis# 24921315084cSEdwin Groothuis# Steffen Thorsen wrote: 24931315084cSEdwin Groothuis# > Mexico's House of Representatives has approved a proposal for northern 24941315084cSEdwin Groothuis# > Mexico's border cities to share the same daylight saving schedule as 24951315084cSEdwin Groothuis# > the United States. 24961315084cSEdwin Groothuis# Now this has passed both the Congress and the Senate, so starting from 24971315084cSEdwin Groothuis# 2010, some border regions will be the same: 24981315084cSEdwin Groothuis# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 24991315084cSEdwin Groothuis# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 25001315084cSEdwin Groothuis# (Spanish) 25011315084cSEdwin Groothuis# 25021315084cSEdwin Groothuis# Could not find the new law text, but the proposed law text changes are here: 25031315084cSEdwin Groothuis# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 25041315084cSEdwin Groothuis# (Gaceta Parlamentaria) 25051315084cSEdwin Groothuis# 25061315084cSEdwin Groothuis# There is also a list of the votes here: 25071315084cSEdwin Groothuis# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 25081315084cSEdwin Groothuis# 25091315084cSEdwin Groothuis# Our page: 25108d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/north-mexico-dst-change.html 25111315084cSEdwin Groothuis 25121315084cSEdwin Groothuis# From Arthur David Olson (2010-01-20): 25131315084cSEdwin Groothuis# The page 25141315084cSEdwin Groothuis# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 25151315084cSEdwin Groothuis# includes this text: 25161315084cSEdwin Groothuis# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2517eb1c1a05SSergey Kandaurov# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2518eb1c1a05SSergey Kandaurov# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2519eb1c1a05SSergey Kandaurov# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2520eb1c1a05SSergey Kandaurov# desde las dos horas del segundo domingo de marzo y concluirá a las dos 25211315084cSEdwin Groothuis# horas del primer domingo de noviembre. 25221315084cSEdwin Groothuis# En los municipios fronterizos que se encuentren ubicados en la franja 2523eb1c1a05SSergey Kandaurov# fronteriza norte en el territorio comprendido entre la línea 2524eb1c1a05SSergey Kandaurov# internacional y la línea paralela ubicada a una distancia de veinte 2525eb1c1a05SSergey Kandaurov# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2526eb1c1a05SSergey Kandaurov# interior del país, la aplicación de este horario estacional surtirá 2527eb1c1a05SSergey Kandaurov# efecto desde las dos horas del segundo domingo de marzo y concluirá a 25281315084cSEdwin Groothuis# las dos horas del primer domingo de noviembre. 25291315084cSEdwin Groothuis 25302627f31fSEdwin Groothuis# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 25312627f31fSEdwin Groothuis# The Mexican state of Quintana Roo will likely change to EST in 2015. 25322627f31fSEdwin Groothuis# 25332627f31fSEdwin Groothuis# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 25342627f31fSEdwin Groothuis# "With this change, the time conflict that has existed between the municipios 25352627f31fSEdwin Groothuis# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 25362627f31fSEdwin Groothuis# end. The latter declared itself in rebellion 15 years ago when a time change 25372627f31fSEdwin Groothuis# was initiated in Mexico, and since then it has refused to change its time 25382627f31fSEdwin Groothuis# zone along with the rest of the country." 25392627f31fSEdwin Groothuis# 25402627f31fSEdwin Groothuis# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 25412627f31fSEdwin Groothuis# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 25422627f31fSEdwin Groothuis# "...the new time zone will come into effect at two o'clock on the first Sunday 25432627f31fSEdwin Groothuis# of February, when we will have to advance the clock one hour from its current 25442627f31fSEdwin Groothuis# time..." 25452627f31fSEdwin Groothuis# Also, the new zone will not use DST. 254674d26aa7SEdwin Groothuis# 254774d26aa7SEdwin Groothuis# From Carlos Raúl Perasso (2015-02-02): 254874d26aa7SEdwin Groothuis# The decree that modifies the Mexican Hour System Law has finally 254974d26aa7SEdwin Groothuis# been published at the Diario Oficial de la Federación 255074d26aa7SEdwin Groothuis# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 255174d26aa7SEdwin Groothuis# It establishes 5 zones for Mexico: 255274d26aa7SEdwin Groothuis# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 255374d26aa7SEdwin Groothuis# includes most of Mexico, excluding what's mentioned below. 255474d26aa7SEdwin Groothuis# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the 255574d26aa7SEdwin Groothuis# states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía 255674d26aa7SEdwin Groothuis# de Banderas which lies in Central Zone); Sinaloa and Sonora. 255774d26aa7SEdwin Groothuis# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 255874d26aa7SEdwin Groothuis# state of Baja California. 255974d26aa7SEdwin Groothuis# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 256074d26aa7SEdwin Groothuis# of Quintana Roo. 256174d26aa7SEdwin Groothuis# 5- The islands, reefs and keys shall take their timezone from the 256274d26aa7SEdwin Groothuis# longitude they are located at. 25632627f31fSEdwin Groothuis 25649142a2a3SPhilip Paeps# From Paul Eggert (2022-10-28): 25659142a2a3SPhilip Paeps# The new Mexican law was published today: 25669142a2a3SPhilip Paeps# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 25679142a2a3SPhilip Paeps# This abolishes DST except where US DST rules are observed, 25689142a2a3SPhilip Paeps# and in addition changes all of Chihuahua to -06 with no DST. 25699142a2a3SPhilip Paeps 2570cf1ad535SPhilip Paeps# From Heitor David Pinto (2022-11-28): 2571259e2ad7SPhilip Paeps# Now the northern [municipios] want to have the same time zone as the 2572cf1ad535SPhilip Paeps# respective neighboring cities in the US, for example Juárez in UTC-7 with 2573cf1ad535SPhilip Paeps# DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... 2574cf1ad535SPhilip Paeps# the president authorized the publication of the decree for November 29, 2575cf1ad535SPhilip Paeps# so the time change would occur on November 30 at 0:00. 2576cf1ad535SPhilip Paeps# http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ 2577cf1ad535SPhilip Paeps 257812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 25795d56371cSPhilip PaepsRule Mexico 1931 only - May 1 23:00 1:00 D 25805d56371cSPhilip PaepsRule Mexico 1931 only - Oct 1 0:00 0 S 25811315084cSEdwin GroothuisRule Mexico 1939 only - Feb 5 0:00 1:00 D 25821315084cSEdwin GroothuisRule Mexico 1939 only - Jun 25 0:00 0 S 25831315084cSEdwin GroothuisRule Mexico 1940 only - Dec 9 0:00 1:00 D 25841315084cSEdwin GroothuisRule Mexico 1941 only - Apr 1 0:00 0 S 25851315084cSEdwin GroothuisRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 25861315084cSEdwin GroothuisRule Mexico 1944 only - May 1 0:00 0 S 25871315084cSEdwin GroothuisRule Mexico 1950 only - Feb 12 0:00 1:00 D 25881315084cSEdwin GroothuisRule Mexico 1950 only - Jul 30 0:00 0 S 25891315084cSEdwin GroothuisRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 25901315084cSEdwin GroothuisRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 25911315084cSEdwin GroothuisRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 25921315084cSEdwin GroothuisRule Mexico 2001 only - Sep lastSun 2:00 0 S 25939142a2a3SPhilip PaepsRule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D 25949142a2a3SPhilip PaepsRule Mexico 2002 2022 - Oct lastSun 2:00 0 S 25952865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 2596eb1c1a05SSergey Kandaurov# Quintana Roo; represented by Cancún 25975d56371cSPhilip PaepsZone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u 25981315084cSEdwin Groothuis -6:00 - CST 1981 Dec 23 25991315084cSEdwin Groothuis -5:00 Mexico E%sT 1998 Aug 2 2:00 26002627f31fSEdwin Groothuis -6:00 Mexico C%sT 2015 Feb 1 2:00 26012627f31fSEdwin Groothuis -5:00 - EST 2602eb1c1a05SSergey Kandaurov# Campeche, Yucatán; represented by Mérida 26035d56371cSPhilip PaepsZone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u 26041315084cSEdwin Groothuis -6:00 - CST 1981 Dec 23 26051315084cSEdwin Groothuis -5:00 - EST 1982 Dec 2 26061315084cSEdwin Groothuis -6:00 Mexico C%sT 26078fdf5721SBaptiste Daroussin# Coahuila, Nuevo León, Tamaulipas (near US border) 2608259e2ad7SPhilip Paeps# This includes the following municipios: 2609cf1ad535SPhilip Paeps# in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, 2610cf1ad535SPhilip Paeps# Ocampo, Piedras Negras, Villa Unión, Zaragoza 2611cf1ad535SPhilip Paeps# in Nuevo León: Anáhuac 26128fdf5721SBaptiste Daroussin# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, 26138fdf5721SBaptiste Daroussin# Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. 2614cf1ad535SPhilip Paeps# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 26155d56371cSPhilip PaepsZone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u 26161315084cSEdwin Groothuis -6:00 - CST 1988 26171315084cSEdwin Groothuis -6:00 US C%sT 1989 26181315084cSEdwin Groothuis -6:00 Mexico C%sT 2010 26191315084cSEdwin Groothuis -6:00 US C%sT 26208fdf5721SBaptiste Daroussin# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) 26215d56371cSPhilip PaepsZone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u 26221315084cSEdwin Groothuis -6:00 - CST 1988 26231315084cSEdwin Groothuis -6:00 US C%sT 1989 26241315084cSEdwin Groothuis -6:00 Mexico C%sT 26251315084cSEdwin Groothuis# Central Mexico 26265d56371cSPhilip PaepsZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u 26271315084cSEdwin Groothuis -7:00 - MST 1927 Jun 10 23:00 26281315084cSEdwin Groothuis -6:00 - CST 1930 Nov 15 26295d56371cSPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 26307ce0f064SEdwin Groothuis -6:00 Mexico C%sT 2001 Sep 30 2:00 26311315084cSEdwin Groothuis -6:00 - CST 2002 Feb 20 26321315084cSEdwin Groothuis -6:00 Mexico C%sT 2633cf1ad535SPhilip Paeps# Chihuahua (near US border - western side) 2634259e2ad7SPhilip Paeps# This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and 2635259e2ad7SPhilip Paeps# Práxedis G Guerrero. 2636cf1ad535SPhilip Paeps# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf 2637cf1ad535SPhilip PaepsZone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u 2638cf1ad535SPhilip Paeps -7:00 - MST 1927 Jun 10 23:00 2639cf1ad535SPhilip Paeps -6:00 - CST 1930 Nov 15 2640cf1ad535SPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 2641cf1ad535SPhilip Paeps -6:00 - CST 1996 2642cf1ad535SPhilip Paeps -6:00 Mexico C%sT 1998 2643cf1ad535SPhilip Paeps -6:00 - CST 1998 Apr Sun>=1 3:00 2644cf1ad535SPhilip Paeps -7:00 Mexico M%sT 2010 2645cf1ad535SPhilip Paeps -7:00 US M%sT 2022 Oct 30 2:00 2646cf1ad535SPhilip Paeps -6:00 - CST 2022 Nov 30 0:00 2647cf1ad535SPhilip Paeps -7:00 US M%sT 2648cf1ad535SPhilip Paeps# Chihuahua (near US border - eastern side) 2649259e2ad7SPhilip Paeps# This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel 2650259e2ad7SPhilip Paeps# Benavides. 2651cf1ad535SPhilip Paeps# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf 26525d56371cSPhilip PaepsZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u 26531315084cSEdwin Groothuis -7:00 - MST 1927 Jun 10 23:00 26541315084cSEdwin Groothuis -6:00 - CST 1930 Nov 15 26555d56371cSPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 26561315084cSEdwin Groothuis -6:00 - CST 1996 26571315084cSEdwin Groothuis -6:00 Mexico C%sT 1998 26581315084cSEdwin Groothuis -6:00 - CST 1998 Apr Sun>=1 3:00 26591315084cSEdwin Groothuis -7:00 Mexico M%sT 2010 26609142a2a3SPhilip Paeps -7:00 US M%sT 2022 Oct 30 2:00 2661cf1ad535SPhilip Paeps -6:00 - CST 2022 Nov 30 0:00 2662cf1ad535SPhilip Paeps -6:00 US C%sT 26631315084cSEdwin Groothuis# Chihuahua (away from US border) 26645d56371cSPhilip PaepsZone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u 26651315084cSEdwin Groothuis -7:00 - MST 1927 Jun 10 23:00 26661315084cSEdwin Groothuis -6:00 - CST 1930 Nov 15 26675d56371cSPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 26681315084cSEdwin Groothuis -6:00 - CST 1996 26691315084cSEdwin Groothuis -6:00 Mexico C%sT 1998 26701315084cSEdwin Groothuis -6:00 - CST 1998 Apr Sun>=1 3:00 26719142a2a3SPhilip Paeps -7:00 Mexico M%sT 2022 Oct 30 2:00 26729142a2a3SPhilip Paeps -6:00 - CST 26731315084cSEdwin Groothuis# Sonora 26745d56371cSPhilip PaepsZone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u 26751315084cSEdwin Groothuis -7:00 - MST 1927 Jun 10 23:00 26761315084cSEdwin Groothuis -6:00 - CST 1930 Nov 15 26775d56371cSPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 26781315084cSEdwin Groothuis -6:00 - CST 1942 Apr 24 26791315084cSEdwin Groothuis -7:00 - MST 1949 Jan 14 26801315084cSEdwin Groothuis -8:00 - PST 1970 26811315084cSEdwin Groothuis -7:00 Mexico M%sT 1999 26821315084cSEdwin Groothuis -7:00 - MST 2683910a59c4SEdwin Groothuis 2684cf1ad535SPhilip Paeps# Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa 2685cf1ad535SPhilip PaepsZone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u 2686cf1ad535SPhilip Paeps -7:00 - MST 1927 Jun 10 23:00 2687cf1ad535SPhilip Paeps -6:00 - CST 1930 Nov 15 2688cf1ad535SPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 2689cf1ad535SPhilip Paeps -6:00 - CST 1942 Apr 24 2690cf1ad535SPhilip Paeps -7:00 - MST 1949 Jan 14 2691cf1ad535SPhilip Paeps -8:00 - PST 1970 2692cf1ad535SPhilip Paeps -7:00 Mexico M%sT 2693cf1ad535SPhilip Paeps 2694cf1ad535SPhilip Paeps# Bahía de Banderas 2695cf1ad535SPhilip Paeps 2696910a59c4SEdwin Groothuis# From Alexander Krivenyshev (2010-04-21): 2697eb1c1a05SSergey Kandaurov# According to news, Bahía de Banderas (Mexican state of Nayarit) 2698910a59c4SEdwin Groothuis# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2699910a59c4SEdwin Groothuis# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2700910a59c4SEdwin Groothuis# 2701910a59c4SEdwin Groothuis# (Spanish) 2702eb1c1a05SSergey Kandaurov# Bahía de Banderas homologa su horario al del centro del 2703eb1c1a05SSergey Kandaurov# país, a partir de este domingo 2704910a59c4SEdwin Groothuis# http://www.nayarit.gob.mx/notes.asp?id=20748 2705910a59c4SEdwin Groothuis# 2706eb1c1a05SSergey Kandaurov# Bahía de Banderas homologa su horario con el del Centro del 2707eb1c1a05SSergey Kandaurov# País 2708eb1c1a05SSergey Kandaurov# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2709910a59c4SEdwin Groothuis# 2710910a59c4SEdwin Groothuis# (English) 2711eb1c1a05SSergey Kandaurov# Puerto Vallarta and Bahía de Banderas: One Time Zone 2712910a59c4SEdwin Groothuis# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2713910a59c4SEdwin Groothuis# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2714910a59c4SEdwin Groothuis# 2715910a59c4SEdwin Groothuis# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2716eb1c1a05SSergey Kandaurov# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2717910a59c4SEdwin Groothuis# zone ..." 27181315084cSEdwin Groothuis# Baja California Sur, Nayarit, Sinaloa 2719910a59c4SEdwin Groothuis 2720910a59c4SEdwin Groothuis# From Arthur David Olson (2010-05-01): 2721910a59c4SEdwin Groothuis# Use "Bahia_Banderas" to keep the name to fourteen characters. 2722910a59c4SEdwin Groothuis 27235d56371cSPhilip PaepsZone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u 2724910a59c4SEdwin Groothuis -7:00 - MST 1927 Jun 10 23:00 2725910a59c4SEdwin Groothuis -6:00 - CST 1930 Nov 15 27265d56371cSPhilip Paeps -7:00 Mexico M%sT 1932 Apr 1 2727910a59c4SEdwin Groothuis -6:00 - CST 1942 Apr 24 2728910a59c4SEdwin Groothuis -7:00 - MST 1949 Jan 14 2729910a59c4SEdwin Groothuis -8:00 - PST 1970 2730f2dd838fSEdwin Groothuis -7:00 Mexico M%sT 2010 Apr 4 2:00 2731910a59c4SEdwin Groothuis -6:00 Mexico C%sT 2732910a59c4SEdwin Groothuis 27338fdf5721SBaptiste Daroussin# Baja California 27345d56371cSPhilip PaepsZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u 27351315084cSEdwin Groothuis -7:00 - MST 1924 27361315084cSEdwin Groothuis -8:00 - PST 1927 Jun 10 23:00 27371315084cSEdwin Groothuis -7:00 - MST 1930 Nov 15 27381315084cSEdwin Groothuis -8:00 - PST 1931 Apr 1 27391315084cSEdwin Groothuis -8:00 1:00 PDT 1931 Sep 30 27401315084cSEdwin Groothuis -8:00 - PST 1942 Apr 24 27411315084cSEdwin Groothuis -8:00 1:00 PWT 1945 Aug 14 23:00u 27421315084cSEdwin Groothuis -8:00 1:00 PPT 1945 Nov 12 # Peace 27431315084cSEdwin Groothuis -8:00 - PST 1948 Apr 5 27441315084cSEdwin Groothuis -8:00 1:00 PDT 1949 Jan 14 27451315084cSEdwin Groothuis -8:00 - PST 1954 27461315084cSEdwin Groothuis -8:00 CA P%sT 1961 27471315084cSEdwin Groothuis -8:00 - PST 1976 27481315084cSEdwin Groothuis -8:00 US P%sT 1996 27491315084cSEdwin Groothuis -8:00 Mexico P%sT 2001 27501315084cSEdwin Groothuis -8:00 US P%sT 2002 Feb 20 27511315084cSEdwin Groothuis -8:00 Mexico P%sT 2010 27521315084cSEdwin Groothuis -8:00 US P%sT 27531315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 27541315084cSEdwin Groothuis# Formerly there was an America/Ensenada zone, which differed from 27551315084cSEdwin Groothuis# America/Tijuana only in that it did not observe DST from 1976 27561315084cSEdwin Groothuis# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 27571315084cSEdwin Groothuis# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2758eb1c1a05SSergey Kandaurov# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 27591315084cSEdwin Groothuis# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 27601315084cSEdwin Groothuis# DST-observance was a town-by-town matter back then. This concerns 27611315084cSEdwin Groothuis# data after 1970 so most likely there should be at least one Zone 27621315084cSEdwin Groothuis# other than America/Tijuana for Baja, but it's not clear yet what its 27631315084cSEdwin Groothuis# name or contents should be. 27641315084cSEdwin Groothuis# 27658fdf5721SBaptiste Daroussin# From Paul Eggert (2015-10-08): 27668fdf5721SBaptiste Daroussin# Formerly there was an America/Santa_Isabel zone, but this appears to 27678fdf5721SBaptiste Daroussin# have come from a misreading of 27688fdf5721SBaptiste Daroussin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 27698fdf5721SBaptiste Daroussin# It has been moved to the 'backward' file. 27708fdf5721SBaptiste Daroussin# 27719142a2a3SPhilip Paeps# From Paul Eggert (2022-10-28): 27729142a2a3SPhilip Paeps# Today's new law states that the entire state of Baja California 27739142a2a3SPhilip Paeps# follows US DST rules, which agrees with simplifications noted above. 27749142a2a3SPhilip Paeps# 27758fdf5721SBaptiste Daroussin# 27761315084cSEdwin Groothuis# Revillagigedo Is 27771315084cSEdwin Groothuis# no information 27781315084cSEdwin Groothuis 27791315084cSEdwin Groothuis############################################################################### 27801315084cSEdwin Groothuis 27811315084cSEdwin Groothuis# Barbados 2782eb185a68SEdwin Groothuis 27839f9fc6bbSPhilip Paeps# For 1899 Milne gives -3:58:29.2. 2784eb185a68SEdwin Groothuis 278594c2d487SPhilip Paeps# From P Chan (2020-12-09 and 2020-12-11): 278694c2d487SPhilip Paeps# Standard time of GMT-4 was adopted in 1911. 278794c2d487SPhilip Paeps# Definition of Time Act, 1911 (1911-7) [1911-08-28] 278894c2d487SPhilip Paeps# 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522 278994c2d487SPhilip Paeps# 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122 279094c2d487SPhilip Paeps# http://llmc.com/browse.aspx?type=2&coll=85&div=297 279194c2d487SPhilip Paeps# 279294c2d487SPhilip Paeps# DST was observed in 1942-44. 279394c2d487SPhilip Paeps# Defence (Daylight Saving) Regulations, 1942, 1942-04-13 279494c2d487SPhilip Paeps# Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22 279594c2d487SPhilip Paeps# Defence (Daylight Saving) Regulations, 1943, 1943-04-16 279694c2d487SPhilip Paeps# Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01 279794c2d487SPhilip Paeps# Defence (Daylight Saving) Regulations, 1944, 1944-03-21 279894c2d487SPhilip Paeps# [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28] 279994c2d487SPhilip Paeps# Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30 280094c2d487SPhilip Paeps# 280194c2d487SPhilip Paeps# 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591 280294c2d487SPhilip Paeps# 1942: Image Nos. 527-528, 555-556 280394c2d487SPhilip Paeps# 1943: Image Nos. 178-179, 198 280494c2d487SPhilip Paeps# 1944: Image Nos. 113-115, 129 280594c2d487SPhilip Paeps# http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437 280694c2d487SPhilip Paeps# 280794c2d487SPhilip Paeps# From Tim Parenti (2021-02-20): 280894c2d487SPhilip Paeps# The transitions below are derived from P Chan's sources, except that the 1977 280994c2d487SPhilip Paeps# through 1980 transitions are from Shanks & Pottenger since we have no better 281094c2d487SPhilip Paeps# data there. Of particular note, the 1944 DST regulation only advanced the 281194c2d487SPhilip Paeps# time to "exactly three and a half hours later than Greenwich mean time", as 281294c2d487SPhilip Paeps# opposed to "three hours" in the 1942 and 1943 regulations. 281394c2d487SPhilip Paeps 281412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 281594c2d487SPhilip PaepsRule Barb 1942 only - Apr 19 5:00u 1:00 D 281694c2d487SPhilip PaepsRule Barb 1942 only - Aug 31 6:00u 0 S 281794c2d487SPhilip PaepsRule Barb 1943 only - May 2 5:00u 1:00 D 281894c2d487SPhilip PaepsRule Barb 1943 only - Sep 5 6:00u 0 S 281994c2d487SPhilip PaepsRule Barb 1944 only - Apr 10 5:00u 0:30 - 282094c2d487SPhilip PaepsRule Barb 1944 only - Sep 10 6:00u 0 S 28211315084cSEdwin GroothuisRule Barb 1977 only - Jun 12 2:00 1:00 D 28221315084cSEdwin GroothuisRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 28231315084cSEdwin GroothuisRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 28241315084cSEdwin GroothuisRule Barb 1979 only - Sep 30 2:00 0 S 28251315084cSEdwin GroothuisRule Barb 1980 only - Sep 25 2:00 0 S 28262865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 28279f9fc6bbSPhilip Paeps #STDOFF -3:58:29.2 282894c2d487SPhilip PaepsZone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown 282994c2d487SPhilip Paeps -4:00 Barb A%sT 1944 283094c2d487SPhilip Paeps -4:00 Barb AST/-0330 1945 28311315084cSEdwin Groothuis -4:00 Barb A%sT 28321315084cSEdwin Groothuis 28331315084cSEdwin Groothuis# Belize 2834dc505d53SPhilip Paeps 2835dc505d53SPhilip Paeps# From P Chan (2020-11-03): 2836dc505d53SPhilip Paeps# Below are some laws related to the time in British Honduras/Belize: 2837dc505d53SPhilip Paeps# 2838dc505d53SPhilip Paeps# Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01] 2839dc505d53SPhilip Paeps# Ordinances of British Honduras Passed in the Year 1927, p 19-20 2840dc505d53SPhilip Paeps# https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19 2841dc505d53SPhilip Paeps# 2842dc505d53SPhilip Paeps# Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27] 2843dc505d53SPhilip Paeps# Ordinances of British Honduras Passed in the Year 1942, p 31-32 2844dc505d53SPhilip Paeps# https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44 2845dc505d53SPhilip Paeps# 2846dc505d53SPhilip Paeps# Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15] 2847dc505d53SPhilip Paeps# Ordinances of British Honduras Passed in the Year 1945, p 49-50 2848dc505d53SPhilip Paeps# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1 2849dc505d53SPhilip Paeps# 2850dc505d53SPhilip Paeps# Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11] 2851dc505d53SPhilip Paeps# Ordinances of British Honduras Passed in the Year 1947, p 1-2 2852dc505d53SPhilip Paeps# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1 2853dc505d53SPhilip Paeps# 2854dc505d53SPhilip Paeps# Time (Definition of) Ordinance (Chapter 180) 2855dc505d53SPhilip Paeps# The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580 2856dc505d53SPhilip Paeps# https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580 2857dc505d53SPhilip Paeps# 2858dc505d53SPhilip Paeps# Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03] 2859dc505d53SPhilip Paeps# https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9 2860dc505d53SPhilip Paeps# 2861dc505d53SPhilip Paeps# Definition of Time Act (Chapter 339) 2862dc505d53SPhilip Paeps# Law of Belize, Revised Edition 2000 2863dc505d53SPhilip Paeps# http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf 2864dc505d53SPhilip Paeps 2865dc505d53SPhilip Paeps# From Paul Eggert (2020-11-03): 2866dc505d53SPhilip Paeps# The transitions below are derived from P Chan's sources, except that the 2867dc505d53SPhilip Paeps# 1973 through 1983 transitions are from Shanks & Pottenger since we have 2868dc505d53SPhilip Paeps# no better data there. 2869dc505d53SPhilip Paeps 287012a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2871dc505d53SPhilip PaepsRule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530 2872dc505d53SPhilip PaepsRule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST 2873dc505d53SPhilip PaepsRule Belize 1942 only - Jun 27 24:00 1:00 CWT 2874dc505d53SPhilip PaepsRule Belize 1945 only - Aug 14 23:00u 1:00 CPT 2875dc505d53SPhilip PaepsRule Belize 1945 only - Dec 15 24:00 0 CST 2876dc505d53SPhilip PaepsRule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530 2877dc505d53SPhilip PaepsRule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST 2878dc135c6eSBaptiste DaroussinRule Belize 1973 only - Dec 5 0:00 1:00 CDT 2879dc135c6eSBaptiste DaroussinRule Belize 1974 only - Feb 9 0:00 0 CST 2880dc135c6eSBaptiste DaroussinRule Belize 1982 only - Dec 18 0:00 1:00 CDT 2881dc135c6eSBaptiste DaroussinRule Belize 1983 only - Feb 12 0:00 0 CST 28822865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 2883dc505d53SPhilip PaepsZone America/Belize -5:52:48 - LMT 1912 Apr 1 2884dc135c6eSBaptiste Daroussin -6:00 Belize %s 28851315084cSEdwin Groothuis 28861315084cSEdwin Groothuis# Bermuda 28871315084cSEdwin Groothuis 28889f9fc6bbSPhilip Paeps# From Paul Eggert (2022-07-27): 2889eb185a68SEdwin Groothuis# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2890dc505d53SPhilip Paeps# Bermuda dockyard, Ireland I. This agrees with standard offset given in the 28919f9fc6bbSPhilip Paeps# Daylight Saving Act, 1917 cited below. 2892dc505d53SPhilip Paeps# It is not known when this time became standard for Bermuda; guess 1890. 2893dc505d53SPhilip Paeps# The transition to -04 was specified by: 2894dc505d53SPhilip Paeps# 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08] 2895dc505d53SPhilip Paeps# https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1 2896dc505d53SPhilip Paeps 2897dc505d53SPhilip Paeps# From P Chan (2020-11-20): 2898dc505d53SPhilip Paeps# Most of the information can be found online from the Bermuda National 2899dc505d53SPhilip Paeps# Library - Digital Collection which includes The Royal Gazette (RG) until 1957 2900dc505d53SPhilip Paeps# https://bnl.contentdm.oclc.org/digital/ 2901dc505d53SPhilip Paeps# I will cite the ID. For example, [10000] means 2902dc505d53SPhilip Paeps# https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000 2903dc505d53SPhilip Paeps# 2904dc505d53SPhilip Paeps# 1917: Apr 5 midnight to Sep 30 midnight 2905dc505d53SPhilip Paeps# Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02] 2906dc505d53SPhilip Paeps# Bermuda Acts and Resolves 1917, p 37-38 2907dc505d53SPhilip Paeps# https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2 2908dc505d53SPhilip Paeps# RG, 1917-04-04, p 6 [42340] gives the spring forward date. 2909dc505d53SPhilip Paeps# 2910dc505d53SPhilip Paeps# 1918: Apr 13 midnight to Sep 15 midnight 2911dc505d53SPhilip Paeps# Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06] 2912dc505d53SPhilip Paeps# Bermuda Acts and Resolves 1917, p 13 2913dc505d53SPhilip Paeps# https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7 2914dc505d53SPhilip Paeps# 2915dc505d53SPhilip Paeps# Note that local mean time was still used before 1930. 2916dc505d53SPhilip Paeps# 2917dc505d53SPhilip Paeps# During WWII, DST was introduced by Defence Regulations 2918dc505d53SPhilip Paeps# 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726] 2919dc505d53SPhilip Paeps# 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193] 2920dc505d53SPhilip Paeps# 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593] 2921dc505d53SPhilip Paeps# 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461] 2922dc505d53SPhilip Paeps# RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1, 2923dc505d53SPhilip Paeps# 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1 2924dc505d53SPhilip Paeps# 2925dc505d53SPhilip Paeps# In 1946, the House of Assembly rejected DST twice. [128686], [128076] 2926dc505d53SPhilip Paeps# RG, 1946-03-16 p 1,1946-04-13 p 1 2927dc505d53SPhilip Paeps# 2928dc505d53SPhilip Paeps# 1947: third Sunday in May 02:00 to second Sunday in September 02:00 2929dc505d53SPhilip Paeps# DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12) 2930dc505d53SPhilip Paeps# which expired at the end of the year. [125784] ,[132405], [144454], [138226] 2931dc505d53SPhilip Paeps# RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1 2932dc505d53SPhilip Paeps# 2933dc505d53SPhilip Paeps# 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00 2934dc505d53SPhilip Paeps# DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12) 2935dc505d53SPhilip Paeps# which was set to expired at the end of the year but it was extended until 2936dc505d53SPhilip Paeps# the end of 1952 and was not further extended. 2937dc505d53SPhilip Paeps# [129802], [139403], [146008], [135240], [144330], [139049], [143309], 2938dc505d53SPhilip Paeps# [148271], [149773], [153589], [153802], [155924] 2939dc505d53SPhilip Paeps# RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1, 2940dc505d53SPhilip Paeps# 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1, 2941dc505d53SPhilip Paeps# 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8 2942dc505d53SPhilip Paeps# 2943dc505d53SPhilip Paeps# In 1953-1955, the House of Assembly rejected DST each year. [158996], 2944dc505d53SPhilip Paeps# [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1 2945dc505d53SPhilip Paeps# 2946dc505d53SPhilip Paeps# 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00 2947dc505d53SPhilip Paeps# Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25] 2948dc505d53SPhilip Paeps# Bermuda Public Acts 1956, p 331-332 2949dc505d53SPhilip Paeps# https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63 2950dc505d53SPhilip Paeps# 2951dc505d53SPhilip Paeps# The extension of the Act was rejected by the House of Assembly. [176218] 2952dc505d53SPhilip Paeps# RG, 1956-12-13, p 1 2953dc505d53SPhilip Paeps# 2954dc505d53SPhilip Paeps# From the Chronological Table of Public and Private Acts up to 1985, it seems 2955dc505d53SPhilip Paeps# that there does not exist other Acts related to DST before 1973. 2956dc505d53SPhilip Paeps# https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1 2957dc505d53SPhilip Paeps# Public Acts of the Legislature of the Islands of Bermuda, Together with 2958dc505d53SPhilip Paeps# Statutory Instruments in Force Thereunder, Vol VII 2959eb185a68SEdwin Groothuis 29601315084cSEdwin Groothuis# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 29611315084cSEdwin Groothuis# Next year, however, clocks in the US will go forward on the second Sunday 29621315084cSEdwin Groothuis# in March, until the first Sunday in November. And, after the Time Zone 29631315084cSEdwin Groothuis# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 29641315084cSEdwin Groothuis# Friday, the same thing will happen in Bermuda. 29651315084cSEdwin Groothuis# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 29661315084cSEdwin Groothuis 2967dc505d53SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2968dc505d53SPhilip PaepsRule Bermuda 1917 only - Apr 5 24:00 1:00 - 2969dc505d53SPhilip PaepsRule Bermuda 1917 only - Sep 30 24:00 0 - 2970dc505d53SPhilip PaepsRule Bermuda 1918 only - Apr 13 24:00 1:00 - 2971dc505d53SPhilip PaepsRule Bermuda 1918 only - Sep 15 24:00 0 S 2972dc505d53SPhilip PaepsRule Bermuda 1942 only - Jan 11 2:00 1:00 D 2973dc505d53SPhilip PaepsRule Bermuda 1942 only - Oct 18 2:00 0 S 2974dc505d53SPhilip PaepsRule Bermuda 1943 only - Mar 21 2:00 1:00 D 2975dc505d53SPhilip PaepsRule Bermuda 1943 only - Oct 31 2:00 0 S 2976dc505d53SPhilip PaepsRule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D 2977dc505d53SPhilip PaepsRule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S 2978dc505d53SPhilip PaepsRule Bermuda 1947 only - May Sun>=15 2:00 1:00 D 2979dc505d53SPhilip PaepsRule Bermuda 1947 only - Sep Sun>=8 2:00 0 S 2980dc505d53SPhilip PaepsRule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D 2981dc505d53SPhilip PaepsRule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S 2982dc505d53SPhilip PaepsRule Bermuda 1956 only - May Sun>=22 2:00 1:00 D 2983dc505d53SPhilip PaepsRule Bermuda 1956 only - Oct lastSun 2:00 0 S 2984dc505d53SPhilip Paeps 29852865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 29869f9fc6bbSPhilip Paeps #STDOFF -4:19:18.3 2987dc505d53SPhilip PaepsZone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton 2988dc505d53SPhilip Paeps -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00 2989dc505d53SPhilip Paeps -4:00 Bermuda A%sT 1974 Apr 28 2:00 2990c26a5802SEdwin Groothuis -4:00 Canada A%sT 1976 29911315084cSEdwin Groothuis -4:00 US A%sT 29921315084cSEdwin Groothuis 29931315084cSEdwin Groothuis# Costa Rica 2994eb185a68SEdwin Groothuis 29959f9fc6bbSPhilip Paeps# Milne gives -5:36:13.3 as San José mean time. 2996eb185a68SEdwin Groothuis 299712a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 29981315084cSEdwin GroothuisRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 29991315084cSEdwin GroothuisRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 30001315084cSEdwin GroothuisRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 30011315084cSEdwin Groothuis# IATA SSIM (1991-09) says the following was at 1:00; 30021315084cSEdwin Groothuis# go with Shanks & Pottenger. 30031315084cSEdwin GroothuisRule CR 1991 only - Jul 1 0:00 0 S 30041315084cSEdwin GroothuisRule CR 1992 only - Mar 15 0:00 0 S 3005eb1c1a05SSergey Kandaurov# There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 30062865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 30079f9fc6bbSPhilip Paeps #STDOFF -5:36:13.3 3008eb1c1a05SSergey KandaurovZone America/Costa_Rica -5:36:13 - LMT 1890 # San José 3009eb1c1a05SSergey Kandaurov -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 30101315084cSEdwin Groothuis -6:00 CR C%sT 30111315084cSEdwin Groothuis# Coco 30121315084cSEdwin Groothuis# no information; probably like America/Costa_Rica 30131315084cSEdwin Groothuis 30141315084cSEdwin Groothuis# Cuba 30151315084cSEdwin Groothuis 3016eb185a68SEdwin Groothuis# From Paul Eggert (2013-02-21): 3017eb185a68SEdwin Groothuis# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 3018eb185a68SEdwin Groothuis# for the port, and -5:30 for meteorological observations. 3019eb185a68SEdwin Groothuis# For now, stick with Shanks & Pottenger. 3020eb185a68SEdwin Groothuis 30211315084cSEdwin Groothuis# From Arthur David Olson (1999-03-29): 30221315084cSEdwin Groothuis# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 30231315084cSEdwin Groothuis# the Cuban National Team and the Baltimore Orioles was carried live on 30241315084cSEdwin Groothuis# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 30251315084cSEdwin Groothuis# During the game, play-by-play announcer Jim Hunter noted that 30261315084cSEdwin Groothuis# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 30271315084cSEdwin Groothuis# Time today." (The "two hour" remark referred to losing one hour of 3028eb1c1a05SSergey Kandaurov# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 3029eb1c1a05SSergey Kandaurov# to DST - and one more hour on 1999-04-04 - when the announcers will have 30301315084cSEdwin Groothuis# returned to Baltimore, which switches on that date.) 30311315084cSEdwin Groothuis 3032668615cdSEdwin Groothuis# From Steffen Thorsen (2013-11-11): 3033668615cdSEdwin Groothuis# DST start in Cuba in 2004 ... does not follow the same rules as the 3034668615cdSEdwin Groothuis# years before. The correct date should be Sunday 2004-03-28 00:00 ... 3035668615cdSEdwin Groothuis# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 3036668615cdSEdwin Groothuis 30371315084cSEdwin Groothuis# From Evert van der Veer via Steffen Thorsen (2004-10-28): 30381315084cSEdwin Groothuis# Cuba is not going back to standard time this year. 30391315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 30401315084cSEdwin Groothuis# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 30411315084cSEdwin Groothuis# says that it's due to a problem at the Antonio Guiteras 30421315084cSEdwin Groothuis# thermoelectric plant, and says "This October there will be no return 30431315084cSEdwin Groothuis# to normal hours (after daylight saving time)". 30441315084cSEdwin Groothuis# For now, let's assume that it's a temporary measure. 30451315084cSEdwin Groothuis 30461315084cSEdwin Groothuis# From Carlos A. Carnero Delgado (2005-11-12): 30471315084cSEdwin Groothuis# This year (just like in 2004-2005) there's no change in time zone 30481315084cSEdwin Groothuis# adjustment in Cuba. We will stay in daylight saving time: 30491315084cSEdwin Groothuis# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 30501315084cSEdwin Groothuis 3051eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2006-10-21): 30521315084cSEdwin Groothuis# An article in GRANMA INTERNACIONAL claims that Cuba will end 30531315084cSEdwin Groothuis# the 3 years of permanent DST next weekend, see 30541315084cSEdwin Groothuis# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 30551315084cSEdwin Groothuis# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 3056eb1c1a05SSergey Kandaurov# watches should be set back one hour - going back to 00:00 hours - returning 30571315084cSEdwin Groothuis# to the normal schedule.... 30581315084cSEdwin Groothuis 30591315084cSEdwin Groothuis# From Paul Eggert (2007-03-02): 3060eb1c1a05SSergey Kandaurov# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 30611315084cSEdwin Groothuis# says Cuban clocks will advance at midnight on March 10. 30621315084cSEdwin Groothuis# For lack of better information, assume Cuba will use US rules, 30631315084cSEdwin Groothuis# except that it switches at midnight standard time as usual. 30641315084cSEdwin Groothuis# 30651315084cSEdwin Groothuis# From Steffen Thorsen (2007-10-25): 30661315084cSEdwin Groothuis# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 30671315084cSEdwin Groothuis# earlier - on the last Sunday of October, just like in 2006. 30681315084cSEdwin Groothuis# 30691315084cSEdwin Groothuis# He supplied these references: 30701315084cSEdwin Groothuis# 3071259e2ad7SPhilip Paeps# http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES 30721315084cSEdwin Groothuis# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 30731315084cSEdwin Groothuis# 3074eb1c1a05SSergey Kandaurov# From Alex Krivenyshev (2007-10-25): 30751315084cSEdwin Groothuis# Here is also article from Granma (Cuba): 30761315084cSEdwin Groothuis# 3077eb1c1a05SSergey Kandaurov# Regirá el Horario Normal desde el próximo domingo 28 de octubre 30781315084cSEdwin Groothuis# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 30791315084cSEdwin Groothuis# 30801315084cSEdwin Groothuis# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 30811315084cSEdwin Groothuis 30821315084cSEdwin Groothuis# From Arthur David Olson (2008-03-09): 30831315084cSEdwin Groothuis# I'm in Maryland which is now observing United States Eastern Daylight 30841315084cSEdwin Groothuis# Time. At 9:44 local time I used RealPlayer to listen to 30851315084cSEdwin Groothuis# http://media.enet.cu/radioreloj 3086eb1c1a05SSergey Kandaurov# a Cuban information station, and heard 30871315084cSEdwin Groothuis# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 30881315084cSEdwin Groothuis# indicating that Cuba is still on standard time. 30891315084cSEdwin Groothuis 30901315084cSEdwin Groothuis# From Steffen Thorsen (2008-03-12): 30911315084cSEdwin Groothuis# It seems that Cuba will start DST on Sunday, 2007-03-16... 30921315084cSEdwin Groothuis# It was announced yesterday, according to this source (in Spanish): 30931315084cSEdwin Groothuis# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 30941315084cSEdwin Groothuis# 30951315084cSEdwin Groothuis# Some more background information is posted here: 30968d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 30971315084cSEdwin Groothuis# 30981315084cSEdwin Groothuis# The article also says that Cuba has been observing DST since 1963, 30991315084cSEdwin Groothuis# while Shanks (and tzdata) has 1965 as the first date (except in the 31001315084cSEdwin Groothuis# 1940's). Many other web pages in Cuba also claim that it has been 31011315084cSEdwin Groothuis# observed since 1963, but with the exception of 1970 - an exception 31021315084cSEdwin Groothuis# which is not present in tzdata/Shanks. So there is a chance we need to 31031315084cSEdwin Groothuis# change some historic records as well. 31041315084cSEdwin Groothuis# 31051315084cSEdwin Groothuis# One example: 31061315084cSEdwin Groothuis# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 31071315084cSEdwin Groothuis 3108eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2008-03-13): 31091315084cSEdwin Groothuis# The Cuban time change has just been confirmed on the most authoritative 31101315084cSEdwin Groothuis# web site, the Granma. Please check out 31111315084cSEdwin Groothuis# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 31121315084cSEdwin Groothuis# 3113eb1c1a05SSergey Kandaurov# Basically as expected after Steffen Thorsen's information, the change 31141315084cSEdwin Groothuis# will take place midnight between Saturday and Sunday. 31151315084cSEdwin Groothuis 31161315084cSEdwin Groothuis# From Arthur David Olson (2008-03-12): 31171315084cSEdwin Groothuis# Assume Sun>=15 (third Sunday) going forward. 31181315084cSEdwin Groothuis 31191315084cSEdwin Groothuis# From Alexander Krivenyshev (2009-03-04) 31201315084cSEdwin Groothuis# According to the Radio Reloj - Cuba will start Daylight Saving Time on 31211315084cSEdwin Groothuis# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 31221315084cSEdwin Groothuis# not on midnight March 14 / March 15 as previously thought. 31231315084cSEdwin Groothuis# 31241315084cSEdwin Groothuis# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 31251315084cSEdwin Groothuis# (in Spanish) 31261315084cSEdwin Groothuis 31271315084cSEdwin Groothuis# From Arthur David Olson (2009-03-09) 31281315084cSEdwin Groothuis# I listened over the Internet to 31291315084cSEdwin Groothuis# http://media.enet.cu/readioreloj 31301315084cSEdwin Groothuis# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 3131eb1c1a05SSergey Kandaurov# the time was announced as "diez cinco" - the same time as here, indicating 31321315084cSEdwin Groothuis# that has indeed switched to DST. Assume second Sunday from 2009 forward. 31331315084cSEdwin Groothuis 3134b6ef626aSEdwin Groothuis# From Steffen Thorsen (2011-03-08): 3135b6ef626aSEdwin Groothuis# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 3136b6ef626aSEdwin Groothuis# this year. Nothing about the end date known so far (if that has 3137b6ef626aSEdwin Groothuis# changed at all). 3138b6ef626aSEdwin Groothuis# 3139b6ef626aSEdwin Groothuis# Source: 3140b6ef626aSEdwin Groothuis# http://granma.co.cu/2011/03/08/nacional/artic01.html 3141b6ef626aSEdwin Groothuis# 3142b6ef626aSEdwin Groothuis# Our info: 31438d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 3144550d397eSEdwin Groothuis# 3145550d397eSEdwin Groothuis# From Steffen Thorsen (2011-10-30) 3146550d397eSEdwin Groothuis# Cuba will end DST two weeks later this year. Instead of going back 3147550d397eSEdwin Groothuis# tonight, it has been delayed to 2011-11-13 at 01:00. 3148550d397eSEdwin Groothuis# 3149550d397eSEdwin Groothuis# One source (Spanish) 3150550d397eSEdwin Groothuis# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 3151550d397eSEdwin Groothuis# 3152550d397eSEdwin Groothuis# Our page: 31538d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html 31543797824cSEdwin Groothuis# 31553797824cSEdwin Groothuis# From Steffen Thorsen (2012-03-01) 31563797824cSEdwin Groothuis# According to Radio Reloj, Cuba will start DST on Midnight between March 31573797824cSEdwin Groothuis# 31 and April 1. 31583797824cSEdwin Groothuis# 31593797824cSEdwin Groothuis# Radio Reloj has the following info (Spanish): 31603797824cSEdwin Groothuis# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 31613797824cSEdwin Groothuis# 31623797824cSEdwin Groothuis# Our info on it: 31638d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 3164b6ef626aSEdwin Groothuis 3165e10f6502SEdwin Groothuis# From Steffen Thorsen (2012-11-03): 3166e10f6502SEdwin Groothuis# Radio Reloj and many other sources report that Cuba is changing back 3167e10f6502SEdwin Groothuis# to standard time on 2012-11-04: 3168e10f6502SEdwin Groothuis# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 3169e10f6502SEdwin Groothuis# From Paul Eggert (2012-11-03): 3170e10f6502SEdwin Groothuis# For now, assume the future rule is first Sunday in November. 3171e10f6502SEdwin Groothuis 317212a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 31731315084cSEdwin GroothuisRule Cuba 1928 only - Jun 10 0:00 1:00 D 31741315084cSEdwin GroothuisRule Cuba 1928 only - Oct 10 0:00 0 S 31751315084cSEdwin GroothuisRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 31761315084cSEdwin GroothuisRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 31771315084cSEdwin GroothuisRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 31781315084cSEdwin GroothuisRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 31791315084cSEdwin GroothuisRule Cuba 1965 only - Jun 1 0:00 1:00 D 31801315084cSEdwin GroothuisRule Cuba 1965 only - Sep 30 0:00 0 S 31811315084cSEdwin GroothuisRule Cuba 1966 only - May 29 0:00 1:00 D 31821315084cSEdwin GroothuisRule Cuba 1966 only - Oct 2 0:00 0 S 31831315084cSEdwin GroothuisRule Cuba 1967 only - Apr 8 0:00 1:00 D 31841315084cSEdwin GroothuisRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 31851315084cSEdwin GroothuisRule Cuba 1968 only - Apr 14 0:00 1:00 D 31861315084cSEdwin GroothuisRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 31871315084cSEdwin GroothuisRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 31881315084cSEdwin GroothuisRule Cuba 1972 1974 - Oct 8 0:00 0 S 31891315084cSEdwin GroothuisRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 31901315084cSEdwin GroothuisRule Cuba 1978 only - May 7 0:00 1:00 D 31911315084cSEdwin GroothuisRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 31921315084cSEdwin GroothuisRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 31931315084cSEdwin GroothuisRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 31941315084cSEdwin GroothuisRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 31951315084cSEdwin GroothuisRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 31961315084cSEdwin GroothuisRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 31971315084cSEdwin GroothuisRule Cuba 1996 only - Oct 6 0:00s 0 S 31981315084cSEdwin GroothuisRule Cuba 1997 only - Oct 12 0:00s 0 S 31991315084cSEdwin GroothuisRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 32001315084cSEdwin GroothuisRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 3201668615cdSEdwin GroothuisRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 3202668615cdSEdwin GroothuisRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 3203550d397eSEdwin GroothuisRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 32041315084cSEdwin GroothuisRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 32051315084cSEdwin GroothuisRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 3206b6ef626aSEdwin GroothuisRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 3207b6ef626aSEdwin GroothuisRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 3208550d397eSEdwin GroothuisRule Cuba 2011 only - Nov 13 0:00s 0 S 32093797824cSEdwin GroothuisRule Cuba 2012 only - Apr 1 0:00s 1:00 D 3210e10f6502SEdwin GroothuisRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 32113797824cSEdwin GroothuisRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 32121315084cSEdwin Groothuis 32132865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 32141315084cSEdwin GroothuisZone America/Havana -5:29:28 - LMT 1890 32151315084cSEdwin Groothuis -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 32161315084cSEdwin Groothuis -5:00 Cuba C%sT 32171315084cSEdwin Groothuis 32181315084cSEdwin Groothuis# Dominican Republic 32191315084cSEdwin Groothuis 32201315084cSEdwin Groothuis# From Steffen Thorsen (2000-10-30): 32211315084cSEdwin Groothuis# Enrique Morales reported to me that the Dominican Republic has changed the 32221315084cSEdwin Groothuis# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 32231315084cSEdwin Groothuis# http://www.listin.com.do/antes/261000/republica/princi.html 32241315084cSEdwin Groothuis 32251315084cSEdwin Groothuis# From Paul Eggert (2000-12-04): 32261315084cSEdwin Groothuis# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 32271315084cSEdwin Groothuis 32281315084cSEdwin Groothuis# From Rives McDow (2000-12-01): 32291315084cSEdwin Groothuis# Dominican Republic changed its mind and presidential decree on Tuesday, 32301315084cSEdwin Groothuis# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 32311315084cSEdwin Groothuis# Dominican Republic will be reverting to 8 hours from the International Date 32321315084cSEdwin Groothuis# Line, and will not be using DST in the foreseeable future. The reason they 32331315084cSEdwin Groothuis# decided to use DST was to be in synch with Puerto Rico, who was also going 32341315084cSEdwin Groothuis# to implement DST. When Puerto Rico didn't implement DST, the president 32351315084cSEdwin Groothuis# decided to revert. 32361315084cSEdwin Groothuis 32371315084cSEdwin Groothuis 323812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3239dc135c6eSBaptiste DaroussinRule DR 1966 only - Oct 30 0:00 1:00 EDT 3240dc135c6eSBaptiste DaroussinRule DR 1967 only - Feb 28 0:00 0 EST 3241dc135c6eSBaptiste DaroussinRule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 3242dc135c6eSBaptiste DaroussinRule DR 1970 only - Feb 21 0:00 0 EST 3243dc135c6eSBaptiste DaroussinRule DR 1971 only - Jan 20 0:00 0 EST 3244dc135c6eSBaptiste DaroussinRule DR 1972 1974 - Jan 21 0:00 0 EST 32452865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 32461315084cSEdwin GroothuisZone America/Santo_Domingo -4:39:36 - LMT 1890 32471315084cSEdwin Groothuis -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3248dc135c6eSBaptiste Daroussin -5:00 DR %s 1974 Oct 27 32497ce0f064SEdwin Groothuis -4:00 - AST 2000 Oct 29 2:00 32507ce0f064SEdwin Groothuis -5:00 US E%sT 2000 Dec 3 1:00 32511315084cSEdwin Groothuis -4:00 - AST 32521315084cSEdwin Groothuis 32531315084cSEdwin Groothuis# El Salvador 32541315084cSEdwin Groothuis 325512a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 32561315084cSEdwin GroothuisRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 32571315084cSEdwin GroothuisRule Salv 1987 1988 - Sep lastSun 0:00 0 S 32581315084cSEdwin Groothuis# There are too many San Salvadors elsewhere, so use America/El_Salvador 32591315084cSEdwin Groothuis# instead of America/San_Salvador. 32602865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 32611315084cSEdwin GroothuisZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 32621315084cSEdwin Groothuis -6:00 Salv C%sT 32631315084cSEdwin Groothuis 32641315084cSEdwin Groothuis# Guatemala 32651315084cSEdwin Groothuis# 32661315084cSEdwin Groothuis# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 32671315084cSEdwin Groothuis# Diario Co Latino, at 3268eb1c1a05SSergey Kandaurov# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 32691315084cSEdwin Groothuis# says in an article dated 2006-04-19 that the Guatemalan government had 32701315084cSEdwin Groothuis# decided on that date to advance official time by 60 minutes, to lessen the 32711315084cSEdwin Groothuis# impact of the elevated cost of oil.... Daylight saving time will last from 32721315084cSEdwin Groothuis# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 32731315084cSEdwin Groothuis# From Paul Eggert (2006-06-22): 32741315084cSEdwin Groothuis# The Ministry of Energy and Mines, press release CP-15/2006 32751315084cSEdwin Groothuis# (2006-04-19), says DST ends at 24:00. See 32767ce0f064SEdwin Groothuis# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 32771315084cSEdwin Groothuis 327812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 32791315084cSEdwin GroothuisRule Guat 1973 only - Nov 25 0:00 1:00 D 32801315084cSEdwin GroothuisRule Guat 1974 only - Feb 24 0:00 0 S 32811315084cSEdwin GroothuisRule Guat 1983 only - May 21 0:00 1:00 D 32821315084cSEdwin GroothuisRule Guat 1983 only - Sep 22 0:00 0 S 32831315084cSEdwin GroothuisRule Guat 1991 only - Mar 23 0:00 1:00 D 32841315084cSEdwin GroothuisRule Guat 1991 only - Sep 7 0:00 0 S 32851315084cSEdwin GroothuisRule Guat 2006 only - Apr 30 0:00 1:00 D 32861315084cSEdwin GroothuisRule Guat 2006 only - Oct 1 0:00 0 S 32872865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 32881315084cSEdwin GroothuisZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 32891315084cSEdwin Groothuis -6:00 Guat C%sT 32901315084cSEdwin Groothuis 32911315084cSEdwin Groothuis# Haiti 32921315084cSEdwin Groothuis# From Gwillim Law (2005-04-15): 3293eb1c1a05SSergey Kandaurov# Risto O. Nykänen wrote me that Haiti is now on DST. 3294eb1c1a05SSergey Kandaurov# I searched for confirmation, and I found a press release 32951315084cSEdwin Groothuis# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3296eb1c1a05SSergey Kandaurov# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 32971315084cSEdwin Groothuis# 32981315084cSEdwin Groothuis# "The Prime Minister's Communication Office notifies the public in general 32991315084cSEdwin Groothuis# and the press in particular that, following a decision of the Interior 33001315084cSEdwin Groothuis# Ministry and the Territorial Collectivities [I suppose that means the 33011315084cSEdwin Groothuis# provinces], Haiti will move to Eastern Daylight Time in the night from next 33021315084cSEdwin Groothuis# Saturday the 2nd to Sunday the 3rd. 33031315084cSEdwin Groothuis# 33041315084cSEdwin Groothuis# "Consequently, the Prime Minister's Communication Office wishes to inform 33051315084cSEdwin Groothuis# the population that the country's clocks will be set forward one hour 33061315084cSEdwin Groothuis# starting at midnight. This provision will hold until the last Saturday in 33071315084cSEdwin Groothuis# October 2005. 33081315084cSEdwin Groothuis# 33091315084cSEdwin Groothuis# "Port-au-Prince, March 31, 2005" 33101315084cSEdwin Groothuis# 33111315084cSEdwin Groothuis# From Steffen Thorsen (2006-04-04): 33121315084cSEdwin Groothuis# I have been informed by users that Haiti observes DST this year like 33131315084cSEdwin Groothuis# last year, so the current "only" rule for 2005 might be changed to a 33141315084cSEdwin Groothuis# "max" rule or to last until 2006. (Who knows if they will observe DST 33151315084cSEdwin Groothuis# next year or if they will extend their DST like US/Canada next year). 33161315084cSEdwin Groothuis# 33171315084cSEdwin Groothuis# I have found this article about it (in French): 33181315084cSEdwin Groothuis# http://www.haitipressnetwork.com/news.cfm?articleID=7612 33191315084cSEdwin Groothuis# 33201315084cSEdwin Groothuis# The reason seems to be an energy crisis. 33211315084cSEdwin Groothuis 33221315084cSEdwin Groothuis# From Stephen Colebourne (2007-02-22): 33231315084cSEdwin Groothuis# Some IATA info: Haiti won't be having DST in 2007. 33241315084cSEdwin Groothuis 33253797824cSEdwin Groothuis# From Steffen Thorsen (2012-03-11): 33263797824cSEdwin Groothuis# According to several news sources, Haiti will observe DST this year, 33273797824cSEdwin Groothuis# apparently using the same start and end date as USA/Canada. 33283797824cSEdwin Groothuis# So this means they have already changed their time. 33293797824cSEdwin Groothuis# 33303797824cSEdwin Groothuis# http://www.alterpresse.org/spip.php?article12510 33313797824cSEdwin Groothuis# http://radiovision2000haiti.net/home/?p=13253 33323797824cSEdwin Groothuis# 33333797824cSEdwin Groothuis# From Arthur David Olson (2012-03-11): 33343797824cSEdwin Groothuis# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 33353797824cSEdwin Groothuis# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3336eb185a68SEdwin Groothuis# Assume a US-style fall back as well. 3337eb185a68SEdwin Groothuis 3338eb185a68SEdwin Groothuis# From Steffen Thorsen (2013-03-10): 3339eb185a68SEdwin Groothuis# It appears that Haiti is observing DST this year as well, same rules 3340eb185a68SEdwin Groothuis# as US/Canada. They did it last year as well, and it looks like they 3341eb185a68SEdwin Groothuis# are going to observe DST every year now... 3342eb185a68SEdwin Groothuis# 3343eb185a68SEdwin Groothuis# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3344eb185a68SEdwin Groothuis# http://www.canalplushaiti.net/?p=6714 33451315084cSEdwin Groothuis 33468fdf5721SBaptiste Daroussin# From Steffen Thorsen (2016-03-12): 33478fdf5721SBaptiste Daroussin# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 33488fdf5721SBaptiste Daroussin# are not going on DST this year. Several other resources confirm this: ... 33498d7edd17SPhilip Paeps# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 33508d7edd17SPhilip Paeps# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 33518fdf5721SBaptiste Daroussin# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 33528fdf5721SBaptiste Daroussin 3353dc135c6eSBaptiste Daroussin# From Steffen Thorsen (2017-03-12): 3354dc135c6eSBaptiste Daroussin# We have received 4 mails from different people telling that Haiti 3355dc135c6eSBaptiste Daroussin# has started DST again today, and this source seems to confirm that, 3356dc135c6eSBaptiste Daroussin# I have not been able to find a more authoritative source: 3357dc135c6eSBaptiste Daroussin# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html 3358dc135c6eSBaptiste Daroussin 335912a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 33601315084cSEdwin GroothuisRule Haiti 1983 only - May 8 0:00 1:00 D 33611315084cSEdwin GroothuisRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 33621315084cSEdwin GroothuisRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 33631315084cSEdwin Groothuis# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 33641315084cSEdwin Groothuis# Go with IATA. 33651315084cSEdwin GroothuisRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 33661315084cSEdwin GroothuisRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 33671315084cSEdwin GroothuisRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 33681315084cSEdwin GroothuisRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 33698fdf5721SBaptiste DaroussinRule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 33708fdf5721SBaptiste DaroussinRule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3371dc135c6eSBaptiste DaroussinRule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D 3372dc135c6eSBaptiste DaroussinRule Haiti 2017 max - Nov Sun>=1 2:00 0 S 33732865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 33741315084cSEdwin GroothuisZone America/Port-au-Prince -4:49:20 - LMT 1890 33751315084cSEdwin Groothuis -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 33761315084cSEdwin Groothuis -5:00 Haiti E%sT 33771315084cSEdwin Groothuis 33781315084cSEdwin Groothuis# Honduras 33791315084cSEdwin Groothuis# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 33801315084cSEdwin Groothuis 33811315084cSEdwin Groothuis# From Paul Eggert (2006-05-05): 33821315084cSEdwin Groothuis# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 33831315084cSEdwin Groothuis# saying Honduras will start using DST midnight Saturday, effective 4 33841315084cSEdwin Groothuis# months until September. La Tribuna reported today 33851315084cSEdwin Groothuis# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 33861315084cSEdwin Groothuis# of Honduras, refused to back down on this. 33871315084cSEdwin Groothuis 3388eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2006-08-08): 33891315084cSEdwin Groothuis# It seems that Honduras has returned from DST to standard time this Monday at 33901315084cSEdwin Groothuis# 00:00 hours (prolonging Sunday to 25 hours duration). 33911315084cSEdwin Groothuis# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 33921315084cSEdwin Groothuis 33931315084cSEdwin Groothuis# From Paul Eggert (2006-08-08): 33947ce0f064SEdwin Groothuis# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 33957ce0f064SEdwin Groothuis# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 33961315084cSEdwin Groothuis# It mentions executive decree 18-2006. 33971315084cSEdwin Groothuis 33981315084cSEdwin Groothuis# From Steffen Thorsen (2006-08-17): 33991315084cSEdwin Groothuis# Honduras will observe DST from 2007 to 2009, exact dates are not 34001315084cSEdwin Groothuis# published, I have located this authoritative source: 34011315084cSEdwin Groothuis# http://www.presidencia.gob.hn/noticia.aspx?nId=47 34021315084cSEdwin Groothuis 34031315084cSEdwin Groothuis# From Steffen Thorsen (2007-03-30): 34041315084cSEdwin Groothuis# http://www.laprensahn.com/pais_nota.php?id04962=7386 34051315084cSEdwin Groothuis# So it seems that Honduras will not enter DST this year.... 34061315084cSEdwin Groothuis 340712a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 34081315084cSEdwin GroothuisRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 34091315084cSEdwin GroothuisRule Hond 1987 1988 - Sep lastSun 0:00 0 S 34101315084cSEdwin GroothuisRule Hond 2006 only - May Sun>=1 0:00 1:00 D 34111315084cSEdwin GroothuisRule Hond 2006 only - Aug Mon>=1 0:00 0 S 34122865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 34131315084cSEdwin GroothuisZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 34141315084cSEdwin Groothuis -6:00 Hond C%sT 34151315084cSEdwin Groothuis# 34161315084cSEdwin Groothuis# Great Swan I ceded by US to Honduras in 1972 34171315084cSEdwin Groothuis 34181315084cSEdwin Groothuis# Jamaica 3419c26a5802SEdwin Groothuis# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3420c26a5802SEdwin Groothuis# unspecified official document, and says "This time is used throughout the 34219f9fc6bbSPhilip Paeps# island". Go with Milne. 34227ce0f064SEdwin Groothuis# 34237ce0f064SEdwin Groothuis# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 34247ce0f064SEdwin Groothuis# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 34257ce0f064SEdwin Groothuis# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 34267ce0f064SEdwin Groothuis# Manley's supporters associated this act with Manley's nickname "Joshua" 34277ce0f064SEdwin Groothuis# (recall that in the Bible the sun stood still at Joshua's request), 34287ce0f064SEdwin Groothuis# and with the Rod of Correction which Manley said he had received from 34297ce0f064SEdwin Groothuis# Haile Selassie, Emperor of Ethiopia. See: 34307ce0f064SEdwin Groothuis# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 34317ce0f064SEdwin Groothuis# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 34327ce0f064SEdwin Groothuis# 34332865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 34349f9fc6bbSPhilip Paeps #STDOFF -5:07:10.41 343546bee4edSPhilip PaepsZone America/Jamaica -5:07:10 - LMT 1890 # Kingston 343646bee4edSPhilip Paeps -5:07:10 - KMT 1912 Feb # Kingston Mean Time 34377ce0f064SEdwin Groothuis -5:00 - EST 1974 34381315084cSEdwin Groothuis -5:00 US E%sT 1984 34391315084cSEdwin Groothuis -5:00 - EST 34401315084cSEdwin Groothuis 34411315084cSEdwin Groothuis# Martinique 34422865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 34431315084cSEdwin GroothuisZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 34442723c7ffSPhilip Paeps -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT 34451315084cSEdwin Groothuis -4:00 - AST 1980 Apr 6 34461315084cSEdwin Groothuis -4:00 1:00 ADT 1980 Sep 28 34471315084cSEdwin Groothuis -4:00 - AST 34481315084cSEdwin Groothuis 34491315084cSEdwin Groothuis# Nicaragua 34501315084cSEdwin Groothuis# 34511315084cSEdwin Groothuis# This uses Shanks & Pottenger for times before 2005. 34521315084cSEdwin Groothuis# 34531315084cSEdwin Groothuis# From Steffen Thorsen (2005-04-12): 34541315084cSEdwin Groothuis# I've got reports from 8 different people that Nicaragua just started 34551315084cSEdwin Groothuis# DST on Sunday 2005-04-10, in order to save energy because of 34561315084cSEdwin Groothuis# expensive petroleum. The exact end date for DST is not yet 34571315084cSEdwin Groothuis# announced, only "September" but some sites also say "mid-September". 34581315084cSEdwin Groothuis# Some background information is available on the President's official site: 34591315084cSEdwin Groothuis# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 34601315084cSEdwin Groothuis# The Decree, no 23-2005 is available here: 34611315084cSEdwin Groothuis# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf 34621315084cSEdwin Groothuis# 34631315084cSEdwin Groothuis# From Paul Eggert (2005-05-01): 34641315084cSEdwin Groothuis# The decree doesn't say anything about daylight saving, but for now let's 34651315084cSEdwin Groothuis# assume that it is daylight saving.... 34661315084cSEdwin Groothuis# 34671315084cSEdwin Groothuis# From Gwillim Law (2005-04-21): 34681315084cSEdwin Groothuis# The Associated Press story on the time change, which can be found at 34691315084cSEdwin Groothuis# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 34701315084cSEdwin Groothuis# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 34711315084cSEdwin Groothuis# time that a change of clocks was applied to save energy was in the year 2000 3472eb1c1a05SSergey Kandaurov# during the Arnoldo Alemán administration."... 34731315084cSEdwin Groothuis# The northamerica file says that Nicaragua has been on UTC-6 continuously 34741315084cSEdwin Groothuis# since December 1998. I wasn't able to find any details of Nicaraguan time 34751315084cSEdwin Groothuis# changes in 2000. Perhaps a note could be added to the northamerica file, to 34761315084cSEdwin Groothuis# the effect that we have indirect evidence that DST was observed in 2000. 34771315084cSEdwin Groothuis# 3478eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2005-11-02): 34791315084cSEdwin Groothuis# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 34801315084cSEdwin Groothuis# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 34811315084cSEdwin Groothuis# (2005-09-26) 34821315084cSEdwin Groothuis# 3483eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2006-05-05): 34841315084cSEdwin Groothuis# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 34851315084cSEdwin Groothuis# (my informal translation) 3486eb1c1a05SSergey Kandaurov# By order of the president of the republic, Enrique Bolaños, Nicaragua 34871315084cSEdwin Groothuis# advanced by sixty minutes their official time, yesterday at 2 in the 3488eb1c1a05SSergey Kandaurov# morning, and will stay that way until 30th of September. 34891315084cSEdwin Groothuis# 3490eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2006-09-30): 34911315084cSEdwin Groothuis# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 34921315084cSEdwin Groothuis# My informal translation runs: 34931315084cSEdwin Groothuis# The natural sun time is restored in all the national territory, in that the 34941315084cSEdwin Groothuis# time is returned one hour at 01:00 am of October 1 of 2006. 34951315084cSEdwin Groothuis# 349612a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 34971315084cSEdwin GroothuisRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 34981315084cSEdwin GroothuisRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 34991315084cSEdwin GroothuisRule Nic 2005 only - Apr 10 0:00 1:00 D 35001315084cSEdwin GroothuisRule Nic 2005 only - Oct Sun>=1 0:00 0 S 35011315084cSEdwin GroothuisRule Nic 2006 only - Apr 30 2:00 1:00 D 35021315084cSEdwin GroothuisRule Nic 2006 only - Oct Sun>=1 1:00 0 S 35032865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 35041315084cSEdwin GroothuisZone America/Managua -5:45:08 - LMT 1890 35051315084cSEdwin Groothuis -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 35061315084cSEdwin Groothuis -6:00 - CST 1973 May 35071315084cSEdwin Groothuis -5:00 - EST 1975 Feb 16 35081315084cSEdwin Groothuis -6:00 Nic C%sT 1992 Jan 1 4:00 35091315084cSEdwin Groothuis -5:00 - EST 1992 Sep 24 35101315084cSEdwin Groothuis -6:00 - CST 1993 35111315084cSEdwin Groothuis -5:00 - EST 1997 35121315084cSEdwin Groothuis -6:00 Nic C%sT 35131315084cSEdwin Groothuis 35149142a2a3SPhilip Paeps# Cayman Is 35151315084cSEdwin Groothuis# Panama 35169142a2a3SPhilip Paeps# 35179142a2a3SPhilip Paeps# Atikokan and Coral Harbour, Canada, match Panama since 1970. 35182865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 35191315084cSEdwin GroothuisZone America/Panama -5:18:08 - LMT 1890 3520eb1c1a05SSergey Kandaurov -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 35211315084cSEdwin Groothuis -5:00 - EST 35221315084cSEdwin Groothuis 35239142a2a3SPhilip Paeps# Anguilla 35249142a2a3SPhilip Paeps# Antigua & Barbuda 35259142a2a3SPhilip Paeps# Aruba 35269142a2a3SPhilip Paeps# Caribbean Netherlands 35279142a2a3SPhilip Paeps# Curaçao 35289142a2a3SPhilip Paeps# Dominica 35299142a2a3SPhilip Paeps# Grenada 35309142a2a3SPhilip Paeps# Guadeloupe 35319142a2a3SPhilip Paeps# Montserrat 35321315084cSEdwin Groothuis# Puerto Rico 35339142a2a3SPhilip Paeps# St Barthélemy 35349142a2a3SPhilip Paeps# St Kitts-Nevis 35359142a2a3SPhilip Paeps# Sint Maarten / St Martin 35369142a2a3SPhilip Paeps# St Lucia 35379142a2a3SPhilip Paeps# St Vincent & the Grenadines 35389142a2a3SPhilip Paeps# Trinidad & Tobago 35399142a2a3SPhilip Paeps# Virgin Is (UK & US) 35409142a2a3SPhilip Paeps# 3541c26a5802SEdwin Groothuis# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 35422865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 35431315084cSEdwin GroothuisZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 35441315084cSEdwin Groothuis -4:00 - AST 1942 May 3 35451315084cSEdwin Groothuis -4:00 US A%sT 1946 35461315084cSEdwin Groothuis -4:00 - AST 35471315084cSEdwin Groothuis 35481315084cSEdwin Groothuis# St Pierre and Miquelon 3549c26a5802SEdwin Groothuis# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 35502865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 35512723c7ffSPhilip PaepsZone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre 35521315084cSEdwin Groothuis -4:00 - AST 1980 May 3553dc135c6eSBaptiste Daroussin -3:00 - -03 1987 3554dc135c6eSBaptiste Daroussin -3:00 Canada -03/-02 35551315084cSEdwin Groothuis 35561315084cSEdwin Groothuis# Turks and Caicos 35571315084cSEdwin Groothuis# 35581315084cSEdwin Groothuis# From Chris Dunn in 35598d7edd17SPhilip Paeps# https://bugs.debian.org/415007 35601315084cSEdwin Groothuis# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 35611315084cSEdwin Groothuis# daylight saving dates for time changes have been adjusted to match 35621315084cSEdwin Groothuis# the recent U.S. change of dates. 35631315084cSEdwin Groothuis# 35641315084cSEdwin Groothuis# From Brian Inglis (2007-04-28): 35651315084cSEdwin Groothuis# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 35661315084cSEdwin Groothuis# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 35671315084cSEdwin Groothuis# rows before that there is an out of date entry for Oct: 35681315084cSEdwin Groothuis# "Eastern Standard Times Begins 2007 35691315084cSEdwin Groothuis# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 35701315084cSEdwin Groothuis# indicating that the normal ET rules are followed. 3571dc505d53SPhilip Paeps 35727ce0f064SEdwin Groothuis# From Paul Eggert (2014-08-19): 35738fdf5721SBaptiste Daroussin# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 35747ce0f064SEdwin Groothuis# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3575d61d836cSEdwin Groothuis# Model this as a switch from EST/EDT to AST ... 3576d61d836cSEdwin Groothuis# From Chris Walton (2014-11-04): 3577d61d836cSEdwin Groothuis# ... the TCI government appears to have delayed the switch to 3578d61d836cSEdwin Groothuis# "permanent daylight saving time" by one year.... 3579d61d836cSEdwin Groothuis# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 35801315084cSEdwin Groothuis# 35818d7edd17SPhilip Paeps# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: 35828d7edd17SPhilip Paeps# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) 35838d7edd17SPhilip Paeps# during the summer months and Standard Time, also known as Local 35848d7edd17SPhilip Paeps# Time, during the winter months with effect from April 2018 ... 35858d7edd17SPhilip Paeps# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 35868d7edd17SPhilip Paeps# From Paul Eggert (2017-08-26): 35878d7edd17SPhilip Paeps# The date of effect of the spring 2018 change appears to be March 11, 35888d7edd17SPhilip Paeps# which makes more sense. See: Hamilton D. Time change back 35898d7edd17SPhilip Paeps# by March 2018 for TCI. Magnetic Media. 2017-08-25. 35908d7edd17SPhilip Paeps# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ 35918d7edd17SPhilip Paeps# 3592dc505d53SPhilip Paeps# From P Chan (2020-11-27): 3593dc505d53SPhilip Paeps# Standard Time Declaration Order 2015 (L.N. 15/2015) 3594dc505d53SPhilip Paeps# http://online.fliphtml5.com/fizd/czin/#p=2 3595dc505d53SPhilip Paeps# 3596dc505d53SPhilip Paeps# Standard Time Declaration Order 2017 (L.N. 31/2017) 3597dc505d53SPhilip Paeps# http://online.fliphtml5.com/fizd/dmcu/#p=2 3598dc505d53SPhilip Paeps# 3599dc505d53SPhilip Paeps# From Tim Parenti (2020-12-05): 3600dc505d53SPhilip Paeps# Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m. 3601dc505d53SPhilip Paeps# on 11th March 2018", a precise interpretation here poses some problems. The 3602dc505d53SPhilip Paeps# order states that "the standard time to be observed throughout the Turks and 3603dc505d53SPhilip Paeps# Caicos Islands shall be the same time zone as the Eastern United States of 3604dc505d53SPhilip Paeps# America" and further clarifies "[f]or the avoidance of doubt" that it 3605dc505d53SPhilip Paeps# "applies to the Eastern Standard Time as well as any changes thereto for 3606dc505d53SPhilip Paeps# Daylight Saving Time." However, as clocks in Turks and Caicos approached 3607dc505d53SPhilip Paeps# 02:00 -04, and thus the declared implementation time, it was still 01:00 EST 3608dc505d53SPhilip Paeps# (-05), as DST in the Eastern US would not start until an hour later. 3609dc505d53SPhilip Paeps# 3610dc505d53SPhilip Paeps# Since it is unlikely that those on the islands switched their clocks twice in 3611dc505d53SPhilip Paeps# the span of an hour, we assume instead that the adoption of EDT actually took 3612dc505d53SPhilip Paeps# effect once clocks in the Eastern US had sprung forward, from 03:00 -04. 3613dc505d53SPhilip Paeps# This discrepancy only affects the time zone abbreviation and DST flag for the 3614dc505d53SPhilip Paeps# intervening hour, not wall clock times, as -04 was maintained throughout. 3615dc505d53SPhilip Paeps 36162865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 36171315084cSEdwin GroothuisZone America/Grand_Turk -4:44:32 - LMT 1890 36189f9fc6bbSPhilip Paeps #STDOFF -5:07:10.41 361946bee4edSPhilip Paeps -5:07:10 - KMT 1912 Feb # Kingston Mean Time 36207ce0f064SEdwin Groothuis -5:00 - EST 1979 3621dc505d53SPhilip Paeps -5:00 US E%sT 2015 Mar 8 2:00 36228d7edd17SPhilip Paeps -4:00 - AST 2018 Mar 11 3:00 36238d7edd17SPhilip Paeps -5:00 US E%sT 36241315084cSEdwin Groothuis 3625eb1c1a05SSergey Kandaurov# Local Variables: 3626eb1c1a05SSergey Kandaurov# coding: utf-8 3627eb1c1a05SSergey Kandaurov# End: 3628