1# This file is in the public domain, so clarified as of 2# 2009-05-17 by Arthur David Olson. 3 4# also includes Central America and the Caribbean 5 6# This file is by no means authoritative; if you think you know better, 7# go ahead and edit the file (and please send any changes to 8# tz@iana.org for general use in the future). For more, please see 9# the file CONTRIBUTING in the tz distribution. 10 11# From Paul Eggert (1999-03-22): 12# A reliable and entertaining source about time zones is 13# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 14 15############################################################################### 16 17# United States 18 19# From Paul Eggert (1999-03-31): 20# Howse writes (pp 121-125) that time zones were invented by 21# Professor Charles Ferdinand Dowd (1825-1904), 22# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 23# His pamphlet "A System of National Time for Railroads" (1870) 24# was the result of his proposals at the Convention of Railroad Trunk Lines 25# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 26# but in 1872-05 he moved the proposed origin to Greenwich. 27# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 28# and the most of the country soon followed suit. 29 30# From Paul Eggert (2005-04-16): 31# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 32# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 33 34# From Paul Eggert (2006-03-22): 35# A good source for time zone historical data in the US is 36# Thomas G. Shanks, The American Atlas (5th edition), 37# San Diego: ACS Publications, Inc. (1991). 38# Make sure you have the errata sheet; the book is somewhat useless without it. 39# It is the source for most of the pre-1991 US entries below. 40 41# From Paul Eggert (2001-03-06): 42# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 43# in his whimsical essay "An Economical Project for Diminishing the Cost 44# of Light" published in the Journal de Paris (1784-04-26). 45# Not everyone is happy with the results: 46# 47# I don't really care how time is reckoned so long as there is some 48# agreement about it, but I object to being told that I am saving 49# daylight when my reason tells me that I am doing nothing of the kind. 50# I even object to the implication that I am wasting something 51# valuable if I stay in bed after the sun has risen. As an admirer 52# of moonlight I resent the bossy insistence of those who want to 53# reduce my time for enjoying it. At the back of the Daylight Saving 54# scheme I detect the bony, blue-fingered hand of Puritanism, eager 55# to push people into bed earlier, and get them up earlier, to make 56# them healthy, wealthy and wise in spite of themselves. 57# 58# -- Robertson Davies, The diary of Samuel Marchbanks, 59# Clarke, Irwin (1947), XIX, Sunday 60# 61# For more about the first ten years of DST in the United States, see 62# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 63# (Carnegie Library of Pittsburgh, 1927). 64# http://www.clpgh.org/exhibit/dst.html 65# 66# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 67# However, DST was imposed by the Standard Time Act of 1918, which 68# was the first nationwide legal time standard, and apparently 69# time was just called "Standard Time" or "Daylight Saving Time". 70 71# From Arthur David Olson: 72# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 73# See, for example, the front page of the Saturday, 1974-10-26 74# and Sunday, 1974-10-27 editions of the Washington Post. 75 76# From Arthur David Olson: 77# Before the Uniform Time Act of 1966 took effect in 1967, observance of 78# Daylight Saving Time in the US was by local option, except during wartime. 79 80# From Arthur David Olson (2000-09-25): 81# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 82# In the introduction, Oboler spoke of "Eastern Peace Time." 83# An AltaVista search turned up: 84# http://rowayton.org/rhs/hstaug45.html 85# "When the time is announced over the radio now, it is 'Eastern Peace 86# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 87# (August 1945) by way of confirmation. 88 89# From Joseph Gallant citing 90# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 91# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 92# to switch to London for Attlee's address, but the American people 93# never got to hear his speech live. According to one press account, 94# CBS' Bob Trout was first to announce the word of Japan's surrender, 95# but a few seconds later, NBC, ABC and Mutual also flashed the word 96# of surrender, all of whom interrupting the bells of Big Ben in 97# London which were to precede Mr. Attlee's speech. 98 99# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 100# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 101# 102# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 103# Any announcement from Asia would reach St. John's New York newsroom on a 104# wire service teletype machine, which had prescribed signals for major news. 105# Associated Press, for example, would ring five bells before spewing out 106# typed copy of an important story, and 10 bells for news "of transcendental 107# importance." 108# 109# On Aug. 14, stalling while talking steadily into the NBC networks' open 110# microphone, St. John heard five bells and waited only to hear a sixth bell, 111# before announcing confidently: "Ladies and gentlemen, World War II is over. 112# The Japanese have agreed to our surrender terms." 113# 114# He had scored a 20-second scoop on other broadcasters. 115 116# From Arthur David Olson (2005-08-22): 117# Paul has been careful to use the "US" rules only in those locations 118# that are part of the United States; this reflects the real scope of 119# U.S. government action. So even though the "US" rules have changed 120# in the latest release, other countries won't be affected. 121 122# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 123Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 124Rule US 1918 1919 - Oct lastSun 2:00 0 S 125Rule US 1942 only - Feb 9 2:00 1:00 W # War 126Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 127Rule US 1945 only - Sep lastSun 2:00 0 S 128Rule US 1967 2006 - Oct lastSun 2:00 0 S 129Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 130Rule US 1974 only - Jan 6 2:00 1:00 D 131Rule US 1975 only - Feb 23 2:00 1:00 D 132Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 133Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 134Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 135Rule US 2007 max - Nov Sun>=1 2:00 0 S 136 137# From Arthur David Olson, 2005-12-19 138# We generate the files specified below to guard against old files with 139# obsolete information being left in the time zone binary directory. 140# We limit the list to names that have appeared in previous versions of 141# this time zone package. 142# We do these as separate Zones rather than as Links to avoid problems if 143# a particular place changes whether it observes DST. 144# We put these specifications here in the northamerica file both to 145# increase the chances that they'll actually get compiled and to 146# avoid the need to duplicate the US rules in another file. 147 148# Zone NAME GMTOFF RULES FORMAT [UNTIL] 149Zone EST -5:00 - EST 150Zone MST -7:00 - MST 151Zone HST -10:00 - HST 152Zone EST5EDT -5:00 US E%sT 153Zone CST6CDT -6:00 US C%sT 154Zone MST7MDT -7:00 US M%sT 155Zone PST8PDT -8:00 US P%sT 156 157# From Bob Devine (1988-01-28): 158# ...Alaska (and Hawaii) had the timezone names changed in 1967. 159# old new 160# Pacific Standard Time(PST) -same- 161# Yukon Standard Time(YST) -same- 162# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 163# Nome Standard Time (NT) Bering Standard Time (BST) 164# 165# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 166# The YST zone now covers nearly all of the state, AHST just part 167# of the Aleutian islands. No DST. 168 169# From Paul Eggert (1995-12-19): 170# The tables below use 'NST', not 'NT', for Nome Standard Time. 171# I invented 'CAWT' for Central Alaska War Time. 172 173# From U. S. Naval Observatory (1989-01-19): 174# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 175# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 176# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 177# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 178# USA MOUNTAIN 7 H BEHIND UTC DENVER 179# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 180# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 181# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 182# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 183# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 184# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 185# USA " 9 H BEHIND UTC APR 3 - OCT 30 186# USA HAWAII 10 H BEHIND UTC 187# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 188 189# From Arthur David Olson (1989-01-21): 190# The above dates are for 1988. 191# Note the "AKST" and "AKDT" abbreviations, the claim that there's 192# no DST in Samoa, and the claim that there is DST in Alaska and the 193# Aleutians. 194 195# From Arthur David Olson (1988-02-13): 196# Legal standard time zone names, from United States Code (1982 Edition and 197# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 198# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 199# took effect), as explained in sections 263 and 261: 200# (none) 201# United States standard eastern time 202# United States standard mountain time 203# United States standard central time 204# United States standard Pacific time 205# (none) 206# United States standard Alaska time 207# (none) 208# Next, names from 1967-04-01 until 1983-11-30 (the date for 209# public law 98-181): 210# Atlantic standard time 211# eastern standard time 212# central standard time 213# mountain standard time 214# Pacific standard time 215# Yukon standard time 216# Alaska-Hawaii standard time 217# Bering standard time 218# And after 1983-11-30: 219# Atlantic standard time 220# eastern standard time 221# central standard time 222# mountain standard time 223# Pacific standard time 224# Alaska standard time 225# Hawaii-Aleutian standard time 226# Samoa standard time 227# The law doesn't give abbreviations. 228# 229# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 230# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 231# for time in Guam and the Northern Marianas. See the file "australasia". 232# 233# From Paul Eggert (2015-04-17): 234# HST and HDT are standardized abbreviations for Hawaii-Aleutian 235# standard and daylight times. See section 9.47 (p 234) of the 236# U.S. Government Printing Office Style Manual (2008) 237# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 238 239# From Arthur David Olson, 2005-08-09 240# The following was signed into law on 2005-08-08. 241# 242# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 243# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 244# U.S.C. 260a(a)) is amended-- 245# (1) by striking "first Sunday of April" and inserting "second 246# Sunday of March"; and 247# (2) by striking "last Sunday of October" and inserting "first 248# Sunday of November'. 249# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 250# date of enactment of this Act or March 1, 2007, whichever is later. 251# (c) Report to Congress.--Not later than 9 months after the effective 252# date stated in subsection (b), the Secretary shall report to Congress 253# on the impact of this section on energy consumption in the United 254# States. 255# (d) Right to Revert.--Congress retains the right to revert the 256# Daylight Saving Time back to the 2005 time schedules once the 257# Department study is complete. 258 259# US eastern time, represented by New York 260 261# Connecticut, Delaware, District of Columbia, most of Florida, 262# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 263# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 264# New Hampshire, New Jersey, New York, North Carolina, Ohio, 265# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 266# Vermont, Virginia, West Virginia 267 268# From Dave Cantor (2004-11-02): 269# Early this summer I had the occasion to visit the Mount Washington 270# Observatory weather station atop (of course!) Mount Washington [, NH].... 271# One of the staff members said that the station was on Eastern Standard Time 272# and didn't change their clocks for Daylight Saving ... so that their 273# reports will always have times which are 5 hours behind UTC. 274 275# From Paul Eggert (2005-08-26): 276# According to today's Huntsville Times 277# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 278# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 279# in Russell County, Lanett in Chambers County and some towns in Lee County, 280# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 281# Roberts, city administrator in Phenix City. as saying "We are in the Central 282# time zone, but we do go by the Eastern time zone because so many people work 283# in Columbus." 284 285# From Paul Eggert (2014-09-06): 286# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 287# says that New York City Hall time was 3 minutes 58.4 seconds fast of 288# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 289# nearest second. 290 291# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 292Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 293Rule NYC 1920 only - Oct lastSun 2:00 0 S 294Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 295Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 296Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 297# Zone NAME GMTOFF RULES FORMAT [UNTIL] 298Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 299 -5:00 US E%sT 1920 300 -5:00 NYC E%sT 1942 301 -5:00 US E%sT 1946 302 -5:00 NYC E%sT 1967 303 -5:00 US E%sT 304 305# US central time, represented by Chicago 306 307# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 308# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 309# Washington counties), Illinois, western Indiana 310# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 311# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 312# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 313# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 314# western Tennessee, most of Texas, Wisconsin 315 316# From Larry M. Smith (2006-04-26) re Wisconsin: 317# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 318# is currently enforced at the 01:00 time of change. Because the local 319# "bar time" in the state corresponds to 02:00, a number of citations 320# are issued for the "sale of class 'B' alcohol after prohibited 321# hours" within the deviated hour of this change every year.... 322# 323# From Douglas R. Bomberg (2007-03-12): 324# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 325# Statue 175 closer in synch with the US Congress' intent.... 326# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 327 328# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 329# Fort Pierre is technically located in the Mountain time zone as is 330# the rest of Stanley County. Most of Stanley County and Fort Pierre 331# uses the Central time zone due to doing most of their business in 332# Pierre so it simplifies schedules. I have lived in Stanley County 333# all my life and it has been that way since I can remember. (43 years!) 334# 335# From Paul Eggert (2015-12-25): 336# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 337 338# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 339Rule Chicago 1920 only - Jun 13 2:00 1:00 D 340Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 341Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 342Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 343Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 344Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 345# Zone NAME GMTOFF RULES FORMAT [UNTIL] 346Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 347 -6:00 US C%sT 1920 348 -6:00 Chicago C%sT 1936 Mar 1 2:00 349 -5:00 - EST 1936 Nov 15 2:00 350 -6:00 Chicago C%sT 1942 351 -6:00 US C%sT 1946 352 -6:00 Chicago C%sT 1967 353 -6:00 US C%sT 354# Oliver County, ND switched from mountain to central time on 1992-10-25. 355Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 356 -7:00 US M%sT 1992 Oct 25 2:00 357 -6:00 US C%sT 358# Morton County, ND, switched from mountain to central time on 359# 2003-10-26, except for the area around Mandan which was already central time. 360# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 361# Officially this switch also included part of Sioux County, and 362# Jones, Mellette, and Todd Counties in South Dakota; 363# but in practice these other counties were already observing central time. 364# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 365Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 366 -7:00 US M%sT 2003 Oct 26 2:00 367 -6:00 US C%sT 368 369# From Josh Findley (2011-01-21): 370# ...it appears that Mercer County, North Dakota, changed from the 371# mountain time zone to the central time zone at the last transition from 372# daylight-saving to standard time (on Nov. 7, 2010): 373# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 374# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 375 376# From Andy Lipscomb (2011-01-24): 377# ...according to the Census Bureau, the largest city is Beulah (although 378# it's commonly referred to as Beulah-Hazen, with Hazen being the next 379# largest city in Mercer County). Google Maps places Beulah's city hall 380# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 381# of 6h47'07". 382 383Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 384 -7:00 US M%sT 2010 Nov 7 2:00 385 -6:00 US C%sT 386 387# US mountain time, represented by Denver 388# 389# Colorado, far western Kansas, Montana, western 390# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 391# New Mexico, southwestern North Dakota, 392# western South Dakota, far western Texas (El Paso County, Hudspeth County, 393# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 394# 395# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 396Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 397Rule Denver 1920 only - Oct lastSun 2:00 0 S 398Rule Denver 1921 only - May 22 2:00 0 S 399Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 400Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 401# Zone NAME GMTOFF RULES FORMAT [UNTIL] 402Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 403 -7:00 US M%sT 1920 404 -7:00 Denver M%sT 1942 405 -7:00 US M%sT 1946 406 -7:00 Denver M%sT 1967 407 -7:00 US M%sT 408 409# US Pacific time, represented by Los Angeles 410# 411# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 412# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 413# north of the Salmon River, and the towns of Burgdorf and Warren), 414# Nevada (except West Wendover), Oregon (except the northern 3/4 of 415# Malheur county), and Washington 416 417# From Paul Eggert (2016-08-20): 418# In early February 1948, in response to California's electricity shortage, 419# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 420# causing electric clocks to lose six minutes per day. (This did not change 421# legal time, and is not part of the data here.) See: 422# Ross SA. An energy crisis from the past: Northern California in 1948. 423# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 424# 1973-11. http://escholarship.org/uc/item/8x22k30c 425# 426# In another measure to save electricity, DST was instituted from 1948-03-14 427# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 428# the fallback transition earlier. See pages 3-4 of: 429# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 430# 431# In response: 432# 433# Governor Warren received a torrent of objecting mail, and it is not too much 434# to speculate that the objections to Daylight Saving Time were one important 435# factor in the defeat of the Dewey-Warren Presidential ticket in California. 436# -- Ross, p 25 437# 438# On December 8 the governor exercised the option, setting the date to January 1 439# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 440# 441# Despite the controversy, in 1949 California voters approved Proposition 12, 442# which established DST from April's last Sunday at 01:00 until September's 443# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 444# the fall-back date to October's last Sunday. See: 445# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 446# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 447# 448# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 449Rule CA 1948 only - Mar 14 2:01 1:00 D 450Rule CA 1949 only - Jan 1 2:00 0 S 451Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D 452Rule CA 1950 1961 - Sep lastSun 2:00 0 S 453Rule CA 1962 1966 - Oct lastSun 2:00 0 S 454# Zone NAME GMTOFF RULES FORMAT [UNTIL] 455Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 456 -8:00 US P%sT 1946 457 -8:00 CA P%sT 1967 458 -8:00 US P%sT 459 460# Alaska 461# AK%sT is the modern abbreviation for -9:00 per USNO. 462# 463# From Paul Eggert (2001-05-30): 464# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 465# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 466# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 467# also a Friday. Include only the time zone part of this transition, 468# ignoring the switch from Julian to Gregorian, since we can't represent 469# the Julian calendar. 470# 471# As far as we know, none of the exact locations mentioned below were 472# permanently inhabited in 1867 by anyone using either calendar. 473# (Yakutat was colonized by the Russians in 1799, but the settlement 474# was destroyed in 1805 by a Yakutat-kon war party.) However, there 475# were nearby inhabitants in some cases and for our purposes perhaps 476# it's best to simply use the official transition. 477 478# From Paul Eggert (2014-07-18): 479# One opinion of the early-1980s turmoil in Alaska over time zones and 480# daylight saving time appeared as graffiti on a Juneau airport wall: 481# "Welcome to Juneau. Please turn your watch back to the 19th century." 482# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 483# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 484# 485# Steve Ferguson (2011-01-31) referred to the following source: 486# Norris F. Keeping time in Alaska: national directives, local response. 487# Alaska History 2001;16(1-2). 488# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 489 490# From Arthur David Olson (2011-02-01): 491# Here's database-relevant material from the 2001 "Alaska History" article: 492# 493# On September 20 [1979]...DOT...officials decreed that on April 27, 494# 1980, Juneau and other nearby communities would move to Yukon Time. 495# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 496# Pacific Time. 497# 498# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 499# Department's September 1979 decision. Juneau and other communities in 500# northern Southeast reverted to Pacific Time on October 26. 501# 502# On October 28 [1983]...the Metlakatla Indian Community Council voted 503# unanimously to keep the reservation on Pacific Time. 504# 505# According to DOT official Joanne Petrie, Indian reservations are not 506# bound to follow time zones imposed by neighboring jurisdictions. 507# 508# (The last is consistent with how the database now handles the Navajo 509# Nation.) 510 511# From Arthur David Olson (2011-02-09): 512# I just spoke by phone with a staff member at the Metlakatla Indian 513# Community office (using contact information available at 514# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 515# It's shortly after 1:00 here on the east coast of the United States; 516# the staffer said it was shortly after 10:00 there. When I asked whether 517# that meant they were on Pacific time, they said no - they were on their 518# own time. I asked about daylight saving; they said it wasn't used. I 519# did not inquire about practices in the past. 520 521# From Arthur David Olson (2011-08-17): 522# For lack of better information, assume that Metlakatla's 523# abandonment of use of daylight saving resulted from the 1983 vote. 524 525# From Steffen Thorsen (2015-11-09): 526# It seems Metlakatla did go off PST on Sunday, November 1, changing 527# their time to AKST and are going to follow Alaska's DST, switching 528# between AKST and AKDT from now on.... 529# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 530 531# Zone NAME GMTOFF RULES FORMAT [UNTIL] 532Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 533 -8:57:41 - LMT 1900 Aug 20 12:00 534 -8:00 - PST 1942 535 -8:00 US P%sT 1946 536 -8:00 - PST 1969 537 -8:00 US P%sT 1980 Apr 27 2:00 538 -9:00 US Y%sT 1980 Oct 26 2:00 539 -8:00 US P%sT 1983 Oct 30 2:00 540 -9:00 US Y%sT 1983 Nov 30 541 -9:00 US AK%sT 542Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 543 -9:01:13 - LMT 1900 Aug 20 12:00 544 -8:00 - PST 1942 545 -8:00 US P%sT 1946 546 -8:00 - PST 1969 547 -8:00 US P%sT 1983 Oct 30 2:00 548 -9:00 US Y%sT 1983 Nov 30 549 -9:00 US AK%sT 550Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 551 -8:46:18 - LMT 1900 Aug 20 12:00 552 -8:00 - PST 1942 553 -8:00 US P%sT 1946 554 -8:00 - PST 1969 555 -8:00 US P%sT 1983 Oct 30 2:00 556 -8:00 - PST 2015 Nov 1 2:00 557 -9:00 US AK%sT 558Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 559 -9:18:55 - LMT 1900 Aug 20 12:00 560 -9:00 - YST 1942 561 -9:00 US Y%sT 1946 562 -9:00 - YST 1969 563 -9:00 US Y%sT 1983 Nov 30 564 -9:00 US AK%sT 565Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 566 -9:59:36 - LMT 1900 Aug 20 12:00 567 -10:00 - CAT 1942 568 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 569 -10:00 US CAT/CAPT 1946 # Peace 570 -10:00 - CAT 1967 Apr 571 -10:00 - AHST 1969 572 -10:00 US AH%sT 1983 Oct 30 2:00 573 -9:00 US Y%sT 1983 Nov 30 574 -9:00 US AK%sT 575Zone America/Nome 12:58:21 - LMT 1867 Oct 18 576 -11:01:38 - LMT 1900 Aug 20 12:00 577 -11:00 - NST 1942 578 -11:00 US N%sT 1946 579 -11:00 - NST 1967 Apr 580 -11:00 - BST 1969 581 -11:00 US B%sT 1983 Oct 30 2:00 582 -9:00 US Y%sT 1983 Nov 30 583 -9:00 US AK%sT 584Zone America/Adak 12:13:21 - LMT 1867 Oct 18 585 -11:46:38 - LMT 1900 Aug 20 12:00 586 -11:00 - NST 1942 587 -11:00 US N%sT 1946 588 -11:00 - NST 1967 Apr 589 -11:00 - BST 1969 590 -11:00 US B%sT 1983 Oct 30 2:00 591 -10:00 US AH%sT 1983 Nov 30 592 -10:00 US H%sT 593# The following switches don't quite make our 1970 cutoff. 594# 595# Shanks writes that part of southwest Alaska (e.g. Aniak) 596# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 597# and another part (e.g. Akiak) made the same switch five weeks later. 598# 599# From David Flater (2004-11-09): 600# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 601# Historic Preservation Commission, provided this information, which 602# suggests that Unalaska deviated from statutory time from early 1967 603# possibly until 1983: 604# 605# Minutes of the Unalaska City Council Meeting, January 10, 1967: 606# "Except for St. Paul and Akutan, Unalaska is the only important 607# location not on Alaska Standard Time. The following resolution was 608# made by William Robinson and seconded by Henry Swanson: Be it 609# resolved that the City of Unalaska hereby goes to Alaska Standard 610# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 611# January 14, Alaska Standard Time.) This resolution was passed with 612# three votes for and one against." 613 614# Hawaii 615 616# From Arthur David Olson (2010-12-09): 617# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 618# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 619# the article is available at 620# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 621# and indicates that standard time was adopted effective noon, January 622# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 623# saving for the period between the last Sunday of each April and the 624# last Sunday of each September, but less than a month later repealed the 625# act," (page 220), that year-round daylight saving time was in effect 626# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 627# when clocks changed) and that clocks were changed by 30 minutes 628# effective the second Sunday of June, 1947 (page 219, with no time of 629# day given for when clocks changed). A footnote for the 1933 changes 630# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 631# and Act 163 (approved 21 May 1933)." 632 633# From Arthur David Olson (2011-01-19): 634# The following is from "Laws of the Territory of Hawaii Passed by the 635# Seventeenth Legislature: Regular Session 1933," available (as of 636# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 637# 90...At 2 o'clock ante meridian of the last Sunday in April of each 638# year, the standard time of this Territory shall be advanced one 639# hour...This Act shall take effect upon its approval. Approved this 26th 640# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 641# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 642# hereby repealed...This Act shall take effect upon its approval, upon 643# which date the standard time of this Territory shall be restored to 644# that existing immediately prior to the taking effect of said Act 90. 645# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 646# of the Territory of Hawaii." 647# 648# Note that 1933-05-21 was a Sunday. 649# We're left to guess the time of day when Act 163 was approved; guess noon. 650 651# Zone NAME GMTOFF RULES FORMAT [UNTIL] 652Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 653 -10:30 - HST 1933 Apr 30 2:00 654 -10:30 1:00 HDT 1933 May 21 12:00 655 -10:30 - HST 1942 Feb 9 2:00 656 -10:30 1:00 HDT 1945 Sep 30 2:00 657 -10:30 - HST 1947 Jun 8 2:00 658 -10:00 - HST 659Link Pacific/Honolulu Pacific/Johnston 660 661# Now we turn to US areas that have diverged from the consensus since 1970. 662 663# Arizona mostly uses MST. 664 665# From Paul Eggert (2002-10-20): 666# 667# The information in the rest of this paragraph is derived from the 668# Daylight Saving Time web page 669# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 670# maintained by the Arizona State Library, Archives and Public Records. 671# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 672# time, but by federal law railroads, airlines, bus lines, military 673# personnel, and some engaged in interstate commerce continued to 674# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 675# Gazette says that was the date the law changed, and that 04-01 was 676# the date the state's clocks would change. In 1945 the State of 677# Arizona used standard time all year, again with exceptions only as 678# mandated by federal law. Arizona observed DST in 1967, but Arizona 679# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 680# 681# Shanks says the 1944 experiment came to an end on 1944-03-17. 682# Go with the Arizona State Library instead. 683 684# Zone NAME GMTOFF RULES FORMAT [UNTIL] 685Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 686 -7:00 US M%sT 1944 Jan 1 0:01 687 -7:00 - MST 1944 Apr 1 0:01 688 -7:00 US M%sT 1944 Oct 1 0:01 689 -7:00 - MST 1967 690 -7:00 US M%sT 1968 Mar 21 691 -7:00 - MST 692# From Arthur David Olson (1988-02-13): 693# A writer from the Inter Tribal Council of Arizona, Inc., 694# notes in private correspondence dated 1987-12-28 that "Presently, only the 695# Navajo Nation participates in the Daylight Saving Time policy, due to its 696# large size and location in three states." (The "only" means that other 697# tribal nations don't use DST.) 698# 699# From Paul Eggert (2013-08-26): 700# See America/Denver for a zone appropriate for the Navajo Nation. 701 702# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 703# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 704# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 705# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 706# Teton, Twin Falls, Valley, Washington counties, and the southern 707# quarter of Idaho county) and eastern Oregon (most of Malheur County) 708# switched four weeks late in 1974. 709# 710# Zone NAME GMTOFF RULES FORMAT [UNTIL] 711Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 712 -8:00 US P%sT 1923 May 13 2:00 713 -7:00 US M%sT 1974 714 -7:00 - MST 1974 Feb 3 2:00 715 -7:00 US M%sT 716 717# Indiana 718# 719# For a map of Indiana's time zone regions, see: 720# http://en.wikipedia.org/wiki/Time_in_Indiana 721# 722# From Paul Eggert (2007-08-17): 723# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 724# with the following exceptions: 725# 726# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 727# Vanderburgh, and Warrick counties have been like America/Chicago. 728# 729# - Dearborn and Ohio counties have been like America/New_York. 730# 731# - Clark, Floyd, and Harrison counties have been like 732# America/Kentucky/Louisville. 733# 734# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 735# and Switzerland counties have their own time zone histories as noted below. 736# 737# Shanks partitioned Indiana into 345 regions, each with its own time history, 738# and wrote "Even newspaper reports present contradictory information." 739# Those Hoosiers! Such a flighty and changeable people! 740# Fortunately, most of the complexity occurred before our cutoff date of 1970. 741# 742# Other than Indianapolis, the Indiana place names are so nondescript 743# that they would be ambiguous if we left them at the 'America' level. 744# So we reluctantly put them all in a subdirectory 'America/Indiana'. 745 746# From Paul Eggert (2014-06-26): 747# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 748# says "DOT is relocating the time zone boundary in Indiana to move Starke, 749# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 750# Eastern Time Zone to the Central Time Zone.... The effective date of 751# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 752# changeover date from standard time to Daylight Saving Time." 753# Strictly speaking, this meant the affected counties changed their 754# clocks twice that night, but this obviously was in error. The intent 755# was that 01:59:59 EST be followed by 02:00:00 CDT. 756 757# From Gwillim Law (2007-02-10): 758# The Associated Press has been reporting that Pulaski County, Indiana is 759# going to switch from Central to Eastern Time on March 11, 2007.... 760# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 761 762# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 763Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 764Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 765Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 766# Zone NAME GMTOFF RULES FORMAT [UNTIL] 767Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 768 -6:00 US C%sT 1920 769 -6:00 Indianapolis C%sT 1942 770 -6:00 US C%sT 1946 771 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 772 -5:00 - EST 1957 Sep 29 2:00 773 -6:00 - CST 1958 Apr 27 2:00 774 -5:00 - EST 1969 775 -5:00 US E%sT 1971 776 -5:00 - EST 2006 777 -5:00 US E%sT 778# 779# Eastern Crawford County, Indiana, left its clocks alone in 1974, 780# as well as from 1976 through 2005. 781# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 782Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 783Rule Marengo 1951 only - Sep lastSun 2:00 0 S 784Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 785Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 786# Zone NAME GMTOFF RULES FORMAT [UNTIL] 787Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 788 -6:00 US C%sT 1951 789 -6:00 Marengo C%sT 1961 Apr 30 2:00 790 -5:00 - EST 1969 791 -5:00 US E%sT 1974 Jan 6 2:00 792 -6:00 1:00 CDT 1974 Oct 27 2:00 793 -5:00 US E%sT 1976 794 -5:00 - EST 2006 795 -5:00 US E%sT 796# 797# Daviess, Dubois, Knox, and Martin Counties, Indiana, 798# switched from eastern to central time in April 2006, then switched back 799# in November 2007. 800# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 801Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 802Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 803Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 804Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 805Rule Vincennes 1955 only - May 1 0:00 1:00 D 806Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 807Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 808Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 809Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 810# Zone NAME GMTOFF RULES FORMAT [UNTIL] 811Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 812 -6:00 US C%sT 1946 813 -6:00 Vincennes C%sT 1964 Apr 26 2:00 814 -5:00 - EST 1969 815 -5:00 US E%sT 1971 816 -5:00 - EST 2006 Apr 2 2:00 817 -6:00 US C%sT 2007 Nov 4 2:00 818 -5:00 US E%sT 819# 820# Perry County, Indiana, switched from eastern to central time in April 2006. 821# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 822Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 823Rule Perry 1946 only - Sep lastSun 2:00 0 S 824Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 825Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 826Rule Perry 1955 only - May 1 0:00 1:00 D 827Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 828Rule Perry 1960 only - Oct lastSun 2:00 0 S 829Rule Perry 1961 only - Sep lastSun 2:00 0 S 830Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 831# Zone NAME GMTOFF RULES FORMAT [UNTIL] 832Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 833 -6:00 US C%sT 1946 834 -6:00 Perry C%sT 1964 Apr 26 2:00 835 -5:00 - EST 1969 836 -5:00 US E%sT 1971 837 -5:00 - EST 2006 Apr 2 2:00 838 -6:00 US C%sT 839# 840# Pike County, Indiana moved from central to eastern time in 1977, 841# then switched back in 2006, then switched back again in 2007. 842# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 843Rule Pike 1955 only - May 1 0:00 1:00 D 844Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 845Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 846Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 847# Zone NAME GMTOFF RULES FORMAT [UNTIL] 848Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 849 -6:00 US C%sT 1955 850 -6:00 Pike C%sT 1965 Apr 25 2:00 851 -5:00 - EST 1966 Oct 30 2:00 852 -6:00 US C%sT 1977 Oct 30 2:00 853 -5:00 - EST 2006 Apr 2 2:00 854 -6:00 US C%sT 2007 Nov 4 2:00 855 -5:00 US E%sT 856# 857# Starke County, Indiana moved from central to eastern time in 1991, 858# then switched back in 2006. 859# From Arthur David Olson (1991-10-28): 860# An article on page A3 of the Sunday, 1991-10-27 Washington Post 861# notes that Starke County switched from Central time to Eastern time as of 862# 1991-10-27. 863# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 864Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 865Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 866Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 867Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 868Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 869# Zone NAME GMTOFF RULES FORMAT [UNTIL] 870Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 871 -6:00 US C%sT 1947 872 -6:00 Starke C%sT 1962 Apr 29 2:00 873 -5:00 - EST 1963 Oct 27 2:00 874 -6:00 US C%sT 1991 Oct 27 2:00 875 -5:00 - EST 2006 Apr 2 2:00 876 -6:00 US C%sT 877# 878# Pulaski County, Indiana, switched from eastern to central time in 879# April 2006 and then switched back in March 2007. 880# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 881Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 882Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 883Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 884Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 885# Zone NAME GMTOFF RULES FORMAT [UNTIL] 886Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 887 -6:00 US C%sT 1946 888 -6:00 Pulaski C%sT 1961 Apr 30 2:00 889 -5:00 - EST 1969 890 -5:00 US E%sT 1971 891 -5:00 - EST 2006 Apr 2 2:00 892 -6:00 US C%sT 2007 Mar 11 2:00 893 -5:00 US E%sT 894# 895# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 896# Zone NAME GMTOFF RULES FORMAT [UNTIL] 897Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 898 -6:00 US C%sT 1954 Apr 25 2:00 899 -5:00 - EST 1969 900 -5:00 US E%sT 1973 901 -5:00 - EST 2006 902 -5:00 US E%sT 903 904# Part of Kentucky left its clocks alone in 1974. 905# This also includes Clark, Floyd, and Harrison counties in Indiana. 906# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 907Rule Louisville 1921 only - May 1 2:00 1:00 D 908Rule Louisville 1921 only - Sep 1 2:00 0 S 909Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 910Rule Louisville 1941 only - Sep lastSun 2:00 0 S 911Rule Louisville 1946 only - Jun 2 2:00 0 S 912Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 913Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 914# Zone NAME GMTOFF RULES FORMAT [UNTIL] 915Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 916 -6:00 US C%sT 1921 917 -6:00 Louisville C%sT 1942 918 -6:00 US C%sT 1946 919 -6:00 Louisville C%sT 1961 Jul 23 2:00 920 -5:00 - EST 1968 921 -5:00 US E%sT 1974 Jan 6 2:00 922 -6:00 1:00 CDT 1974 Oct 27 2:00 923 -5:00 US E%sT 924# 925# Wayne County, Kentucky 926# 927# From Lake Cumberland LIFE 928# http://www.lake-cumberland.com/life/archive/news990129time.shtml 929# (1999-01-29) via WKYM-101.7: 930# Clinton County has joined Wayne County in asking the DoT to change from 931# the Central to the Eastern time zone.... The Wayne County government made 932# the same request in December. And while Russell County officials have not 933# taken action, the majority of respondents to a poll conducted there in 934# August indicated they would like to change to "fast time" also. 935# The three Lake Cumberland counties are the farthest east of any U.S. 936# location in the Central time zone. 937# 938# From Rich Wales (2000-08-29): 939# After prolonged debate, and despite continuing deep differences of opinion, 940# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 941# (-0500) time. They won't "fall back" this year. See Sara Shipley, 942# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 943# 944# From Paul Eggert (2001-07-16): 945# The final rule was published in the 946# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 947# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 948# 949Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 950 -6:00 US C%sT 1946 951 -6:00 - CST 1968 952 -6:00 US C%sT 2000 Oct 29 2:00 953 -5:00 US E%sT 954 955 956# From Rives McDow (2000-08-30): 957# Here ... are all the changes in the US since 1985. 958# Kearny County, KS (put all of county on central; 959# previously split between MST and CST) ... 1990-10 960# Starke County, IN (from CST to EST) ... 1991-10 961# Oliver County, ND (from MST to CST) ... 1992-10 962# West Wendover, NV (from PST TO MST) ... 1999-10 963# Wayne County, KY (from CST to EST) ... 2000-10 964# 965# From Paul Eggert (2001-07-17): 966# We don't know where the line used to be within Kearny County, KS, 967# so omit that change for now. 968# See America/Indiana/Knox for the Starke County, IN change. 969# See America/North_Dakota/Center for the Oliver County, ND change. 970# West Wendover, NV officially switched from Pacific to mountain time on 971# 1999-10-31. See the 972# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 973# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 974# However, the Federal Register says that West Wendover already operated 975# on mountain time, and the rule merely made this official; 976# hence a separate tz entry is not needed. 977 978# Michigan 979# 980# From Bob Devine (1988-01-28): 981# Michigan didn't observe DST from 1968 to 1973. 982# 983# From Paul Eggert (1999-03-31): 984# Shanks writes that Michigan started using standard time on 1885-09-18, 985# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 986# that Detroit kept 987# 988# local time until 1900 when the City Council decreed that clocks should 989# be put back twenty-eight minutes to Central Standard Time. Half the 990# city obeyed, half refused. After considerable debate, the decision 991# was rescinded and the city reverted to Sun time. A derisive offer to 992# erect a sundial in front of the city hall was referred to the 993# Committee on Sewers. Then, in 1905, Central time was adopted 994# by city vote. 995# 996# This story is too entertaining to be false, so go with Howse over Shanks. 997# 998# From Paul Eggert (2001-03-06): 999# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1000# one hour in 1914." This change is not in Shanks. We have no more 1001# info, so omit this for now. 1002# 1003# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 1004# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1005Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 1006Rule Detroit 1948 only - Sep lastSun 2:00 0 S 1007Rule Detroit 1967 only - Jun 14 2:00 1:00 D 1008Rule Detroit 1967 only - Oct lastSun 2:00 0 S 1009# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1010Zone America/Detroit -5:32:11 - LMT 1905 1011 -6:00 - CST 1915 May 15 2:00 1012 -5:00 - EST 1942 1013 -5:00 US E%sT 1946 1014 -5:00 Detroit E%sT 1973 1015 -5:00 US E%sT 1975 1016 -5:00 - EST 1975 Apr 27 2:00 1017 -5:00 US E%sT 1018# 1019# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1020# switched from EST to CST/CDT in 1973. 1021# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1022Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1023Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1024Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1025Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1026# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1027Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1028 -6:00 US C%sT 1946 1029 -6:00 Menominee C%sT 1969 Apr 27 2:00 1030 -5:00 - EST 1973 Apr 29 2:00 1031 -6:00 US C%sT 1032 1033# Navassa 1034# administered by the US Fish and Wildlife Service 1035# claimed by US under the provisions of the 1856 Guano Islands Act 1036# also claimed by Haiti 1037# occupied 1857/1900 by the Navassa Phosphate Co 1038# US lighthouse 1917/1996-09 1039# currently uninhabited 1040# see Mark Fineman, "An Isle Rich in Guano and Discord", 1041# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1042# Jimmy Skaggs, _The Great Guano Rush_ (1994). 1043 1044################################################################################ 1045 1046 1047# From Paul Eggert (2014-10-31): 1048# 1049# Unless otherwise specified, the source for data through 1990 is: 1050# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1051# San Diego: ACS Publications, Inc. (2003). 1052# Unfortunately this book contains many errors and cites no sources. 1053# 1054# Gwillim Law writes that a good source 1055# for recent time zone data is the International Air Transport 1056# Association's Standard Schedules Information Manual (IATA SSIM), 1057# published semiannually. Law sent in several helpful summaries 1058# of the IATA's data after 1990. Except where otherwise noted, 1059# IATA SSIM is the source for entries after 1990. 1060# 1061# Other sources occasionally used include: 1062# 1063# Edward W. Whitman, World Time Differences, 1064# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1065# which I found in the UCLA library. 1066# 1067# William Willett, The Waste of Daylight, 19th edition 1068# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1069# [PDF] (1914-03) 1070# 1071# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1072# <http://www.jstor.org/stable/1774359>. 1073# 1074# See the 'europe' file for Greenland. 1075 1076# Canada 1077 1078# From Alain LaBonté (1994-11-14): 1079# I post here the time zone abbreviations standardized in Canada 1080# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1081# 1082# UTC Standard time Daylight saving time 1083# offset French English French English 1084# -2:30 - - HAT NDT 1085# -3 - - HAA ADT 1086# -3:30 HNT NST - - 1087# -4 HNA AST HAE EDT 1088# -5 HNE EST HAC CDT 1089# -6 HNC CST HAR MDT 1090# -7 HNR MST HAP PDT 1091# -8 HNP PST HAY YDT 1092# -9 HNY YST - - 1093# 1094# HN: Heure Normale ST: Standard Time 1095# HA: Heure Avancée DT: Daylight saving Time 1096# 1097# A: de l'Atlantique Atlantic 1098# C: du Centre Central 1099# E: de l'Est Eastern 1100# M: Mountain 1101# N: Newfoundland 1102# P: du Pacifique Pacific 1103# R: des Rocheuses 1104# T: de Terre-Neuve 1105# Y: du Yukon Yukon 1106# 1107# From Paul Eggert (1994-11-22): 1108# Alas, this sort of thing must be handled by localization software. 1109 1110# Unless otherwise specified, the data entries for Canada are all from Shanks 1111# & Pottenger. 1112 1113# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1114# 2007-03-01): 1115# The British Columbia government announced yesterday that it will 1116# adjust daylight savings next year to align with changes in the 1117# U.S. and the rest of Canada.... 1118# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1119# ... 1120# Nova Scotia 1121# Daylight saving time will be extended by four weeks starting in 2007.... 1122# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1123# 1124# [For New Brunswick] the new legislation dictates that the time change is to 1125# be done at 02:00 instead of 00:01. 1126# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1127# ... 1128# Manitoba has traditionally changed the clock every fall at 03:00. 1129# As of 2006, the transition is to take place one hour earlier at 02:00. 1130# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1131# ... 1132# [Alberta, Ontario, Quebec] will follow US rules. 1133# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1134# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1135# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1136# ... 1137# P.E.I. will follow US rules.... 1138# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1139# ... 1140# Province of Newfoundland and Labrador.... 1141# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1142# ... 1143# Yukon 1144# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1145# ... 1146# N.W.T. will follow US rules. Whoever maintains the government web site 1147# does not seem to believe in bookmarks. To see the news release, click the 1148# following link and search for "Daylight Savings Time Change". Press the 1149# "Daylight Savings Time Change" link; it will fire off a popup using 1150# JavaScript. 1151# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1152# ... 1153# Nunavut 1154# An amendment to the Interpretation Act was registered on February 19/2007.... 1155# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1156 1157# From Paul Eggert (2014-10-18): 1158# H. David Matthews and Mary Vincent's map 1159# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1160# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1161# contains detailed boundaries for regions observing nonstandard 1162# time and daylight saving time arrangements in Canada circa 1998. 1163# 1164# National Research Council Canada maintains info about time zones and DST. 1165# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1166# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1167# Its unofficial information is often taken from Matthews and Vincent. 1168 1169# From Paul Eggert (2006-06-27): 1170# For now, assume all of DST-observing Canada will fall into line with the 1171# new US DST rules, 1172 1173# From Chris Walton (2011-12-01) 1174# In the first of Tammy Hardwick's articles 1175# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1176# she quotes the Friday November 1/1918 edition of the Creston Review. 1177# The quote includes these two statements: 1178# 'Sunday the CPR went back to the old system of time...' 1179# '... The daylight saving scheme was dropped all over Canada at the same time,' 1180# These statements refer to a transition from daylight time to standard time 1181# that occurred nationally on Sunday October 27/1918. This transition was 1182# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1183 1184# In light of that evidence, we alter the date from the earlier believed 1185# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1186# than Thursday) in all Canadian rulesets. 1187 1188# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1189Rule Canada 1918 only - Apr 14 2:00 1:00 D 1190Rule Canada 1918 only - Oct 27 2:00 0 S 1191Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1192Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1193Rule Canada 1945 only - Sep 30 2:00 0 S 1194Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1195Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1196Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1197Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1198Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1199 1200 1201# Newfoundland and Labrador 1202 1203# From Paul Eggert (2000-10-02): 1204# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1205# but the only part of Labrador that follows the rules is the 1206# southeast corner, including Port Hope Simpson and Mary's Harbour, 1207# but excluding, say, Black Tickle. 1208 1209# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1210Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1211Rule StJohns 1917 only - Sep 17 2:00 0 S 1212# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1213Rule StJohns 1919 only - May 5 23:00 1:00 D 1214Rule StJohns 1919 only - Aug 12 23:00 0 S 1215# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1216Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1217Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1218# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1219# Pottenger. 1220Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1221Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1222# Whitman gives the following transitions: 1223# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1224# but go with Shanks & Pottenger and assume they used Canadian rules. 1225# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1226# Apr 30 - Sep 24; go with Shanks & Pottenger. 1227Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1228Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1229Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1230Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1231Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1232# From Paul Eggert (2000-10-02): 1233# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1234# at 00:01 local time. For now, assume it started in 1987. 1235 1236# From Michael Pelley (2011-09-12): 1237# We received today, Monday, September 12, 2011, notification that the 1238# changes to the Newfoundland Standard Time Act have been proclaimed. 1239# The change in the Act stipulates that the change from Daylight Savings 1240# Time to Standard Time and from Standard Time to Daylight Savings Time 1241# now occurs at 2:00AM. 1242# ... 1243# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1244# ... 1245# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1246# Office of the Chief Information Officer 1247# Executive Council 1248# Government of Newfoundland & Labrador 1249 1250Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1251Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1252Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1253Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1254Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1255Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1256# 1257# St John's has an apostrophe, but Posix file names can't have apostrophes. 1258# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1259Zone America/St_Johns -3:30:52 - LMT 1884 1260 -3:30:52 StJohns N%sT 1918 1261 -3:30:52 Canada N%sT 1919 1262 -3:30:52 StJohns N%sT 1935 Mar 30 1263 -3:30 StJohns N%sT 1942 May 11 1264 -3:30 Canada N%sT 1946 1265 -3:30 StJohns N%sT 2011 Nov 1266 -3:30 Canada N%sT 1267 1268# most of east Labrador 1269 1270# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1271# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1272Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1273 -3:30:52 - NST 1918 1274 -3:30:52 Canada N%sT 1919 1275 -3:30:52 - NST 1935 Mar 30 1276 -3:30 - NST 1936 1277 -3:30 StJohns N%sT 1942 May 11 1278 -3:30 Canada N%sT 1946 1279 -3:30 StJohns N%sT 1966 Mar 15 2:00 1280 -4:00 StJohns A%sT 2011 Nov 1281 -4:00 Canada A%sT 1282 1283 1284# west Labrador, Nova Scotia, Prince Edward I 1285 1286# From Brian Inglis (2015-07-20): 1287# From the historical weather station records available at: 1288# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1289# Sydney shares the same time history as Glace Bay, so was 1290# likely to be the same across the island.... 1291# Sydney, as the capital and most populous location, or Cape Breton, would 1292# have been better names for the zone had we known this in 1996. 1293 1294# From Paul Eggert (2015-07-20): 1295# Shanks & Pottenger write that since 1970 most of this region has been like 1296# Halifax. Many locales did not observe peacetime DST until 1972; 1297# the Cape Breton area, represented by Glace Bay, is the largest we know of 1298# (Glace Bay was perhaps not the best name choice but no point changing now). 1299# Shanks & Pottenger also write that Liverpool, NS was the only town 1300# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1301# this is a typo. 1302 1303# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1304Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1305Rule Halifax 1916 only - Oct 1 0:00 0 S 1306Rule Halifax 1920 only - May 9 0:00 1:00 D 1307Rule Halifax 1920 only - Aug 29 0:00 0 S 1308Rule Halifax 1921 only - May 6 0:00 1:00 D 1309Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1310Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1311Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1312Rule Halifax 1923 only - Sep 4 0:00 0 S 1313Rule Halifax 1924 only - Sep 15 0:00 0 S 1314Rule Halifax 1925 only - Sep 28 0:00 0 S 1315Rule Halifax 1926 only - May 16 0:00 1:00 D 1316Rule Halifax 1926 only - Sep 13 0:00 0 S 1317Rule Halifax 1927 only - May 1 0:00 1:00 D 1318Rule Halifax 1927 only - Sep 26 0:00 0 S 1319Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1320Rule Halifax 1928 only - Sep 9 0:00 0 S 1321Rule Halifax 1929 only - Sep 3 0:00 0 S 1322Rule Halifax 1930 only - Sep 15 0:00 0 S 1323Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1324Rule Halifax 1932 only - May 1 0:00 1:00 D 1325Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1326Rule Halifax 1933 only - Oct 2 0:00 0 S 1327Rule Halifax 1934 only - May 20 0:00 1:00 D 1328Rule Halifax 1934 only - Sep 16 0:00 0 S 1329Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1330Rule Halifax 1935 only - Sep 30 0:00 0 S 1331Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1332Rule Halifax 1936 only - Sep 14 0:00 0 S 1333Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1334Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1335Rule Halifax 1939 only - May 28 0:00 1:00 D 1336Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1337Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1338Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1339Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1340Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1341Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1342Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1343Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1344Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1345# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1346Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1347 -4:00 Halifax A%sT 1918 1348 -4:00 Canada A%sT 1919 1349 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1350 -4:00 Canada A%sT 1946 1351 -4:00 Halifax A%sT 1974 1352 -4:00 Canada A%sT 1353Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1354 -4:00 Canada A%sT 1953 1355 -4:00 Halifax A%sT 1954 1356 -4:00 - AST 1972 1357 -4:00 Halifax A%sT 1974 1358 -4:00 Canada A%sT 1359 1360# New Brunswick 1361 1362# From Paul Eggert (2007-01-31): 1363# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1364# says they changed at 00:01 through 2006, and 1365# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1366# clear that this was the case since at least 1993. 1367# For now, assume it started in 1993. 1368 1369# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1370Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1371Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1372Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1373Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1374Rule Moncton 1939 only - May 27 1:00 1:00 D 1375Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1376Rule Moncton 1940 only - May 19 1:00 1:00 D 1377Rule Moncton 1941 only - May 4 1:00 1:00 D 1378Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1379Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1380Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1381Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1382Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1383# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1384Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1385 -5:00 - EST 1902 Jun 15 1386 -4:00 Canada A%sT 1933 1387 -4:00 Moncton A%sT 1942 1388 -4:00 Canada A%sT 1946 1389 -4:00 Moncton A%sT 1973 1390 -4:00 Canada A%sT 1993 1391 -4:00 Moncton A%sT 2007 1392 -4:00 Canada A%sT 1393 1394# Quebec 1395 1396# From Paul Eggert (2015-03-24): 1397# See America/Toronto for most of Quebec, including Montreal. 1398# 1399# Matthews and Vincent (1998) also write that Quebec east of the -63 1400# meridian is supposed to observe AST, but residents as far east as 1401# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1402# The Quebec department of justice writes in 1403# "The situation in Minganie and Basse-Côte-Nord" 1404# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1405# that the coastal strip from just east of Natashquan to Blanc-Sablon 1406# observes Atlantic standard time all year round. 1407# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1408# says this common practice was codified into law as of 2007. 1409# For lack of better info, guess this practice began around 1970, contra to 1410# Shanks & Pottenger who have this region observing AST/ADT. 1411 1412# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1413Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1414 -4:00 Canada A%sT 1970 1415 -4:00 - AST 1416 1417# Ontario 1418 1419# From Paul Eggert (2006-07-09): 1420# Shanks & Pottenger write that since 1970 most of Ontario has been like 1421# Toronto. 1422# Thunder Bay skipped DST in 1973. 1423# Many smaller locales did not observe peacetime DST until 1974; 1424# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1425# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1426 1427# From Mark Brader (2003-07-26): 1428# [According to the Toronto Star] Orillia, Ontario, adopted DST 1429# effective Saturday, 1912-06-22, 22:00; the article mentions that 1430# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1431# have already done so. In Orillia DST was to run until Saturday, 1432# 1912-08-31 (no time mentioned), but it was met with considerable 1433# hostility from certain segments of the public, and was revoked after 1434# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1435# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1436# earlier in June). 1437# 1438# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1439 1440# From Paul Eggert (1997-10-17): 1441# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1442# says that Atikokan, Ontario currently does not observe DST, 1443# but will vote on 11-10 whether to use EST/EDT. 1444# He also writes that the Ontario Time Act (1990, Chapter T.9) 1445# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1446# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1447# Officially Atikokan is therefore on CST/CDT, and most likely this report 1448# concerns a non-official time observed as a matter of local practice. 1449# 1450# From Paul Eggert (2000-10-02): 1451# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1452# New Osnaburgh observe CST all year, that Big Trout Lake observes 1453# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1454# violation of the official Ontario rules. 1455# 1456# From Paul Eggert (2006-07-09): 1457# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1458# 2005-07-21 Chronicle-Journal, which said: 1459# 1460# The clocks in Atikokan stay set on standard time year-round. 1461# This means they spend about half the time on central time and 1462# the other half on eastern time. 1463# 1464# For the most part, the system works, Mayor Dennis Brown said. 1465# 1466# "The majority of businesses in Atikokan deal more with Eastern 1467# Canada, but there are some that deal with Western Canada," he 1468# said. "I don't see any changes happening here." 1469# 1470# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1471# [New Osnaburgh] follow the same practice." 1472 1473# From Garry McKinnon (2006-07-14) via Chris Walton: 1474# I chatted with a member of my board who has an outstanding memory 1475# and a long history in Atikokan (and in the telecom industry) and he 1476# can say for certain that Atikokan has been practicing the current 1477# time keeping since 1952, at least. 1478 1479# From Paul Eggert (2006-07-17): 1480# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1481# ever since standard time was introduced, but the information from 1482# McKinnon sounds more authoritative. For now, assume that Atikokan 1483# switched to EST immediately after WWII era daylight saving time 1484# ended. This matches the old (less-populous) America/Coral_Harbour 1485# entry since our cutoff date of 1970, so we can move 1486# America/Coral_Harbour to the 'backward' file. 1487 1488# From Mark Brader (2010-03-06): 1489# 1490# Currently the database has: 1491# 1492# # Ontario 1493# 1494# # From Paul Eggert (2006-07-09): 1495# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1496# # Toronto. 1497# # Thunder Bay skipped DST in 1973. 1498# # Many smaller locales did not observe peacetime DST until 1974; 1499# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1500# 1501# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1502# right corner of page 1, it says that Toronto will return to standard 1503# time at 2 am Sunday morning (which agrees with the database), and that: 1504# 1505# The one-hour setback will go into effect throughout most of Ontario, 1506# except in areas like Windsor which remains on standard time all year. 1507# 1508# Windsor is, of course, a lot larger than Nipigon. 1509# 1510# I only came across this incidentally. I don't know if Windsor began 1511# observing DST when Detroit did, or in 1974, or on some other date. 1512# 1513# By the way, the article continues by noting that: 1514# 1515# Some cities in the United States have pushed the deadline back 1516# three weeks and will change over from daylight saving in October. 1517 1518# From Arthur David Olson (2010-07-17): 1519# 1520# "Standard Time and Time Zones in Canada" appeared in 1521# The Journal of The Royal Astronomical Society of Canada, 1522# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1523# was available at 1524# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1525# 1526# It includes the text below (starting on page 57): 1527# 1528# A list of the places in Canada using daylight saving time would 1529# require yearly revision. From information kindly furnished by 1530# the provincial governments and by the postmasters in many cities 1531# and towns, it is found that the following places used daylight sav- 1532# ing in 1930. The information for the province of Quebec is definite, 1533# for the other provinces only approximate: 1534# 1535# Province Daylight saving time used 1536# Prince Edward Island Not used. 1537# Nova Scotia In Halifax only. 1538# New Brunswick In St. John only. 1539# Quebec In the following places: 1540# Montreal Lachine 1541# Quebec Mont-Royal 1542# Lévis Iberville 1543# St. Lambert Cap de la Madelèine 1544# Verdun Loretteville 1545# Westmount Richmond 1546# Outremont St. Jérôme 1547# Longueuil Greenfield Park 1548# Arvida Waterloo 1549# Chambly-Canton Beaulieu 1550# Melbourne La Tuque 1551# St. Théophile Buckingham 1552# Ontario Used generally in the cities and towns along 1553# the southerly part of the province. Not 1554# used in the northwesterly part. 1555# Manitoba Not used. 1556# Saskatchewan In Regina only. 1557# Alberta Not used. 1558# British Columbia Not used. 1559# 1560# With some exceptions, the use of daylight saving may be said to be limited 1561# to those cities and towns lying between Quebec city and Windsor, Ont. 1562 1563# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1564Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1565Rule Toronto 1919 only - Oct 26 0:00 0 S 1566Rule Toronto 1920 only - May 2 2:00 1:00 D 1567Rule Toronto 1920 only - Sep 26 0:00 0 S 1568Rule Toronto 1921 only - May 15 2:00 1:00 D 1569Rule Toronto 1921 only - Sep 15 2:00 0 S 1570Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1571# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1572# was meant. 1573Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1574Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1575# The 1927-to-1939 rules can be expressed more simply as 1576# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1577# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1578# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1579# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1580# The rules below avoid use of Sun>=25 1581# (which pre-2004 versions of zic cannot handle). 1582Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1583Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1584Rule Toronto 1932 only - May 1 2:00 1:00 D 1585Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1586Rule Toronto 1933 only - Oct 1 2:00 0 S 1587Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1588Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1589Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1590Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1591Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1592Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1593Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1594Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1595Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1596# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1597# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1598# is wrong, and that he had confirmed it by checking the 1971-10-30 1599# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1600Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1601 1602# From Paul Eggert (2003-07-27): 1603# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1604# Port Arthur, Ontario, the principle of the Bill has been in 1605# operation for the past three years, and in the City of Moose Jaw, 1606# Saskatchewan, for one year." 1607 1608# From David Bryan via Tory Tronrud, Director/Curator, 1609# Thunder Bay Museum (2003-11-12): 1610# There is some suggestion, however, that, by-law or not, daylight 1611# savings time was being practiced in Fort William and Port Arthur 1612# before 1909.... [I]n 1910, the line between the Eastern and Central 1613# Time Zones was permanently moved about two hundred miles west to 1614# include the Thunder Bay area.... When Canada adopted daylight 1615# savings time in 1916, Fort William and Port Arthur, having done so 1616# already, did not change their clocks.... During the Second World 1617# War,... [t]he cities agreed to implement DST during the summer 1618# months for the remainder of the war years. 1619 1620# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1621Zone America/Toronto -5:17:32 - LMT 1895 1622 -5:00 Canada E%sT 1919 1623 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1624 -5:00 Canada E%sT 1946 1625 -5:00 Toronto E%sT 1974 1626 -5:00 Canada E%sT 1627Zone America/Thunder_Bay -5:57:00 - LMT 1895 1628 -6:00 - CST 1910 1629 -5:00 - EST 1942 1630 -5:00 Canada E%sT 1970 1631 -5:00 Toronto E%sT 1973 1632 -5:00 - EST 1974 1633 -5:00 Canada E%sT 1634Zone America/Nipigon -5:53:04 - LMT 1895 1635 -5:00 Canada E%sT 1940 Sep 29 1636 -5:00 1:00 EDT 1942 Feb 9 2:00s 1637 -5:00 Canada E%sT 1638Zone America/Rainy_River -6:18:16 - LMT 1895 1639 -6:00 Canada C%sT 1940 Sep 29 1640 -6:00 1:00 CDT 1942 Feb 9 2:00s 1641 -6:00 Canada C%sT 1642Zone America/Atikokan -6:06:28 - LMT 1895 1643 -6:00 Canada C%sT 1940 Sep 29 1644 -6:00 1:00 CDT 1942 Feb 9 2:00s 1645 -6:00 Canada C%sT 1945 Sep 30 2:00 1646 -5:00 - EST 1647 1648 1649# Manitoba 1650 1651# From Rob Douglas (2006-04-06): 1652# the old Manitoba Time Act - as amended by Bill 2, assented to 1653# March 27, 1987 ... said ... 1654# "between two o'clock Central Standard Time in the morning of 1655# the first Sunday of April of each year and two o'clock Central 1656# Standard Time in the morning of the last Sunday of October next 1657# following, one hour in advance of Central Standard Time."... 1658# I believe that the English legislation [of the old time act] had 1659# been assented to (March 22, 1967).... 1660# Also, as far as I can tell, there was no order-in-council varying 1661# the time of Daylight Saving Time for 2005 and so the provisions of 1662# the 1987 version would apply - the changeover was at 2:00 Central 1663# Standard Time (i.e. not until 3:00 Central Daylight Time). 1664 1665# From Paul Eggert (2006-04-10): 1666# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1667# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1668# it was also 02:00s in 1966. 1669 1670# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1671Rule Winn 1916 only - Apr 23 0:00 1:00 D 1672Rule Winn 1916 only - Sep 17 0:00 0 S 1673Rule Winn 1918 only - Apr 14 2:00 1:00 D 1674Rule Winn 1918 only - Oct 27 2:00 0 S 1675Rule Winn 1937 only - May 16 2:00 1:00 D 1676Rule Winn 1937 only - Sep 26 2:00 0 S 1677Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1678Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1679Rule Winn 1945 only - Sep lastSun 2:00 0 S 1680Rule Winn 1946 only - May 12 2:00 1:00 D 1681Rule Winn 1946 only - Oct 13 2:00 0 S 1682Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1683Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1684Rule Winn 1950 only - May 1 2:00 1:00 D 1685Rule Winn 1950 only - Sep 30 2:00 0 S 1686Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1687Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1688Rule Winn 1959 only - Oct lastSun 2:00 0 S 1689Rule Winn 1960 only - Sep lastSun 2:00 0 S 1690Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1691Rule Winn 1963 only - Sep 22 2:00 0 S 1692Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1693Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1694Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1695# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1696Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1697 -6:00 Winn C%sT 2006 1698 -6:00 Canada C%sT 1699 1700 1701# Saskatchewan 1702 1703# From Mark Brader (2003-07-26): 1704# The first actual adoption of DST in Canada was at the municipal 1705# level. As the [Toronto] Star put it (1912-06-07), "While people 1706# elsewhere have long been talking of legislation to save daylight, 1707# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1708# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1709# presumably late evening, as below), and would run until "the end of 1710# the summer". The discrepancy between municipal time and railroad 1711# time was noted. 1712 1713# From Paul Eggert (2003-07-27): 1714# Willett (1914-03) notes that DST "has been in operation ... in the 1715# City of Moose Jaw, Saskatchewan, for one year." 1716 1717# From Paul Eggert (2006-03-22): 1718# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1719# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1720# Other western towns (e.g. Lloydminster) are like Edmonton. 1721# Matthews and Vincent (1998) write that Denare Beach and Creighton 1722# are like Winnipeg, in violation of Saskatchewan law. 1723 1724# From W. Jones (1992-11-06): 1725# The. . .below is based on information I got from our law library, the 1726# provincial archives, and the provincial Community Services department. 1727# A precise history would require digging through newspaper archives, and 1728# since you didn't say what you wanted, I didn't bother. 1729# 1730# Saskatchewan is split by a time zone meridian (105W) and over the years 1731# the boundary became pretty ragged as communities near it reevaluated 1732# their affiliations in one direction or the other. In 1965 a provincial 1733# referendum favoured legislating common time practices. 1734# 1735# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1736# Saskatchewan 1978) was proclaimed, and established that the eastern 1737# part of Saskatchewan would use CST year round, that districts in 1738# northwest Saskatchewan would by default follow CST but could opt to 1739# follow Mountain Time rules (thus 1 hour difference in the winter and 1740# zero in the summer), and that districts in southwest Saskatchewan would 1741# by default follow MT but could opt to follow CST. 1742# 1743# It took a few years for the dust to settle (I know one story of a town 1744# on one time zone having its school in another, such that a mom had to 1745# serve her family lunch in two shifts), but presently it seems that only 1746# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1747# rules any more; all other districts appear to have used CST year round 1748# since sometime in the 1960s. 1749 1750# From Chris Walton (2006-06-26): 1751# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1752# long and rather painful to read. 1753# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1754 1755# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1756Rule Regina 1918 only - Apr 14 2:00 1:00 D 1757Rule Regina 1918 only - Oct 27 2:00 0 S 1758Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1759Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1760Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1761Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1762Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1763Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1764Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1765Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1766Rule Regina 1945 only - Sep lastSun 2:00 0 S 1767Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1768Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1769Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1770Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1771Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1772Rule Regina 1959 only - Oct lastSun 2:00 0 S 1773# 1774Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1775Rule Swift 1957 only - Oct lastSun 2:00 0 S 1776Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1777Rule Swift 1959 only - Oct lastSun 2:00 0 S 1778Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1779# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1780Zone America/Regina -6:58:36 - LMT 1905 Sep 1781 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1782 -6:00 - CST 1783Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1784 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1785 -7:00 Regina M%sT 1950 1786 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1787 -6:00 - CST 1788 1789 1790# Alberta 1791 1792# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1793Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1794Rule Edm 1918 only - Oct 27 2:00 0 S 1795Rule Edm 1919 only - May 27 2:00 0 S 1796Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1797Rule Edm 1920 only - Oct lastSun 2:00 0 S 1798Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1799Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1800Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1801Rule Edm 1945 only - Sep lastSun 2:00 0 S 1802Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1803Rule Edm 1947 only - Sep lastSun 2:00 0 S 1804Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1805Rule Edm 1967 only - Oct lastSun 2:00 0 S 1806Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1807Rule Edm 1969 only - Oct lastSun 2:00 0 S 1808Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1809Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1810# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1811Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1812 -7:00 Edm M%sT 1987 1813 -7:00 Canada M%sT 1814 1815 1816# British Columbia 1817 1818# From Paul Eggert (2006-03-22): 1819# Shanks & Pottenger write that since 1970 most of this region has 1820# been like Vancouver. 1821# Dawson Creek uses MST. Much of east BC is like Edmonton. 1822# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1823 1824# It seems though that (re: Creston) is not entirely correct: 1825 1826# From Chris Walton (2011-12-01): 1827# There are two areas within the Canadian province of British Columbia 1828# that do not currently observe daylight saving: 1829# a) The Creston Valley (includes the town of Creston and surrounding area) 1830# b) The eastern half of the Peace River Regional District 1831# (includes the cities of Dawson Creek and Fort St. John) 1832 1833# Earlier this year I stumbled across a detailed article about the time 1834# keeping history of Creston; it was written by Tammy Hardwick who is the 1835# manager of the Creston & District Museum. The article was written in May 2009. 1836# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1837# According to the article, Creston has not changed its clocks since June 1918. 1838# i.e. Creston has been stuck on UTC-7 for 93 years. 1839# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1840 1841# Unfortunately the exact date for the time change in June 1918 remains 1842# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1843# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1844# as plausible as any other date (in June). She also said that after writing 1845# the article she had discovered another time change in 1916; this is the 1846# subject of another article which she wrote in October 2010. 1847# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1848 1849# Here is a summary of the three clock change events in Creston's history: 1850# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1851# Exact date unknown 1852# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1853# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1854# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1855# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1856# note 1: 1857# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1858# Creston did not change its clocks. 1859# note 2: 1860# During WWII when the Federal Government legislated a mandatory clock change, 1861# Creston did not oblige. 1862# note 3: 1863# There is no guarantee that Creston will remain on Mountain Standard Time 1864# (UTC-7) forever. 1865# The subject was debated at least once this year by the town Council. 1866# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1867 1868# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1869# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1870# summer time to cause the offset to be -7:00, the same as it had been before 1871# the change. It can be argued that the timezone abbreviation during this 1872# period should be PDT rather than MST, but that doesn't seem important enough 1873# (to anyone) to further complicate the rules. 1874 1875# The transition dates (and times) are guesses. 1876 1877# From Matt Johnson (2015-09-21): 1878# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1879# were aligned with America/Vancouver, they're now aligned with 1880# America/Dawson_Creek. 1881# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1882# 1883# From Tim Parenti (2015-09-23): 1884# This requires a new zone for the Northern Rockies Regional Municipality, 1885# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1886# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1887# been on MST (-0700) like Dawson Creek since it advanced its clocks on 1888# 2015-03-08. 1889# 1890# From Paul Eggert (2015-09-23): 1891# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1892 1893# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1894Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1895Rule Vanc 1918 only - Oct 27 2:00 0 S 1896Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1897Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1898Rule Vanc 1945 only - Sep 30 2:00 0 S 1899Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1900Rule Vanc 1946 only - Oct 13 2:00 0 S 1901Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1902Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1903# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1904Zone America/Vancouver -8:12:28 - LMT 1884 1905 -8:00 Vanc P%sT 1987 1906 -8:00 Canada P%sT 1907Zone America/Dawson_Creek -8:00:56 - LMT 1884 1908 -8:00 Canada P%sT 1947 1909 -8:00 Vanc P%sT 1972 Aug 30 2:00 1910 -7:00 - MST 1911Zone America/Fort_Nelson -8:10:47 - LMT 1884 1912 -8:00 Vanc P%sT 1946 1913 -8:00 - PST 1947 1914 -8:00 Vanc P%sT 1987 1915 -8:00 Canada P%sT 2015 Mar 8 2:00 1916 -7:00 - MST 1917Zone America/Creston -7:46:04 - LMT 1884 1918 -7:00 - MST 1916 Oct 1 1919 -8:00 - PST 1918 Jun 2 1920 -7:00 - MST 1921 1922# Northwest Territories, Nunavut, Yukon 1923 1924# From Paul Eggert (2006-03-22): 1925# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1926# Mathew Englander (1996-10-07) gives the following refs: 1927# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1928# c. 7 defines Yukon standard time as UTC-9.... 1929# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1930# [http://canlii.ca/t/7vhg] 1931# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1932# * O.I.C. 1980/02 established DST. 1933# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1934 1935# From Brian Inglis (2015-04-14): 1936# 1937# I tried to trace the history of Yukon time and found the following 1938# regulations, giving the reference title and URL if found, regulation name, 1939# and relevant quote if available. Each regulation specifically revokes its 1940# predecessor. The final reference is to the current Interpretation Act 1941# authorizing and resulting from these regulatory changes. 1942# 1943# Only recent regulations were retrievable via Yukon government site search or 1944# index, and only some via Canadian legal sources. Other sources used include 1945# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1946# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1947# 1970 quoted below; each article includes current extracts from provincial 1948# and territorial ST and DST regulations at the end, summaries and details of 1949# standard times and daylight saving time at many locations across Canada, 1950# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1951# and LMST; they also cover many countries and global locations, with a chart 1952# and table showing current Universal Time offsets, and may be useful as 1953# another source of information for 1970 and earlier. 1954# 1955# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 1956# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 1957# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 1958# Yukon Interpretation Ordinance 1959# Yukon standard time is the local mean time at the one hundred and 1960# thirty-fifth meridian. 1961# 1962# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 1963# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 1964# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 1965# Yukon Interpretation Ordinance, 1955, Chap. 16. 1966# 1967# (1) Subject to this section, standard time shall be reckoned as nine 1968# hours behind Greenwich Time and called Yukon Standard Time. 1969# 1970# (2) Notwithstanding subsection (1), the Commissioner may make regulations 1971# varying the manner of reckoning standard time. 1972# 1973# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 1974# http://? - no online source found 1975# 1976# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 1977# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 1978# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 1979# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 1980# 1981# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 1982# Territory on 27th January, 1966, is hereby revoked. 1983# 1984# 2. Yukon (East) Standard Time as defined by section 36 of the 1985# Interpretation Ordinance from and after mid-night on the 28th day of May, 1986# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 1987# is to say, eight hours behind Greenwich Time in the area of the Yukon 1988# Territory lying east of the 138th degree longitude west. 1989# 1990# 3. In the remainder of the Territory, lying west of the 138th degree 1991# longitude west, Yukon (West) Standard Time shall be reckoned as nine 1992# hours behind Greenwich Time. 1993# 1994# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 1995# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 1996# C.O. 1973/214 INTERPRETATION ACT ... 1997# 1998# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 1999# revoked. 2000# 2001# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2002# Act from and after midnight on the twenty-eighth day of October, 1973 2003# shall be reckoned in the same manner as Pacific Standard Time, that is 2004# to say eight hours behind Greenwich Time. 2005# 2006# * O.I.C. 1980/02 INTERPRETATION ACT 2007# http://? - no online source found 2008# 2009# * Yukon Daylight Saving Time, YOIC 1987/56 2010# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2011# O.I.C. 1987/056 INTERPRETATION ACT ... 2012# 2013# In every year between 2014# (a) two o'clock in the morning in the first Sunday in April, and 2015# (b) two o'clock in the morning in the last Sunday in October, 2016# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2017# called Yukon Daylight Saving Time. 2018# ... 2019# Dated ... 9th day of March, A.D., 1987. 2020# 2021# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2022# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2023# O.I.C. 2006/127 INTERPRETATION ACT ... 2024# 2025# 1. In Yukon each year the time for general purposes shall be 7 hours 2026# behind Greenwich mean time during the period commencing at two o'clock 2027# in the forenoon on the second Sunday of March and ending at two o'clock 2028# in the forenoon on the first Sunday of November and shall be called 2029# Yukon Daylight Saving Time. 2030# 2031# 2. Order-in-Council 1987/56 is revoked. 2032# 2033# 3. This order comes into force January 1, 2007. 2034# 2035# * Interpretation Act, RSY 2002, c 125 2036# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2037 2038# From Rives McDow (1999-09-04): 2039# Nunavut ... moved ... to incorporate the whole territory into one time zone. 2040# Nunavut moves to single time zone Oct. 31 2041# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 2042# 2043# From Antoine Leca (1999-09-06): 2044# We then need to create a new timezone for the Kitikmeot region of Nunavut 2045# to differentiate it from the Yellowknife region. 2046 2047# From Paul Eggert (1999-09-20): 2048# Basic Facts: The New Territory 2049# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2050# (1999) reports that Pangnirtung operates on eastern time, 2051# and that Coral Harbour does not observe DST. We don't know when 2052# Pangnirtung switched to eastern time; we'll guess 1995. 2053 2054# From Rives McDow (1999-11-08): 2055# On October 31, when the rest of Nunavut went to Central time, 2056# Pangnirtung wobbled. Here is the result of their wobble: 2057# 2058# The following businesses and organizations in Pangnirtung use Central Time: 2059# 2060# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2061# Eastern Arctic National Parks, A & D Specialist 2062# 2063# The following businesses and organizations in Pangnirtung use Eastern Time: 2064# 2065# Hamlet office, All other businesses, Both schools, Airport operator 2066# 2067# This has made for an interesting situation there, which warranted the news. 2068# No one there that I spoke with seems concerned, or has plans to 2069# change the local methods of keeping time, as it evidently does not 2070# really interfere with any activities or make things difficult locally. 2071# They plan to celebrate New Year's turn-over twice, one hour apart, 2072# so it appears that the situation will last at least that long. 2073# The Nunavut Intergovernmental Affairs hopes that they will "come to 2074# their senses", but the locals evidently don't see any problem with 2075# the current state of affairs. 2076 2077# From Michaela Rodrigue, writing in the 2078# Nunatsiaq News (1999-11-19): 2079# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2080# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2081# central - or Nunavut time - for government offices, and eastern time 2082# for municipal offices and schools.... Igloolik [was similar but then] 2083# made the switch to central time on Saturday, Nov. 6. 2084 2085# From Paul Eggert (2000-10-02): 2086# Matthews and Vincent (1998) say the following, but we lack histories 2087# for these potential new Zones. 2088# 2089# The Canadian Forces station at Alert uses Eastern Time while the 2090# handful of residents at the Eureka weather station [in the Central 2091# zone] skip daylight savings. Baffin Island, which is crossed by the 2092# Central, Eastern and Atlantic Time zones only uses Eastern Time. 2093# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2094# Central Time and Southampton Island [in the Central zone] is not 2095# required to use daylight savings. 2096 2097# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2098# Nunavut now has two time zones (2000-11-10): 2099# The Nunavut government would allow its employees in Kugluktuk and 2100# Cambridge Bay to operate on central time year-round, putting them 2101# one hour behind the rest of Nunavut for six months during the winter. 2102# At the end of October the two communities had rebelled against 2103# Nunavut's unified time zone, refusing to shift to eastern time with 2104# the rest of the territory for the winter. Cambridge Bay remained on 2105# central time, while Kugluktuk, even farther west, reverted to 2106# mountain time, which they had used before the advent of Nunavut's 2107# unified time zone in 1999. 2108# 2109# From Rives McDow (2001-01-20), quoting the Nunavut government: 2110# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2111 2112# From Paul Eggert (2000-12-04): 2113# Let's just keep track of the official times for now. 2114 2115# From Rives McDow (2001-03-07): 2116# The premier of Nunavut has issued a ministerial statement advising 2117# that effective 2001-04-01, the territory of Nunavut will revert 2118# back to three time zones (mountain, central, and eastern). Of the 2119# cities in Nunavut, Coral Harbor is the only one that I know of that 2120# has said it will not observe dst, staying on EST year round. I'm 2121# checking for more info, and will get back to you if I come up with 2122# more. 2123# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2124 2125# From Gwillim Law (2005-05-21): 2126# According to ... 2127# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2128# (from a 1998 Canadian Geographic article), the de facto and de jure time 2129# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2130# round. Using Google, it's easy to find other websites that confirm this. 2131# I wasn't able to find how far back this time regimen goes, but since it 2132# predates the creation of Nunavut, it probably goes back many years.... 2133# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2134# 2135# From Paul Eggert (2014-10-17): 2136# For lack of better information, assume that Southampton Island observed 2137# daylight saving only during wartime. Gwillim Law's email also 2138# mentioned maps now maintained by National Research Council Canada; 2139# see above for an up-to-date link. 2140 2141# From Chris Walton (2007-03-01): 2142# ... the community of Resolute (located on Cornwallis Island in 2143# Nunavut) moved from Central Time to Eastern Time last November. 2144# Basically the community did not change its clocks at the end of 2145# daylight saving.... 2146# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2147 2148# From Chris Walton (2011-03-21): 2149# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2150# Bay. Resolute Bay is a small community located about 900km north of 2151# the Arctic Circle. The zone file was required because Resolute Bay had 2152# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2153# 2154# According to new information which I received last week, Resolute Bay 2155# went back to using UTC-6 in the winter of 2007-2008... 2156# 2157# On March 11/2007 most of Canada went onto daylight saving. On March 2158# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2159# talked to somebody that was both knowledgeable and helpful. I was able 2160# to confirm that Resolute Bay was still operating on UTC-5. It was 2161# explained to me that Resolute Bay had been on the Eastern Time zone 2162# (EST) in the winter, and was now back on the Central Time zone (CDT). 2163# i.e. the time zone had changed twice in the last year but the clocks 2164# had not moved. The residents had to know which time zone they were in 2165# so they could follow the correct TV schedule... 2166# 2167# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2168# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2169# of the phone call, I decided to seek out an alternate source of 2170# information. I found an e-mail address for somebody by the name of 2171# Stephanie Adams whose job was listed as "Inns North Support Officer for 2172# Arctic Co-operatives." I was under the impression that Stephanie lived 2173# and worked in Resolute Bay... 2174# 2175# On March 14/2011 I phoned the hamlet office again. I was told that 2176# Resolute Bay had been using Central Standard Time over the winter of 2177# 2010-2011 and that the clocks had therefore been moved one hour ahead 2178# on March 13/2011. The person I talked to was aware that Resolute Bay 2179# had previously experimented with Eastern Standard Time but he could not 2180# tell me when the practice had stopped. 2181# 2182# On March 17/2011 I searched the Web to find an e-mail address of 2183# somebody that might be able to tell me exactly when Resolute Bay went 2184# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2185# used to be the mayor of Resolute Bay and he apparently owns half the 2186# businesses including "South Camp Inn." This website has some info on 2187# Aziz: 2188# http://www.uphere.ca/node/493 2189# 2190# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2191# Eastern Standard Time. 2192# 2193# Aziz responded quickly with this: "hi, The time was not changed for the 2194# 1 year only, the following year, the community went back to the old way 2195# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2196# the winter Zulu plus 6 hrs" 2197# 2198# This of course conflicted with everything I had ascertained in November 2008. 2199# 2200# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2201# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2202# may want to check with the weather office in Resolute Bay or do a 2203# search on the weather through Env. Canada. web site" 2204# 2205# If I had realized the Stephanie did not live in Resolute Bay I would 2206# never have contacted her. I now believe that all the information I 2207# obtained in November 2008 should be ignored... 2208# I apologize for reporting incorrect information in 2008. 2209 2210# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2211Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2212Rule NT_YK 1918 only - Oct 27 2:00 0 S 2213Rule NT_YK 1919 only - May 25 2:00 1:00 D 2214Rule NT_YK 1919 only - Nov 1 0:00 0 S 2215Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2216Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2217Rule NT_YK 1945 only - Sep 30 2:00 0 S 2218Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2219Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2220Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2221Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2222Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2223# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2224# aka Panniqtuuq 2225Zone America/Pangnirtung 0 - -00 1921 # trading post est. 2226 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2227 -5:00 Canada E%sT 1999 Oct 31 2:00 2228 -6:00 Canada C%sT 2000 Oct 29 2:00 2229 -5:00 Canada E%sT 2230# formerly Frobisher Bay 2231Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2232 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2233 -6:00 Canada C%sT 2000 Oct 29 2:00 2234 -5:00 Canada E%sT 2235# aka Qausuittuq 2236Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2237 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2238 -5:00 - EST 2001 Apr 1 3:00 2239 -6:00 Canada C%sT 2006 Oct 29 2:00 2240 -5:00 - EST 2007 Mar 11 3:00 2241 -6:00 Canada C%sT 2242# aka Kangiqiniq 2243Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2244 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2245 -5:00 - EST 2001 Apr 1 3:00 2246 -6:00 Canada C%sT 2247# aka Iqaluktuuttiaq 2248Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2249 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2250 -6:00 Canada C%sT 2000 Oct 29 2:00 2251 -5:00 - EST 2000 Nov 5 0:00 2252 -6:00 - CST 2001 Apr 1 3:00 2253 -7:00 Canada M%sT 2254Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2255 -7:00 NT_YK M%sT 1980 2256 -7:00 Canada M%sT 2257Zone America/Inuvik 0 - -00 1953 # Inuvik founded 2258 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2259 -7:00 NT_YK M%sT 1980 2260 -7:00 Canada M%sT 2261Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2262 -9:00 NT_YK Y%sT 1967 May 28 0:00 2263 -8:00 NT_YK P%sT 1980 2264 -8:00 Canada P%sT 2265Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2266 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2267 -8:00 NT_YK P%sT 1980 2268 -8:00 Canada P%sT 2269 2270 2271############################################################################### 2272 2273# Mexico 2274 2275# From Paul Eggert (2014-12-07): 2276# The Investigation and Analysis Service of the 2277# Mexican Library of Congress (MLoC) has published a 2278# history of Mexican local time (in Spanish) 2279# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2280# 2281# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2282# (In all cases we go with the MLoC.) 2283# S&P report that Baja was at -8:00 in 1922/1923. 2284# S&P say the 1930 transition in Baja was 1930-11-16. 2285# S&P report no DST during summer 1931. 2286# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2287 2288# From Gwillim Law (2001-02-20): 2289# There are some other discrepancies between the Decrees page and the 2290# tz database. I think they can best be explained by supposing that 2291# the researchers who prepared the Decrees page failed to find some of 2292# the relevant documents. 2293 2294# From Alan Perry (1996-02-15): 2295# A guy from our Mexico subsidiary finally found the Presidential Decree 2296# outlining the timezone changes in Mexico. 2297# 2298# ------------- Begin Forwarded Message ------------- 2299# 2300# I finally got my hands on the Official Presidential Decree that sets up the 2301# rules for the DST changes. The rules are: 2302# 2303# 1. The country is divided in 3 timezones: 2304# - Baja California Norte (the Mexico/BajaNorte TZ) 2305# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2306# - The rest of the country (the Mexico/General TZ) 2307# 2308# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2309# at 2:00 AM, the times in each zone are as follows: 2310# BajaNorte: GMT+7 2311# BajaSur: GMT+6 2312# General: GMT+5 2313# 2314# 3. The rest of the year, the times are as follows: 2315# BajaNorte: GMT+8 2316# BajaSur: GMT+7 2317# General: GMT+6 2318# 2319# The Decree was published in Mexico's Official Newspaper on January 4th. 2320# 2321# -------------- End Forwarded Message -------------- 2322# From Paul Eggert (1996-06-12): 2323# For an English translation of the decree, see 2324# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2325# http://mexico-travel.com/extra/timezone_eng.html 2326 2327# From Rives McDow (1998-10-08): 2328# The State of Quintana Roo has reverted back to central STD and DST times 2329# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2330 2331# From Rives McDow (2000-01-10): 2332# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2333# zone 5 hours from the International Date Line, and will not observe daylight 2334# savings time so as to stay on the same time zone as the southern part of 2335# Arizona year round. 2336 2337# From Jesper Nørgaard, translating 2338# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2339# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2340# Syndicate of Education Workers, refuse to apply daylight saving each 2341# year, so that the more than 10,000 schools work at normal hour the 2342# whole year. 2343 2344# From Gwillim Law (2001-01-19): 2345# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2346# (translated):... 2347# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2348# that Summer Time will be reduced from seven to five months, starting 2349# this year.... 2350# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2351# [translated], says "summer time will ... take effect on the first Sunday 2352# in May, and end on the last Sunday of September. 2353 2354# From Arthur David Olson (2001-01-25): 2355# The 2001-01-24 traditional Washington Post contained the page one 2356# story "Timely Issue Divides Mexicans."... 2357# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2358# ... Mexico City Mayor López Obrador "...is threatening to keep 2359# Mexico City and its 20 million residents on a different time than 2360# the rest of the country..." In particular, López Obrador would abolish 2361# observation of Daylight Saving Time. 2362 2363# Official statute published by the Energy Department 2364# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2365# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2366# and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2367 2368# From Paul Eggert (2001-03-03): 2369# 2370# http://www.latimes.com/news/nation/20010303/t000018766.html 2371# James F. Smith writes in today's LA Times 2372# * Sonora will continue to observe standard time. 2373# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2374# the Federal District will not adopt DST. 2375# * 4 of 16 district leaders announced they'll ignore the decree. 2376# * The decree does not affect federal-controlled facilities including 2377# the airport, banks, hospitals, and schools. 2378# 2379# For now we'll assume that the Federal District will bow to federal rules. 2380 2381# From Jesper Nørgaard (2001-04-01): 2382# I found some references to the Mexican application of daylight 2383# saving, which modifies what I had already sent you, stating earlier 2384# that a number of northern Mexican states would go on daylight 2385# saving. The modification reverts this to only cover Baja California 2386# (Norte), while all other states (except Sonora, who has no daylight 2387# saving all year) will follow the original decree of president 2388# Vicente Fox, starting daylight saving May 6, 2001 and ending 2389# September 30, 2001. 2390# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2391# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2392 2393# From Reuters (2001-09-04): 2394# Mexico's Supreme Court on Tuesday declared that daylight savings was 2395# unconstitutional in Mexico City, creating the possibility the 2396# capital will be in a different time zone from the rest of the nation 2397# next year.... The Supreme Court's ruling takes effect at 2:00 2398# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2399# standard time. "This is so residents of the Federal District are not 2400# subject to unexpected time changes," a statement from the court said. 2401 2402# From Jesper Nørgaard Welen (2002-03-12): 2403# ... consulting my local grocery store(!) and my coworkers, they all insisted 2404# that a new decision had been made to reinstate US style DST in Mexico.... 2405# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2406# confirms this. Sonora as usual is the only state where DST is not applied. 2407 2408# From Steffen Thorsen (2009-12-28): 2409# 2410# Steffen Thorsen wrote: 2411# > Mexico's House of Representatives has approved a proposal for northern 2412# > Mexico's border cities to share the same daylight saving schedule as 2413# > the United States. 2414# Now this has passed both the Congress and the Senate, so starting from 2415# 2010, some border regions will be the same: 2416# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2417# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2418# (Spanish) 2419# 2420# Could not find the new law text, but the proposed law text changes are here: 2421# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2422# (Gaceta Parlamentaria) 2423# 2424# There is also a list of the votes here: 2425# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2426# 2427# Our page: 2428# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2429 2430# From Arthur David Olson (2010-01-20): 2431# The page 2432# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2433# includes this text: 2434# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2435# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2436# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2437# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2438# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2439# horas del primer domingo de noviembre. 2440# En los municipios fronterizos que se encuentren ubicados en la franja 2441# fronteriza norte en el territorio comprendido entre la línea 2442# internacional y la línea paralela ubicada a una distancia de veinte 2443# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2444# interior del país, la aplicación de este horario estacional surtirá 2445# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2446# las dos horas del primer domingo de noviembre. 2447 2448# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2449# The Mexican state of Quintana Roo will likely change to EST in 2015. 2450# 2451# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2452# "With this change, the time conflict that has existed between the municipios 2453# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2454# end. The latter declared itself in rebellion 15 years ago when a time change 2455# was initiated in Mexico, and since then it has refused to change its time 2456# zone along with the rest of the country." 2457# 2458# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2459# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2460# "...the new time zone will come into effect at two o'clock on the first Sunday 2461# of February, when we will have to advance the clock one hour from its current 2462# time..." 2463# Also, the new zone will not use DST. 2464# 2465# From Carlos Raúl Perasso (2015-02-02): 2466# The decree that modifies the Mexican Hour System Law has finally 2467# been published at the Diario Oficial de la Federación 2468# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2469# It establishes 5 zones for Mexico: 2470# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2471# includes most of Mexico, excluding what's mentioned below. 2472# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the 2473# states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía 2474# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2475# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2476# state of Baja California. 2477# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2478# of Quintana Roo. 2479# 5- The islands, reefs and keys shall take their timezone from the 2480# longitude they are located at. 2481 2482# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2483Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2484Rule Mexico 1939 only - Jun 25 0:00 0 S 2485Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2486Rule Mexico 1941 only - Apr 1 0:00 0 S 2487Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2488Rule Mexico 1944 only - May 1 0:00 0 S 2489Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2490Rule Mexico 1950 only - Jul 30 0:00 0 S 2491Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2492Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2493Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2494Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2495Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2496Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2497# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2498# Quintana Roo; represented by Cancún 2499Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2500 -6:00 - CST 1981 Dec 23 2501 -5:00 Mexico E%sT 1998 Aug 2 2:00 2502 -6:00 Mexico C%sT 2015 Feb 1 2:00 2503 -5:00 - EST 2504# Campeche, Yucatán; represented by Mérida 2505Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2506 -6:00 - CST 1981 Dec 23 2507 -5:00 - EST 1982 Dec 2 2508 -6:00 Mexico C%sT 2509# Coahuila, Nuevo León, Tamaulipas (near US border) 2510# This includes the following municipalities: 2511# in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, 2512# Guerrero, Hidalgo. 2513# in Nuevo León: Anáhuac, Los Aldama. 2514# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, 2515# Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. 2516# See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, 2517# 2016-03-12 2518# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2519Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2520 -6:00 - CST 1988 2521 -6:00 US C%sT 1989 2522 -6:00 Mexico C%sT 2010 2523 -6:00 US C%sT 2524# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) 2525Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2526 -6:00 - CST 1988 2527 -6:00 US C%sT 1989 2528 -6:00 Mexico C%sT 2529# Central Mexico 2530Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2531 -7:00 - MST 1927 Jun 10 23:00 2532 -6:00 - CST 1930 Nov 15 2533 -7:00 - MST 1931 May 1 23:00 2534 -6:00 - CST 1931 Oct 2535 -7:00 - MST 1932 Apr 1 2536 -6:00 Mexico C%sT 2001 Sep 30 2:00 2537 -6:00 - CST 2002 Feb 20 2538 -6:00 Mexico C%sT 2539# Chihuahua (near US border) 2540# This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, 2541# Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2542# (See the 2016-03-12 El Universal source mentioned above.) 2543Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2544 -7:00 - MST 1927 Jun 10 23:00 2545 -6:00 - CST 1930 Nov 15 2546 -7:00 - MST 1931 May 1 23:00 2547 -6:00 - CST 1931 Oct 2548 -7:00 - MST 1932 Apr 1 2549 -6:00 - CST 1996 2550 -6:00 Mexico C%sT 1998 2551 -6:00 - CST 1998 Apr Sun>=1 3:00 2552 -7:00 Mexico M%sT 2010 2553 -7:00 US M%sT 2554# Chihuahua (away from US border) 2555Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2556 -7:00 - MST 1927 Jun 10 23:00 2557 -6:00 - CST 1930 Nov 15 2558 -7:00 - MST 1931 May 1 23:00 2559 -6:00 - CST 1931 Oct 2560 -7:00 - MST 1932 Apr 1 2561 -6:00 - CST 1996 2562 -6:00 Mexico C%sT 1998 2563 -6:00 - CST 1998 Apr Sun>=1 3:00 2564 -7:00 Mexico M%sT 2565# Sonora 2566Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2567 -7:00 - MST 1927 Jun 10 23:00 2568 -6:00 - CST 1930 Nov 15 2569 -7:00 - MST 1931 May 1 23:00 2570 -6:00 - CST 1931 Oct 2571 -7:00 - MST 1932 Apr 1 2572 -6:00 - CST 1942 Apr 24 2573 -7:00 - MST 1949 Jan 14 2574 -8:00 - PST 1970 2575 -7:00 Mexico M%sT 1999 2576 -7:00 - MST 2577 2578# From Alexander Krivenyshev (2010-04-21): 2579# According to news, Bahía de Banderas (Mexican state of Nayarit) 2580# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2581# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2582# 2583# (Spanish) 2584# Bahía de Banderas homologa su horario al del centro del 2585# país, a partir de este domingo 2586# http://www.nayarit.gob.mx/notes.asp?id=20748 2587# 2588# Bahía de Banderas homologa su horario con el del Centro del 2589# País 2590# 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 2591# 2592# (English) 2593# Puerto Vallarta and Bahía de Banderas: One Time Zone 2594# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2595# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2596# 2597# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2598# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2599# zone ..." 2600# Baja California Sur, Nayarit, Sinaloa 2601 2602# From Arthur David Olson (2010-05-01): 2603# Use "Bahia_Banderas" to keep the name to fourteen characters. 2604 2605# Mazatlán 2606Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2607 -7:00 - MST 1927 Jun 10 23:00 2608 -6:00 - CST 1930 Nov 15 2609 -7:00 - MST 1931 May 1 23:00 2610 -6:00 - CST 1931 Oct 2611 -7:00 - MST 1932 Apr 1 2612 -6:00 - CST 1942 Apr 24 2613 -7:00 - MST 1949 Jan 14 2614 -8:00 - PST 1970 2615 -7:00 Mexico M%sT 2616 2617# Bahía de Banderas 2618Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2619 -7:00 - MST 1927 Jun 10 23:00 2620 -6:00 - CST 1930 Nov 15 2621 -7:00 - MST 1931 May 1 23:00 2622 -6:00 - CST 1931 Oct 2623 -7:00 - MST 1932 Apr 1 2624 -6:00 - CST 1942 Apr 24 2625 -7:00 - MST 1949 Jan 14 2626 -8:00 - PST 1970 2627 -7:00 Mexico M%sT 2010 Apr 4 2:00 2628 -6:00 Mexico C%sT 2629 2630# Baja California 2631Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2632 -7:00 - MST 1924 2633 -8:00 - PST 1927 Jun 10 23:00 2634 -7:00 - MST 1930 Nov 15 2635 -8:00 - PST 1931 Apr 1 2636 -8:00 1:00 PDT 1931 Sep 30 2637 -8:00 - PST 1942 Apr 24 2638 -8:00 1:00 PWT 1945 Aug 14 23:00u 2639 -8:00 1:00 PPT 1945 Nov 12 # Peace 2640 -8:00 - PST 1948 Apr 5 2641 -8:00 1:00 PDT 1949 Jan 14 2642 -8:00 - PST 1954 2643 -8:00 CA P%sT 1961 2644 -8:00 - PST 1976 2645 -8:00 US P%sT 1996 2646 -8:00 Mexico P%sT 2001 2647 -8:00 US P%sT 2002 Feb 20 2648 -8:00 Mexico P%sT 2010 2649 -8:00 US P%sT 2650# From Paul Eggert (2006-03-22): 2651# Formerly there was an America/Ensenada zone, which differed from 2652# America/Tijuana only in that it did not observe DST from 1976 2653# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2654# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2655# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2656# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2657# DST-observance was a town-by-town matter back then. This concerns 2658# data after 1970 so most likely there should be at least one Zone 2659# other than America/Tijuana for Baja, but it's not clear yet what its 2660# name or contents should be. 2661# 2662# From Paul Eggert (2015-10-08): 2663# Formerly there was an America/Santa_Isabel zone, but this appears to 2664# have come from a misreading of 2665# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2666# It has been moved to the 'backward' file. 2667# 2668# 2669# Revillagigedo Is 2670# no information 2671 2672############################################################################### 2673 2674# Anguilla 2675# Antigua and Barbuda 2676# See America/Port_of_Spain. 2677 2678# Bahamas 2679# 2680# For 1899 Milne gives -5:09:29.5; round that. 2681# 2682# From Sue Williams (2006-12-07): 2683# The Bahamas announced about a month ago that they plan to change their DST 2684# rules to sync with the U.S. starting in 2007.... 2685# http://www.jonesbahamas.com/?c=45&a=10412 2686 2687# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2688Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2689Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2690# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2691Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2692 -5:00 Bahamas E%sT 1976 2693 -5:00 US E%sT 2694 2695# Barbados 2696 2697# For 1899 Milne gives -3:58:29.2; round that. 2698 2699# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2700Rule Barb 1977 only - Jun 12 2:00 1:00 D 2701Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2702Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2703Rule Barb 1979 only - Sep 30 2:00 0 S 2704Rule Barb 1980 only - Sep 25 2:00 0 S 2705# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2706Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2707 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2708 -4:00 Barb A%sT 2709 2710# Belize 2711# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2712# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2713Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2714Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2715Rule Belize 1973 only - Dec 5 0:00 1:00 D 2716Rule Belize 1974 only - Feb 9 0:00 0 S 2717Rule Belize 1982 only - Dec 18 0:00 1:00 D 2718Rule Belize 1983 only - Feb 12 0:00 0 S 2719# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2720Zone America/Belize -5:52:48 - LMT 1912 Apr 2721 -6:00 Belize C%sT 2722 2723# Bermuda 2724 2725# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2726# Bermuda dockyard, Ireland I; round that. 2727 2728# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2729 2730# Next year, however, clocks in the US will go forward on the second Sunday 2731# in March, until the first Sunday in November. And, after the Time Zone 2732# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2733# Friday, the same thing will happen in Bermuda. 2734# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2735 2736# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2737Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2738 -4:00 - AST 1974 Apr 28 2:00 2739 -4:00 Canada A%sT 1976 2740 -4:00 US A%sT 2741 2742# Cayman Is 2743# See America/Panama. 2744 2745# Costa Rica 2746 2747# Milne gives -5:36:13.3 as San José mean time; round to nearest. 2748 2749# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2750Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2751Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2752Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2753# IATA SSIM (1991-09) says the following was at 1:00; 2754# go with Shanks & Pottenger. 2755Rule CR 1991 only - Jul 1 0:00 0 S 2756Rule CR 1992 only - Mar 15 0:00 0 S 2757# There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2758# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2759Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2760 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2761 -6:00 CR C%sT 2762# Coco 2763# no information; probably like America/Costa_Rica 2764 2765# Cuba 2766 2767# From Paul Eggert (2013-02-21): 2768# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2769# for the port, and -5:30 for meteorological observations. 2770# For now, stick with Shanks & Pottenger. 2771 2772# From Arthur David Olson (1999-03-29): 2773# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2774# the Cuban National Team and the Baltimore Orioles was carried live on 2775# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2776# During the game, play-by-play announcer Jim Hunter noted that 2777# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2778# Time today." (The "two hour" remark referred to losing one hour of 2779# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2780# to DST - and one more hour on 1999-04-04 - when the announcers will have 2781# returned to Baltimore, which switches on that date.) 2782 2783# From Steffen Thorsen (2013-11-11): 2784# DST start in Cuba in 2004 ... does not follow the same rules as the 2785# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2786# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2787 2788# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2789# Cuba is not going back to standard time this year. 2790# From Paul Eggert (2006-03-22): 2791# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2792# says that it's due to a problem at the Antonio Guiteras 2793# thermoelectric plant, and says "This October there will be no return 2794# to normal hours (after daylight saving time)". 2795# For now, let's assume that it's a temporary measure. 2796 2797# From Carlos A. Carnero Delgado (2005-11-12): 2798# This year (just like in 2004-2005) there's no change in time zone 2799# adjustment in Cuba. We will stay in daylight saving time: 2800# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2801 2802# From Jesper Nørgaard Welen (2006-10-21): 2803# An article in GRANMA INTERNACIONAL claims that Cuba will end 2804# the 3 years of permanent DST next weekend, see 2805# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2806# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2807# watches should be set back one hour - going back to 00:00 hours - returning 2808# to the normal schedule.... 2809 2810# From Paul Eggert (2007-03-02): 2811# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2812# says Cuban clocks will advance at midnight on March 10. 2813# For lack of better information, assume Cuba will use US rules, 2814# except that it switches at midnight standard time as usual. 2815# 2816# From Steffen Thorsen (2007-10-25): 2817# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2818# earlier - on the last Sunday of October, just like in 2006. 2819# 2820# He supplied these references: 2821# 2822# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2823# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2824# 2825# From Alex Krivenyshev (2007-10-25): 2826# Here is also article from Granma (Cuba): 2827# 2828# Regirá el Horario Normal desde el próximo domingo 28 de octubre 2829# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2830# 2831# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2832 2833# From Arthur David Olson (2008-03-09): 2834# I'm in Maryland which is now observing United States Eastern Daylight 2835# Time. At 9:44 local time I used RealPlayer to listen to 2836# http://media.enet.cu/radioreloj 2837# a Cuban information station, and heard 2838# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2839# indicating that Cuba is still on standard time. 2840 2841# From Steffen Thorsen (2008-03-12): 2842# It seems that Cuba will start DST on Sunday, 2007-03-16... 2843# It was announced yesterday, according to this source (in Spanish): 2844# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2845# 2846# Some more background information is posted here: 2847# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2848# 2849# The article also says that Cuba has been observing DST since 1963, 2850# while Shanks (and tzdata) has 1965 as the first date (except in the 2851# 1940's). Many other web pages in Cuba also claim that it has been 2852# observed since 1963, but with the exception of 1970 - an exception 2853# which is not present in tzdata/Shanks. So there is a chance we need to 2854# change some historic records as well. 2855# 2856# One example: 2857# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2858 2859# From Jesper Nørgaard Welen (2008-03-13): 2860# The Cuban time change has just been confirmed on the most authoritative 2861# web site, the Granma. Please check out 2862# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2863# 2864# Basically as expected after Steffen Thorsen's information, the change 2865# will take place midnight between Saturday and Sunday. 2866 2867# From Arthur David Olson (2008-03-12): 2868# Assume Sun>=15 (third Sunday) going forward. 2869 2870# From Alexander Krivenyshev (2009-03-04) 2871# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2872# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2873# not on midnight March 14 / March 15 as previously thought. 2874# 2875# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2876# (in Spanish) 2877 2878# From Arthur David Olson (2009-03-09) 2879# I listened over the Internet to 2880# http://media.enet.cu/readioreloj 2881# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2882# the time was announced as "diez cinco" - the same time as here, indicating 2883# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2884 2885# From Steffen Thorsen (2011-03-08): 2886# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2887# this year. Nothing about the end date known so far (if that has 2888# changed at all). 2889# 2890# Source: 2891# http://granma.co.cu/2011/03/08/nacional/artic01.html 2892# 2893# Our info: 2894# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2895# 2896# From Steffen Thorsen (2011-10-30) 2897# Cuba will end DST two weeks later this year. Instead of going back 2898# tonight, it has been delayed to 2011-11-13 at 01:00. 2899# 2900# One source (Spanish) 2901# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2902# 2903# Our page: 2904# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2905# 2906# From Steffen Thorsen (2012-03-01) 2907# According to Radio Reloj, Cuba will start DST on Midnight between March 2908# 31 and April 1. 2909# 2910# Radio Reloj has the following info (Spanish): 2911# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2912# 2913# Our info on it: 2914# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2915 2916# From Steffen Thorsen (2012-11-03): 2917# Radio Reloj and many other sources report that Cuba is changing back 2918# to standard time on 2012-11-04: 2919# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2920# From Paul Eggert (2012-11-03): 2921# For now, assume the future rule is first Sunday in November. 2922 2923# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2924Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2925Rule Cuba 1928 only - Oct 10 0:00 0 S 2926Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2927Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2928Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2929Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2930Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2931Rule Cuba 1965 only - Sep 30 0:00 0 S 2932Rule Cuba 1966 only - May 29 0:00 1:00 D 2933Rule Cuba 1966 only - Oct 2 0:00 0 S 2934Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2935Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2936Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2937Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2938Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2939Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2940Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2941Rule Cuba 1978 only - May 7 0:00 1:00 D 2942Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2943Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2944Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2945Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2946Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2947Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2948Rule Cuba 1996 only - Oct 6 0:00s 0 S 2949Rule Cuba 1997 only - Oct 12 0:00s 0 S 2950Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2951Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2952Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2953Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2954Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2955Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2956Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2957Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2958Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2959Rule Cuba 2011 only - Nov 13 0:00s 0 S 2960Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2961Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2962Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2963 2964# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2965Zone America/Havana -5:29:28 - LMT 1890 2966 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2967 -5:00 Cuba C%sT 2968 2969# Dominica 2970# See America/Port_of_Spain. 2971 2972# Dominican Republic 2973 2974# From Steffen Thorsen (2000-10-30): 2975# Enrique Morales reported to me that the Dominican Republic has changed the 2976# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2977# http://www.listin.com.do/antes/261000/republica/princi.html 2978 2979# From Paul Eggert (2000-12-04): 2980# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2981 2982# From Rives McDow (2000-12-01): 2983# Dominican Republic changed its mind and presidential decree on Tuesday, 2984# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2985# Dominican Republic will be reverting to 8 hours from the International Date 2986# Line, and will not be using DST in the foreseeable future. The reason they 2987# decided to use DST was to be in synch with Puerto Rico, who was also going 2988# to implement DST. When Puerto Rico didn't implement DST, the president 2989# decided to revert. 2990 2991 2992# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2993Rule DR 1966 only - Oct 30 0:00 1:00 D 2994Rule DR 1967 only - Feb 28 0:00 0 S 2995Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2996Rule DR 1970 only - Feb 21 0:00 0 S 2997Rule DR 1971 only - Jan 20 0:00 0 S 2998Rule DR 1972 1974 - Jan 21 0:00 0 S 2999# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3000Zone America/Santo_Domingo -4:39:36 - LMT 1890 3001 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3002 -5:00 DR E%sT 1974 Oct 27 3003 -4:00 - AST 2000 Oct 29 2:00 3004 -5:00 US E%sT 2000 Dec 3 1:00 3005 -4:00 - AST 3006 3007# El Salvador 3008 3009# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3010Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 3011Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 3012# There are too many San Salvadors elsewhere, so use America/El_Salvador 3013# instead of America/San_Salvador. 3014# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3015Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 3016 -6:00 Salv C%sT 3017 3018# Grenada 3019# Guadeloupe 3020# St Barthélemy 3021# St Martin (French part) 3022# See America/Port_of_Spain. 3023 3024# Guatemala 3025# 3026# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3027# Diario Co Latino, at 3028# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3029# says in an article dated 2006-04-19 that the Guatemalan government had 3030# decided on that date to advance official time by 60 minutes, to lessen the 3031# impact of the elevated cost of oil.... Daylight saving time will last from 3032# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3033# From Paul Eggert (2006-06-22): 3034# The Ministry of Energy and Mines, press release CP-15/2006 3035# (2006-04-19), says DST ends at 24:00. See 3036# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3037 3038# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3039Rule Guat 1973 only - Nov 25 0:00 1:00 D 3040Rule Guat 1974 only - Feb 24 0:00 0 S 3041Rule Guat 1983 only - May 21 0:00 1:00 D 3042Rule Guat 1983 only - Sep 22 0:00 0 S 3043Rule Guat 1991 only - Mar 23 0:00 1:00 D 3044Rule Guat 1991 only - Sep 7 0:00 0 S 3045Rule Guat 2006 only - Apr 30 0:00 1:00 D 3046Rule Guat 2006 only - Oct 1 0:00 0 S 3047# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3048Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3049 -6:00 Guat C%sT 3050 3051# Haiti 3052# From Gwillim Law (2005-04-15): 3053# Risto O. Nykänen wrote me that Haiti is now on DST. 3054# I searched for confirmation, and I found a press release 3055# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3056# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3057# 3058# "The Prime Minister's Communication Office notifies the public in general 3059# and the press in particular that, following a decision of the Interior 3060# Ministry and the Territorial Collectivities [I suppose that means the 3061# provinces], Haiti will move to Eastern Daylight Time in the night from next 3062# Saturday the 2nd to Sunday the 3rd. 3063# 3064# "Consequently, the Prime Minister's Communication Office wishes to inform 3065# the population that the country's clocks will be set forward one hour 3066# starting at midnight. This provision will hold until the last Saturday in 3067# October 2005. 3068# 3069# "Port-au-Prince, March 31, 2005" 3070# 3071# From Steffen Thorsen (2006-04-04): 3072# I have been informed by users that Haiti observes DST this year like 3073# last year, so the current "only" rule for 2005 might be changed to a 3074# "max" rule or to last until 2006. (Who knows if they will observe DST 3075# next year or if they will extend their DST like US/Canada next year). 3076# 3077# I have found this article about it (in French): 3078# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3079# 3080# The reason seems to be an energy crisis. 3081 3082# From Stephen Colebourne (2007-02-22): 3083# Some IATA info: Haiti won't be having DST in 2007. 3084 3085# From Steffen Thorsen (2012-03-11): 3086# According to several news sources, Haiti will observe DST this year, 3087# apparently using the same start and end date as USA/Canada. 3088# So this means they have already changed their time. 3089# 3090# http://www.alterpresse.org/spip.php?article12510 3091# http://radiovision2000haiti.net/home/?p=13253 3092# 3093# From Arthur David Olson (2012-03-11): 3094# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3095# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3096# Assume a US-style fall back as well. 3097 3098# From Steffen Thorsen (2013-03-10): 3099# It appears that Haiti is observing DST this year as well, same rules 3100# as US/Canada. They did it last year as well, and it looks like they 3101# are going to observe DST every year now... 3102# 3103# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3104# http://www.canalplushaiti.net/?p=6714 3105 3106# From Steffen Thorsen (2016-03-12): 3107# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3108# are not going on DST this year. Several other resources confirm this: ... 3109# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3110# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3111# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3112 3113# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3114Rule Haiti 1983 only - May 8 0:00 1:00 D 3115Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3116Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3117# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3118# Go with IATA. 3119Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3120Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3121Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3122Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3123Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3124Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3125# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3126Zone America/Port-au-Prince -4:49:20 - LMT 1890 3127 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3128 -5:00 Haiti E%sT 3129 3130# Honduras 3131# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3132 3133# From Paul Eggert (2006-05-05): 3134# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3135# saying Honduras will start using DST midnight Saturday, effective 4 3136# months until September. La Tribuna reported today 3137# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3138# of Honduras, refused to back down on this. 3139 3140# From Jesper Nørgaard Welen (2006-08-08): 3141# It seems that Honduras has returned from DST to standard time this Monday at 3142# 00:00 hours (prolonging Sunday to 25 hours duration). 3143# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3144 3145# From Paul Eggert (2006-08-08): 3146# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3147# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3148# It mentions executive decree 18-2006. 3149 3150# From Steffen Thorsen (2006-08-17): 3151# Honduras will observe DST from 2007 to 2009, exact dates are not 3152# published, I have located this authoritative source: 3153# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3154 3155# From Steffen Thorsen (2007-03-30): 3156# http://www.laprensahn.com/pais_nota.php?id04962=7386 3157# So it seems that Honduras will not enter DST this year.... 3158 3159# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3160Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3161Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3162Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3163Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3164# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3165Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3166 -6:00 Hond C%sT 3167# 3168# Great Swan I ceded by US to Honduras in 1972 3169 3170# Jamaica 3171# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3172# unspecified official document, and says "This time is used throughout the 3173# island". Go with Milne. Round to the nearest second as required by zic. 3174# 3175# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3176# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3177# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3178# Manley's supporters associated this act with Manley's nickname "Joshua" 3179# (recall that in the Bible the sun stood still at Joshua's request), 3180# and with the Rod of Correction which Manley said he had received from 3181# Haile Selassie, Emperor of Ethiopia. See: 3182# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3183# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3184# 3185# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3186Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3187 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3188 -5:00 - EST 1974 3189 -5:00 US E%sT 1984 3190 -5:00 - EST 3191 3192# Martinique 3193# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3194Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3195 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3196 -4:00 - AST 1980 Apr 6 3197 -4:00 1:00 ADT 1980 Sep 28 3198 -4:00 - AST 3199 3200# Montserrat 3201# See America/Port_of_Spain. 3202 3203# Nicaragua 3204# 3205# This uses Shanks & Pottenger for times before 2005. 3206# 3207# From Steffen Thorsen (2005-04-12): 3208# I've got reports from 8 different people that Nicaragua just started 3209# DST on Sunday 2005-04-10, in order to save energy because of 3210# expensive petroleum. The exact end date for DST is not yet 3211# announced, only "September" but some sites also say "mid-September". 3212# Some background information is available on the President's official site: 3213# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3214# The Decree, no 23-2005 is available here: 3215# 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 3216# 3217# From Paul Eggert (2005-05-01): 3218# The decree doesn't say anything about daylight saving, but for now let's 3219# assume that it is daylight saving.... 3220# 3221# From Gwillim Law (2005-04-21): 3222# The Associated Press story on the time change, which can be found at 3223# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3224# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3225# time that a change of clocks was applied to save energy was in the year 2000 3226# during the Arnoldo Alemán administration."... 3227# The northamerica file says that Nicaragua has been on UTC-6 continuously 3228# since December 1998. I wasn't able to find any details of Nicaraguan time 3229# changes in 2000. Perhaps a note could be added to the northamerica file, to 3230# the effect that we have indirect evidence that DST was observed in 2000. 3231# 3232# From Jesper Nørgaard Welen (2005-11-02): 3233# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3234# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3235# (2005-09-26) 3236# 3237# From Jesper Nørgaard Welen (2006-05-05): 3238# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3239# (my informal translation) 3240# By order of the president of the republic, Enrique Bolaños, Nicaragua 3241# advanced by sixty minutes their official time, yesterday at 2 in the 3242# morning, and will stay that way until 30th of September. 3243# 3244# From Jesper Nørgaard Welen (2006-09-30): 3245# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3246# My informal translation runs: 3247# The natural sun time is restored in all the national territory, in that the 3248# time is returned one hour at 01:00 am of October 1 of 2006. 3249# 3250# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3251Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3252Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3253Rule Nic 2005 only - Apr 10 0:00 1:00 D 3254Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3255Rule Nic 2006 only - Apr 30 2:00 1:00 D 3256Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3257# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3258Zone America/Managua -5:45:08 - LMT 1890 3259 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3260 -6:00 - CST 1973 May 3261 -5:00 - EST 1975 Feb 16 3262 -6:00 Nic C%sT 1992 Jan 1 4:00 3263 -5:00 - EST 1992 Sep 24 3264 -6:00 - CST 1993 3265 -5:00 - EST 1997 3266 -6:00 Nic C%sT 3267 3268# Panama 3269# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3270Zone America/Panama -5:18:08 - LMT 1890 3271 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3272 -5:00 - EST 3273Link America/Panama America/Cayman 3274 3275# Puerto Rico 3276# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3277# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3278Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3279 -4:00 - AST 1942 May 3 3280 -4:00 US A%sT 1946 3281 -4:00 - AST 3282 3283# St Kitts-Nevis 3284# St Lucia 3285# See America/Port_of_Spain. 3286 3287# St Pierre and Miquelon 3288# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3289# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3290Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3291 -4:00 - AST 1980 May 3292 -3:00 - PMST 1987 # Pierre & Miquelon Time 3293 -3:00 Canada PM%sT 3294 3295# St Vincent and the Grenadines 3296# See America/Port_of_Spain. 3297 3298# Turks and Caicos 3299# 3300# From Chris Dunn in 3301# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3302# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3303# daylight saving dates for time changes have been adjusted to match 3304# the recent U.S. change of dates. 3305# 3306# From Brian Inglis (2007-04-28): 3307# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3308# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3309# rows before that there is an out of date entry for Oct: 3310# "Eastern Standard Times Begins 2007 3311# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3312# indicating that the normal ET rules are followed. 3313# 3314# From Paul Eggert (2014-08-19): 3315# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3316# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3317# Model this as a switch from EST/EDT to AST ... 3318# From Chris Walton (2014-11-04): 3319# ... the TCI government appears to have delayed the switch to 3320# "permanent daylight saving time" by one year.... 3321# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3322# 3323# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3324Zone America/Grand_Turk -4:44:32 - LMT 1890 3325 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3326 -5:00 - EST 1979 3327 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3328 -4:00 - AST 3329 3330# British Virgin Is 3331# Virgin Is 3332# See America/Port_of_Spain. 3333 3334 3335# Local Variables: 3336# coding: utf-8 3337# End: 3338