1# @(#)northamerica 8.17 2# <pre> 3 4# also includes Central America and the Caribbean 5 6# This data 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@elsie.nci.nih.gov for general use in the future). 9 10# From Paul Eggert (1999-03-22): 11# A reliable and entertaining source about time zones is 12# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 13 14############################################################################### 15 16# United States 17 18# From Paul Eggert (1999-03-31): 19# Howse writes (pp 121-125) that time zones were invented by 20# Professor Charles Ferdinand Dowd (1825-1904), 21# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 22# His pamphlet ``A System of National Time for Railroads'' (1870) 23# was the result of his proposals at the Convention of Railroad Trunk Lines 24# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 25# but in 1872-05 he moved the proposed origin to Greenwich. 26# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 27# and the most of the country soon followed suit. 28 29# From Paul Eggert (2005-04-16): 30# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 31# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 32 33# From Paul Eggert (2006-03-22): 34# A good source for time zone historical data in the US is 35# Thomas G. Shanks, The American Atlas (5th edition), 36# San Diego: ACS Publications, Inc. (1991). 37# Make sure you have the errata sheet; the book is somewhat useless without it. 38# It is the source for most of the pre-1991 US entries below. 39 40# From Paul Eggert (2001-03-06): 41# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 42# in his whimsical essay ``An Economical Project for Diminishing the Cost 43# of Light'' published in the Journal de Paris (1784-04-26). 44# Not everyone is happy with the results: 45# 46# I don't really care how time is reckoned so long as there is some 47# agreement about it, but I object to being told that I am saving 48# daylight when my reason tells me that I am doing nothing of the kind. 49# I even object to the implication that I am wasting something 50# valuable if I stay in bed after the sun has risen. As an admirer 51# of moonlight I resent the bossy insistence of those who want to 52# reduce my time for enjoying it. At the back of the Daylight Saving 53# scheme I detect the bony, blue-fingered hand of Puritanism, eager 54# to push people into bed earlier, and get them up earlier, to make 55# them healthy, wealthy and wise in spite of themselves. 56# 57# -- Robertson Davies, The diary of Samuel Marchbanks, 58# Clarke, Irwin (1947), XIX, Sunday 59# 60# For more about the first ten years of DST in the United States, see 61# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 62# Ten years of daylight saving from the Pittsburgh standpoint 63# (Carnegie Library of Pittsburgh, 1927)</a>. 64# 65# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 66# However, DST was imposed by the Standard Time Act of 1918, which 67# was the first nationwide legal time standard, and apparently 68# time was just called "Standard Time" or "Daylight Saving Time". 69 70# From Arthur David Olson: 71# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 72# See, for example, the front page of the Saturday, 1974-10-26 73# and Sunday, 1974-10-27 editions of the Washington Post. 74 75# From Arthur David Olson: 76# Before the Uniform Time Act of 1966 took effect in 1967, observance of 77# Daylight Saving Time in the US was by local option, except during wartime. 78 79# From Arthur David Olson (2000-09-25): 80# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 81# In the introduction, Oboler spoke of "Eastern Peace Time." 82# An AltaVista search turned up 83# <a href="http://rowayton.org/rhs/hstaug45.html">: 84# "When the time is announced over the radio now, it is 'Eastern Peace 85# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 86# </a> (August 1945) by way of confirmation. 87 88# From Joseph Gallant citing 89# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 90# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 91# to switch to London for Attlee's address, but the American people 92# never got to hear his speech live. According to one press account, 93# CBS' Bob Trout was first to announce the word of Japan's surrender, 94# but a few seconds later, NBC, ABC and Mutual also flashed the word 95# of surrender, all of whom interrupting the bells of Big Ben in 96# London which were to precede Mr. Attlee's speech. 97 98# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 99# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 100# 101# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 102# Any announcement from Asia would reach St. John's New York newsroom on a 103# wire service teletype machine, which had prescribed signals for major news. 104# Associated Press, for example, would ring five bells before spewing out 105# typed copy of an important story, and 10 bells for news "of transcendental 106# importance." 107# 108# On Aug. 14, stalling while talking steadily into the NBC networks' open 109# microphone, St. John heard five bells and waited only to hear a sixth bell, 110# before announcing confidently: "Ladies and gentlemen, World War II is over. 111# The Japanese have agreed to our surrender terms." 112# 113# He had scored a 20-second scoop on other broadcasters. 114 115# From Arthur David Olson (2005-08-22): 116# Paul has been careful to use the "US" rules only in those locations 117# that are part of the United States; this reflects the real scope of 118# U.S. government action. So even though the "US" rules have changed 119# in the latest release, other countries won't be affected. 120 121# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 122Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 123Rule US 1918 1919 - Oct lastSun 2:00 0 S 124Rule US 1942 only - Feb 9 2:00 1:00 W # War 125Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 126Rule US 1945 only - Sep 30 2:00 0 S 127Rule US 1967 2006 - Oct lastSun 2:00 0 S 128Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 129Rule US 1974 only - Jan 6 2:00 1:00 D 130Rule US 1975 only - Feb 23 2:00 1:00 D 131Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 132Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 133Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 134Rule US 2007 max - Nov Sun>=1 2:00 0 S 135 136# From Arthur David Olson, 2005-12-19 137# We generate the files specified below to guard against old files with 138# obsolete information being left in the time zone binary directory. 139# We limit the list to names that have appeared in previous versions of 140# this time zone package. 141# We do these as separate Zones rather than as Links to avoid problems if 142# a particular place changes whether it observes DST. 143# We put these specifications here in the northamerica file both to 144# increase the chances that they'll actually get compiled and to 145# avoid the need to duplicate the US rules in another file. 146 147# Zone NAME GMTOFF RULES FORMAT [UNTIL] 148Zone EST -5:00 - EST 149Zone MST -7:00 - MST 150Zone HST -10:00 - HST 151Zone EST5EDT -5:00 US E%sT 152Zone CST6CDT -6:00 US C%sT 153Zone MST7MDT -7:00 US M%sT 154Zone PST8PDT -8:00 US P%sT 155 156# From Bob Devine (1988-01-28): 157# ...Alaska (and Hawaii) had the timezone names changed in 1967. 158# old new 159# Pacific Standard Time(PST) -same- 160# Yukon Standard Time(YST) -same- 161# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 162# Nome Standard Time (NT) Bering Standard Time (BST) 163# 164# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 165# The YST zone now covers nearly all of the state, AHST just part 166# of the Aleutian islands. No DST. 167 168# From Paul Eggert (1995-12-19): 169# The tables below use `NST', not `NT', for Nome Standard Time. 170# I invented `CAWT' for Central Alaska War Time. 171 172# From U. S. Naval Observatory (1989-01-19): 173# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 174# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 175# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 176# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 177# USA MOUNTAIN 7 H BEHIND UTC DENVER 178# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 179# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 180# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 181# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 182# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 183# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 184# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 185# USA HAWAII 10 H BEHIND UTC 186# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 187 188# From Arthur David Olson (1989-01-21): 189# The above dates are for 1988. 190# Note the "AKST" and "AKDT" abbreviations, the claim that there's 191# no DST in Samoa, and the claim that there is DST in Alaska and the 192# Aleutians. 193 194# From Arthur David Olson (1988-02-13): 195# Legal standard time zone names, from United States Code (1982 Edition and 196# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 197# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 198# took effect), as explained in sections 263 and 261: 199# (none) 200# United States standard eastern time 201# United States standard mountain time 202# United States standard central time 203# United States standard Pacific time 204# (none) 205# United States standard Alaska time 206# (none) 207# Next, names from 1967-04-01 until 1983-11-30 (the date for 208# public law 98-181): 209# Atlantic standard time 210# eastern standard time 211# central standard time 212# mountain standard time 213# Pacific standard time 214# Yukon standard time 215# Alaska-Hawaii standard time 216# Bering standard time 217# And after 1983-11-30: 218# Atlantic standard time 219# eastern standard time 220# central standard time 221# mountain standard time 222# Pacific standard time 223# Alaska standard time 224# Hawaii-Aleutian standard time 225# Samoa standard time 226# The law doesn't give abbreviations. 227# 228# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 229# Public law 106-564 (2000-12-23) introduced the abbreviation 230# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 231# See the file "australasia". 232 233# From Arthur David Olson, 2005-08-09 234# The following was signed into law on 2005-08-08. 235# 236# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 237# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 238# U.S.C. 260a(a)) is amended-- 239# (1) by striking `first Sunday of April' and inserting `second 240# Sunday of March'; and 241# (2) by striking `last Sunday of October' and inserting `first 242# Sunday of November'. 243# (b) Effective Date- Subsection (a) shall take effect 1 year after the 244# date of enactment of this Act or March 1, 2007, whichever is later. 245# (c) Report to Congress- Not later than 9 months after the effective 246# date stated in subsection (b), the Secretary shall report to Congress 247# on the impact of this section on energy consumption in the United 248# States. 249# (d) Right to Revert- Congress retains the right to revert the 250# Daylight Saving Time back to the 2005 time schedules once the 251# Department study is complete. 252 253# US eastern time, represented by New York 254 255# Connecticut, Delaware, District of Columbia, most of Florida, 256# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 257# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 258# New Hampshire, New Jersey, New York, North Carolina, Ohio, 259# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 260# Vermont, Virginia, West Virginia 261 262# From Dave Cantor (2004-11-02): 263# Early this summer I had the occasion to visit the Mount Washington 264# Observatory weather station atop (of course!) Mount Washington [, NH].... 265# One of the staff members said that the station was on Eastern Standard Time 266# and didn't change their clocks for Daylight Saving ... so that their 267# reports will always have times which are 5 hours behind UTC. 268 269# From Paul Eggert (2005-08-26): 270# According to today's Huntsville Times 271# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 272# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 273# in Russell County, Lanett in Chambers County and some towns in Lee County, 274# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 275# Roberts, city administrator in Phenix City. as saying "We are in the Central 276# time zone, but we do go by the Eastern time zone because so many people work 277# in Columbus." 278 279# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 280Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 281Rule NYC 1920 only - Oct lastSun 2:00 0 S 282Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 283Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 284Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 285# Zone NAME GMTOFF RULES FORMAT [UNTIL] 286Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 287 -5:00 US E%sT 1920 288 -5:00 NYC E%sT 1942 289 -5:00 US E%sT 1946 290 -5:00 NYC E%sT 1967 291 -5:00 US E%sT 292 293# US central time, represented by Chicago 294 295# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 296# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 297# Washington counties), Illinois, western Indiana 298# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 299# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 300# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 301# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 302# western Tennessee, most of Texas, Wisconsin 303 304# From Larry M. Smith (2006-04-26) re Wisconsin: 305# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 306# is currently enforced at the 01:00 time of change. Because the local 307# "bar time" in the state corresponds to 02:00, a number of citations 308# are issued for the "sale of class 'B' alcohol after prohibited 309# hours" within the deviated hour of this change every year.... 310# 311# From Douglas R. Bomberg (2007-03-12): 312# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 313# Statue 175 closer in synch with the US Congress' intent.... 314# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 315 316# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 317Rule Chicago 1920 only - Jun 13 2:00 1:00 D 318Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 319Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 320Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 321Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 322Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 323# Zone NAME GMTOFF RULES FORMAT [UNTIL] 324Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 325 -6:00 US C%sT 1920 326 -6:00 Chicago C%sT 1936 Mar 1 2:00 327 -5:00 - EST 1936 Nov 15 2:00 328 -6:00 Chicago C%sT 1942 329 -6:00 US C%sT 1946 330 -6:00 Chicago C%sT 1967 331 -6:00 US C%sT 332# Oliver County, ND switched from mountain to central time on 1992-10-25. 333Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 334 -7:00 US M%sT 1992 Oct 25 02:00 335 -6:00 US C%sT 336# Morton County, ND, switched from mountain to central time on 337# 2003-10-26, except for the area around Mandan which was already central time. 338# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 339# Officially this switch also included part of Sioux County, and 340# Jones, Mellette, and Todd Counties in South Dakota; 341# but in practice these other counties were already observing central time. 342# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 343Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 344 -7:00 US M%sT 2003 Oct 26 02:00 345 -6:00 US C%sT 346 347# US mountain time, represented by Denver 348# 349# Colorado, far western Kansas, Montana, western 350# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 351# New Mexico, southwestern North Dakota, far eastern Oregon, 352# western South Dakota, far western Texas (El Paso County, Hudspeth County, 353# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 354# 355# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 356Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 357Rule Denver 1920 only - Oct lastSun 2:00 0 S 358Rule Denver 1921 only - May 22 2:00 0 S 359Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 360Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 361# Zone NAME GMTOFF RULES FORMAT [UNTIL] 362Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 363 -7:00 US M%sT 1920 364 -7:00 Denver M%sT 1942 365 -7:00 US M%sT 1946 366 -7:00 Denver M%sT 1967 367 -7:00 US M%sT 368 369# US Pacific time, represented by Los Angeles 370# 371# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 372# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties), 373# most of Nevada, most of Oregon, and Washington 374# 375# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 376Rule CA 1948 only - Mar 14 2:00 1:00 D 377Rule CA 1949 only - Jan 1 2:00 0 S 378Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 379Rule CA 1950 1961 - Sep lastSun 2:00 0 S 380Rule CA 1962 1966 - Oct lastSun 2:00 0 S 381# Zone NAME GMTOFF RULES FORMAT [UNTIL] 382Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 383 -8:00 US P%sT 1946 384 -8:00 CA P%sT 1967 385 -8:00 US P%sT 386 387# Alaska 388# AK%sT is the modern abbreviation for -9:00 per USNO. 389# 390# From Paul Eggert (2001-05-30): 391# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 392# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 393# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 394# also a Friday. Include only the time zone part of this transition, 395# ignoring the switch from Julian to Gregorian, since we can't represent 396# the Julian calendar. 397# 398# As far as we know, none of the exact locations mentioned below were 399# permanently inhabited in 1867 by anyone using either calendar. 400# (Yakutat was colonized by the Russians in 1799, but the settlement 401# was destroyed in 1805 by a Yakutat-kon war party.) However, there 402# were nearby inhabitants in some cases and for our purposes perhaps 403# it's best to simply use the official transition. 404# 405# Zone NAME GMTOFF RULES FORMAT [UNTIL] 406Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 407 -8:57:41 - LMT 1900 Aug 20 12:00 408 -8:00 - PST 1942 409 -8:00 US P%sT 1946 410 -8:00 - PST 1969 411 -8:00 US P%sT 1983 Oct 30 2:00 412 -9:00 US Y%sT 1983 Nov 30 413 -9:00 US AK%sT 414Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 415 -9:18:55 - LMT 1900 Aug 20 12:00 416 -9:00 - YST 1942 417 -9:00 US Y%sT 1946 418 -9:00 - YST 1969 419 -9:00 US Y%sT 1983 Nov 30 420 -9:00 US AK%sT 421Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 422 -9:59:36 - LMT 1900 Aug 20 12:00 423 -10:00 - CAT 1942 424 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 425 -10:00 US CAT/CAPT 1946 # Peace 426 -10:00 - CAT 1967 Apr 427 -10:00 - AHST 1969 428 -10:00 US AH%sT 1983 Oct 30 2:00 429 -9:00 US Y%sT 1983 Nov 30 430 -9:00 US AK%sT 431Zone America/Nome 12:58:21 - LMT 1867 Oct 18 432 -11:01:38 - LMT 1900 Aug 20 12:00 433 -11:00 - NST 1942 434 -11:00 US N%sT 1946 435 -11:00 - NST 1967 Apr 436 -11:00 - BST 1969 437 -11:00 US B%sT 1983 Oct 30 2:00 438 -9:00 US Y%sT 1983 Nov 30 439 -9:00 US AK%sT 440Zone America/Adak 12:13:21 - LMT 1867 Oct 18 441 -11:46:38 - LMT 1900 Aug 20 12:00 442 -11:00 - NST 1942 443 -11:00 US N%sT 1946 444 -11:00 - NST 1967 Apr 445 -11:00 - BST 1969 446 -11:00 US B%sT 1983 Oct 30 2:00 447 -10:00 US AH%sT 1983 Nov 30 448 -10:00 US HA%sT 449# The following switches don't quite make our 1970 cutoff. 450# 451# Shanks writes that part of southwest Alaska (e.g. Aniak) 452# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 453# and another part (e.g. Akiak) made the same switch five weeks later. 454# 455# From David Flater (2004-11-09): 456# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 457# Historic Preservation Commission, provided this information, which 458# suggests that Unalaska deviated from statutory time from early 1967 459# possibly until 1983: 460# 461# Minutes of the Unalaska City Council Meeting, January 10, 1967: 462# "Except for St. Paul and Akutan, Unalaska is the only important 463# location not on Alaska Standard Time. The following resolution was 464# made by William Robinson and seconded by Henry Swanson: Be it 465# resolved that the City of Unalaska hereby goes to Alaska Standard 466# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 467# January 14, Alaska Standard Time.) This resolution was passed with 468# three votes for and one against." 469 470# Hawaii 471# 472# From Arthur David Olson: 473# And then there's Hawaii. 474# DST was observed for one day in 1933; 475# standard time was changed by half an hour in 1947; 476# it's always standard as of 1986. 477# 478# From Paul Eggert: 479# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 480# 481Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 482 -10:30 - HST 1933 Apr 30 2:00 483 -10:30 1:00 HDT 1933 May 21 2:00 484 -10:30 US H%sT 1947 Jun 8 2:00 485 -10:00 - HST 486 487# Now we turn to US areas that have diverged from the consensus since 1970. 488 489# Arizona mostly uses MST. 490 491# From Paul Eggert (2002-10-20): 492# 493# The information in the rest of this paragraph is derived from the 494# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 495# Daylight Saving Time web page (2002-01-23)</a> maintained by the 496# Arizona State Library, Archives and Public Records. 497# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 498# time, but by federal law railroads, airlines, bus lines, military 499# personnel, and some engaged in interstate commerce continued to 500# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 501# Gazette says that was the date the law changed, and that 04-01 was 502# the date the state's clocks would change. In 1945 the State of 503# Arizona used standard time all year, again with exceptions only as 504# mandated by federal law. Arizona observed DST in 1967, but Arizona 505# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 506# 507# Shanks says the 1944 experiment came to an end on 1944-03-17. 508# Go with the Arizona State Library instead. 509 510Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 511 -7:00 US M%sT 1944 Jan 1 00:01 512 -7:00 - MST 1944 Apr 1 00:01 513 -7:00 US M%sT 1944 Oct 1 00:01 514 -7:00 - MST 1967 515 -7:00 US M%sT 1968 Mar 21 516 -7:00 - MST 517# From Arthur David Olson (1988-02-13): 518# A writer from the Inter Tribal Council of Arizona, Inc., 519# notes in private correspondence dated 1987-12-28 that "Presently, only the 520# Navajo Nation participates in the Daylight Saving Time policy, due to its 521# large size and location in three states." (The "only" means that other 522# tribal nations don't use DST.) 523 524Link America/Denver America/Shiprock 525 526# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 527# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 528# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 529# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 530# Teton, Twin Falls, Valley, Washington counties) and eastern Oregon 531# switched four weeks late in 1974. 532# 533# Zone NAME GMTOFF RULES FORMAT [UNTIL] 534Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 535 -8:00 US P%sT 1923 May 13 2:00 536 -7:00 US M%sT 1974 537 -7:00 - MST 1974 Feb 3 2:00 538 -7:00 US M%sT 539 540# Indiana 541# 542# For a map of Indiana's time zone regions, see: 543# <a href="http://www.mccsc.edu/time.html"> 544# What time is it in Indiana? 545# </a> (2006-03-01) 546# 547# From Paul Eggert (2006-03-22): 548# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 549# with the following exceptions: 550# 551# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 552# Vandenburgh, and Warrick counties have been like America/Chicago. 553# 554# - Dearborn and Ohio counties have been like America/New_York. 555# 556# - Clark, Floyd, and Harrison counties have been like 557# America/Kentucky/Louisville. 558# 559# - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties 560# have been like America/Indiana/Vincennes. 561# 562# - Crawford, Pike, Starke, and Switzerland counties have their own time zone 563# histories as noted below. 564# 565# Shanks partitioned Indiana into 345 regions, each with its own time history, 566# and wrote ``Even newspaper reports present contradictory information.'' 567# Those Hoosiers! Such a flighty and changeable people! 568# Fortunately, most of the complexity occurred before our cutoff date of 1970. 569# 570# Other than Indianapolis, the Indiana place names are so nondescript 571# that they would be ambiguous if we left them at the `America' level. 572# So we reluctantly put them all in a subdirectory `America/Indiana'. 573 574# From Paul Eggert (2005-08-16): 575# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 576 577# From Nathan Stratton Treadway (2006-03-30): 578# http://www.dot.gov/affairs/dot0406.htm [3705 B] 579# From Deborah Goldsmith (2006-01-18): 580# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 581# From Paul Eggert (2006-01-20): 582# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 583# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 584# Eastern Time Zone to the Central Time Zone.... The effective date of 585# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 586# changeover date from standard time to Daylight Saving Time." 587# Strictly speaking, this means the affected counties will change their 588# clocks twice that night, but this obviously is in error. The intent 589# is that 01:59:59 EST be followed by 02:00:00 CDT. 590 591# From Gwillim Law (2007-02-10): 592# The Associated Press has been reporting that Pulaski County, Indiana is 593# going to switch from Central to Eastern Time on March 11, 2007.... 594# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 595 596# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 597Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 598Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 599Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 600# Zone NAME GMTOFF RULES FORMAT [UNTIL] 601Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 602 -6:00 US C%sT 1920 603 -6:00 Indianapolis C%sT 1942 604 -6:00 US C%sT 1946 605 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 606 -5:00 - EST 1957 Sep 29 2:00 607 -6:00 - CST 1958 Apr 27 2:00 608 -5:00 - EST 1969 609 -5:00 US E%sT 1971 610 -5:00 - EST 2006 611 -5:00 US E%sT 612# 613# Eastern Crawford County, Indiana, left its clocks alone in 1974, 614# as well as from 1976 through 2005. 615# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 616Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 617Rule Marengo 1951 only - Sep lastSun 2:00 0 S 618Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 619Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 620# Zone NAME GMTOFF RULES FORMAT [UNTIL] 621Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 622 -6:00 US C%sT 1951 623 -6:00 Marengo C%sT 1961 Apr 30 2:00 624 -5:00 - EST 1969 625 -5:00 US E%sT 1974 Jan 6 2:00 626 -6:00 1:00 CDT 1974 Oct 27 2:00 627 -5:00 US E%sT 1976 628 -5:00 - EST 2006 629 -5:00 US E%sT 630# 631# Daviess, Dubois, Knox, Martin, and Perry Counties, Indiana, 632# switched from eastern to central time in April 2006. 633# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 634Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 635Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 636Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 637Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 638Rule Vincennes 1955 only - May 1 0:00 1:00 D 639Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 640Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 641Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 642Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 643# Zone NAME GMTOFF RULES FORMAT [UNTIL] 644Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 645 -6:00 US C%sT 1946 646 -6:00 Vincennes C%sT 1964 Apr 26 2:00 647 -5:00 - EST 1969 648 -5:00 US E%sT 1971 649 -5:00 - EST 2006 Apr 2 2:00 650 -6:00 US C%sT 651# 652# Pike County, Indiana moved from central to eastern time in 1977, 653# then switched back in 2006. 654# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 655Rule Pike 1955 only - May 1 0:00 1:00 D 656Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 657Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 658Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 659# Zone NAME GMTOFF RULES FORMAT [UNTIL] 660Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 661 -6:00 US C%sT 1955 662 -6:00 Pike C%sT 1965 Apr 25 2:00 663 -5:00 - EST 1966 Oct 30 2:00 664 -6:00 US C%sT 1977 Oct 30 2:00 665 -5:00 - EST 2006 Apr 2 2:00 666 -6:00 US C%sT 667# 668# Starke County, Indiana moved from central to eastern time in 1991, 669# then switched back in 2006. 670# From Arthur David Olson (1991-10-28): 671# An article on page A3 of the Sunday, 1991-10-27 Washington Post 672# notes that Starke County switched from Central time to Eastern time as of 673# 1991-10-27. 674# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 675Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 676Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 677Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 678Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 679Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 680# Zone NAME GMTOFF RULES FORMAT [UNTIL] 681Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 682 -6:00 US C%sT 1947 683 -6:00 Starke C%sT 1962 Apr 29 2:00 684 -5:00 - EST 1963 Oct 27 2:00 685 -6:00 US C%sT 1991 Oct 27 2:00 686 -5:00 - EST 2006 Apr 2 2:00 687 -6:00 US C%sT 688# 689# Pulaski County, Indiana, switched from eastern to central time in 690# April 2006 and then switched back in March 2007. 691# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 692Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 693Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 694Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 695Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 696# Zone NAME GMTOFF RULES FORMAT [UNTIL] 697Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 698 -6:00 US C%sT 1946 699 -6:00 Pulaski C%sT 1961 Apr 30 2:00 700 -5:00 - EST 1969 701 -5:00 US E%sT 1971 702 -5:00 - EST 2006 Apr 2 2:00 703 -6:00 US C%sT 2007 Mar 11 2:00 704 -5:00 US E%sT 705# 706# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 707# Zone NAME GMTOFF RULES FORMAT [UNTIL] 708Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 709 -6:00 US C%sT 1954 Apr 25 2:00 710 -5:00 - EST 1969 711 -5:00 US E%sT 1973 712 -5:00 - EST 2006 713 -5:00 US E%sT 714 715# Part of Kentucky left its clocks alone in 1974. 716# This also includes Clark, Floyd, and Harrison counties in Indiana. 717# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 718Rule Louisville 1921 only - May 1 2:00 1:00 D 719Rule Louisville 1921 only - Sep 1 2:00 0 S 720Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 721Rule Louisville 1941 only - Sep lastSun 2:00 0 S 722Rule Louisville 1946 only - Jun 2 2:00 0 S 723Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 724Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 725# Zone NAME GMTOFF RULES FORMAT [UNTIL] 726Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 727 -6:00 US C%sT 1921 728 -6:00 Louisville C%sT 1942 729 -6:00 US C%sT 1946 730 -6:00 Louisville C%sT 1961 Jul 23 2:00 731 -5:00 - EST 1968 732 -5:00 US E%sT 1974 Jan 6 2:00 733 -6:00 1:00 CDT 1974 Oct 27 2:00 734 -5:00 US E%sT 735# 736# Wayne County, Kentucky 737# 738# From 739# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 740# Lake Cumberland LIFE 741# </a> (1999-01-29) via WKYM-101.7: 742# Clinton County has joined Wayne County in asking the DoT to change from 743# the Central to the Eastern time zone.... The Wayne County government made 744# the same request in December. And while Russell County officials have not 745# taken action, the majority of respondents to a poll conducted there in 746# August indicated they would like to change to "fast time" also. 747# The three Lake Cumberland counties are the farthest east of any U.S. 748# location in the Central time zone. 749# 750# From Rich Wales (2000-08-29): 751# After prolonged debate, and despite continuing deep differences of opinion, 752# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 753# (-0500) time. They won't "fall back" this year. See Sara Shipley, 754# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 755# 756# From Paul Eggert (2001-07-16): 757# The final rule was published in the 758# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 759# Federal Register 65, 160 (2000-08-17), page 50154-50158. 760# </a> 761# 762Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 763 -6:00 US C%sT 1946 764 -6:00 - CST 1968 765 -6:00 US C%sT 2000 Oct 29 2:00 766 -5:00 US E%sT 767 768 769# From Rives McDow (2000-08-30): 770# Here ... are all the changes in the US since 1985. 771# Kearny County, KS (put all of county on central; 772# previously split between MST and CST) ... 1990-10 773# Starke County, IN (from CST to EST) ... 1991-10 774# Oliver County, ND (from MST to CST) ... 1992-10 775# West Wendover, NV (from PST TO MST) ... 1999-10 776# Wayne County, KY (from CST to EST) ... 2000-10 777# 778# From Paul Eggert (2001-07-17): 779# We don't know where the line used to be within Kearny County, KS, 780# so omit that change for now. 781# See America/Indiana/Knox for the Starke County, IN change. 782# See America/North_Dakota/Center for the Oliver County, ND change. 783# West Wendover, NV officially switched from Pacific to mountain time on 784# 1999-10-31. See the 785# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 786# Federal Register 64, 203 (1999-10-21), page 56705-56707. 787# </a> 788# However, the Federal Register says that West Wendover already operated 789# on mountain time, and the rule merely made this official; 790# hence a separate tz entry is not needed. 791 792# Michigan 793# 794# From Bob Devine (1988-01-28): 795# Michigan didn't observe DST from 1968 to 1973. 796# 797# From Paul Eggert (1999-03-31): 798# Shanks writes that Michigan started using standard time on 1885-09-18, 799# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 800# that Detroit kept 801# 802# local time until 1900 when the City Council decreed that clocks should 803# be put back twenty-eight minutes to Central Standard Time. Half the 804# city obeyed, half refused. After considerable debate, the decision 805# was rescinded and the city reverted to Sun time. A derisive offer to 806# erect a sundial in front of the city hall was referred to the 807# Committee on Sewers. Then, in 1905, Central time was adopted 808# by city vote. 809# 810# This story is too entertaining to be false, so go with Howse over Shanks. 811# 812# From Paul Eggert (2001-03-06): 813# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 814# one hour in 1914.'' This change is not in Shanks. We have no more 815# info, so omit this for now. 816# 817# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 818# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 819Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 820Rule Detroit 1948 only - Sep lastSun 2:00 0 S 821Rule Detroit 1967 only - Jun 14 2:00 1:00 D 822Rule Detroit 1967 only - Oct lastSun 2:00 0 S 823# Zone NAME GMTOFF RULES FORMAT [UNTIL] 824Zone America/Detroit -5:32:11 - LMT 1905 825 -6:00 - CST 1915 May 15 2:00 826 -5:00 - EST 1942 827 -5:00 US E%sT 1946 828 -5:00 Detroit E%sT 1973 829 -5:00 US E%sT 1975 830 -5:00 - EST 1975 Apr 27 2:00 831 -5:00 US E%sT 832# 833# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 834# switched from EST to CST/CDT in 1973. 835# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 836Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 837Rule Menominee 1946 only - Sep lastSun 2:00 0 S 838Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 839Rule Menominee 1966 only - Oct lastSun 2:00 0 S 840# Zone NAME GMTOFF RULES FORMAT [UNTIL] 841Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 842 -6:00 US C%sT 1946 843 -6:00 Menominee C%sT 1969 Apr 27 2:00 844 -5:00 - EST 1973 Apr 29 2:00 845 -6:00 US C%sT 846 847# Navassa 848# administered by the US Fish and Wildlife Service 849# claimed by US under the provisions of the 1856 Guano Islands Act 850# also claimed by Haiti 851# occupied 1857/1900 by the Navassa Phosphate Co 852# US lighthouse 1917/1996-09 853# currently uninhabited 854# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 855# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 856# Jimmy Skaggs, _The Great Guano Rush_ (1994). 857 858################################################################################ 859 860 861# From Paul Eggert (2006-03-22): 862# A good source for time zone historical data outside the U.S. is 863# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 864# San Diego: ACS Publications, Inc. (2003). 865# 866# Gwillim Law writes that a good source 867# for recent time zone data is the International Air Transport 868# Association's Standard Schedules Information Manual (IATA SSIM), 869# published semiannually. Law sent in several helpful summaries 870# of the IATA's data after 1990. 871# 872# Except where otherwise noted, Shanks & Pottenger is the source for 873# entries through 1990, and IATA SSIM is the source for entries afterwards. 874# 875# Other sources occasionally used include: 876# 877# Edward W. Whitman, World Time Differences, 878# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 879# which I found in the UCLA library. 880# 881# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 882# William Willett, The Waste of Daylight, 19th edition 883# </a> (1914-03) 884# 885# See the `europe' file for Greenland. 886 887# Canada 888 889# From Alain LaBont<e'> (1994-11-14): 890# I post here the time zone abbreviations standardized in Canada 891# for both English and French in the CAN/CSA-Z234.4-89 standard.... 892# 893# UTC Standard time Daylight savings time 894# offset French English French English 895# -2:30 - - HAT NDT 896# -3 - - HAA ADT 897# -3:30 HNT NST - - 898# -4 HNA AST HAE EDT 899# -5 HNE EST HAC CDT 900# -6 HNC CST HAR MDT 901# -7 HNR MST HAP PDT 902# -8 HNP PST HAY YDT 903# -9 HNY YST - - 904# 905# HN: Heure Normale ST: Standard Time 906# HA: Heure Avanc<e'>e DT: Daylight saving Time 907# 908# A: de l'Atlantique Atlantic 909# C: du Centre Central 910# E: de l'Est Eastern 911# M: Mountain 912# N: Newfoundland 913# P: du Pacifique Pacific 914# R: des Rocheuses 915# T: de Terre-Neuve 916# Y: du Yukon Yukon 917# 918# From Paul Eggert (1994-11-22): 919# Alas, this sort of thing must be handled by localization software. 920 921# Unless otherwise specified, the data for Canada are all from Shanks 922# & Pottenger. 923 924# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 925# 2007-03-01): 926# The British Columbia government announced yesterday that it will 927# adjust daylight savings next year to align with changes in the 928# U.S. and the rest of Canada.... 929# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 930# ... 931# Nova Scotia 932# Daylight saving time will be extended by four weeks starting in 2007.... 933# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 934# 935# [For New Brunswick] the new legislation dictates that the time change is to 936# be done at 02:00 instead of 00:01. 937# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 938# ... 939# Manitoba has traditionally changed the clock every fall at 03:00. 940# As of 2006, the transition is to take place one hour earlier at 02:00. 941# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 942# ... 943# [Alberta, Ontario, Quebec] will follow US rules. 944# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 945# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 946# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 947# ... 948# P.E.I. will follow US rules.... 949# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 950# ... 951# Province of Newfoundland and Labrador.... 952# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 953# ... 954# Yukon 955# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 956# ... 957# N.W.T. will follow US rules. Whoever maintains the government web site 958# does not seem to believe in bookmarks. To see the news release, click the 959# following link and search for "Daylight Savings Time Change". Press the 960# "Daylight Savings Time Change" link; it will fire off a popup using 961# JavaScript. 962# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 963# ... 964# Nunavut 965# An amendment to the Interpretation Act was registered on February 19/2007.... 966# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 967 968# From Paul Eggert (2006-04-25): 969# H. David Matthews and Mary Vincent's map 970# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 971# "It's about TIME", _Canadian Geographic_ (September-October 1998) 972# </a> contains detailed boundaries for regions observing nonstandard 973# time and daylight saving time arrangements in Canada circa 1998. 974# 975# INMS, the Institute for National Measurement Standards in Ottawa, has <a 976# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 977# information about standard and daylight saving time zones in Canada. 978# </a> (updated periodically). 979# Its unofficial information is often taken from Matthews and Vincent. 980 981# From Paul Eggert (2006-06-27): 982# For now, assume all of DST-observing Canada will fall into line with the 983# new US DST rules, 984 985# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 986Rule Canada 1918 only - Apr 14 2:00 1:00 D 987Rule Canada 1918 only - Oct 31 2:00 0 S 988Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 989Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 990Rule Canada 1945 only - Sep 30 2:00 0 S 991Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 992Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 993Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 994Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 995Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 996 997 998# Newfoundland and Labrador 999 1000# From Paul Eggert (2000-10-02): 1001# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1002# but the only part of Labrador that follows the rules is the 1003# southeast corner, including Port Hope Simpson and Mary's Harbour, 1004# but excluding, say, Black Tickle. 1005 1006# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1007Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1008Rule StJohns 1917 only - Sep 17 2:00 0 S 1009# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1010Rule StJohns 1919 only - May 5 23:00 1:00 D 1011Rule StJohns 1919 only - Aug 12 23:00 0 S 1012# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1013Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1014Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1015# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1016# Pottenger. 1017Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1018Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1019# Whitman gives the following transitions: 1020# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1021# but go with Shanks & Pottenger and assume they used Canadian rules. 1022# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1023# Apr 30 - Sep 24; go with Shanks & Pottenger. 1024Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1025Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1026Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1027Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1028Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1029# From Paul Eggert (2000-10-02): 1030# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1031# at 00:01 local time. For now, assume it started in 1987. 1032Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1033Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1034Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1035Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1036Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1037Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1038# 1039# St John's has an apostrophe, but Posix file names can't have apostrophes. 1040# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1041Zone America/St_Johns -3:30:52 - LMT 1884 1042 -3:30:52 StJohns N%sT 1918 1043 -3:30:52 Canada N%sT 1919 1044 -3:30:52 StJohns N%sT 1935 Mar 30 1045 -3:30 StJohns N%sT 1942 May 11 1046 -3:30 Canada N%sT 1946 1047 -3:30 StJohns N%sT 1048 1049# most of east Labrador 1050 1051# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 1052# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1053Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1054 -3:30:52 - NST 1918 1055 -3:30:52 Canada N%sT 1919 1056 -3:30:52 - NST 1935 Mar 30 1057 -3:30 - NST 1936 1058 -3:30 StJohns N%sT 1942 May 11 1059 -3:30 Canada N%sT 1946 1060 -3:30 StJohns N%sT 1966 Mar 15 2:00 1061 -4:00 StJohns A%sT 1062 1063 1064# west Labrador, Nova Scotia, Prince Edward I 1065 1066# From Paul Eggert (2006-03-22): 1067# Shanks & Pottenger write that since 1970 most of this region has been like 1068# Halifax. Many locales did not observe peacetime DST until 1972; 1069# Glace Bay, NS is the largest that we know of. 1070# Shanks & Pottenger also write that Liverpool, NS was the only town 1071# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1072# this is a typo. 1073 1074# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1075Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1076Rule Halifax 1916 only - Oct 1 0:00 0 S 1077Rule Halifax 1920 only - May 9 0:00 1:00 D 1078Rule Halifax 1920 only - Aug 29 0:00 0 S 1079Rule Halifax 1921 only - May 6 0:00 1:00 D 1080Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1081Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1082Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1083Rule Halifax 1923 only - Sep 4 0:00 0 S 1084Rule Halifax 1924 only - Sep 15 0:00 0 S 1085Rule Halifax 1925 only - Sep 28 0:00 0 S 1086Rule Halifax 1926 only - May 16 0:00 1:00 D 1087Rule Halifax 1926 only - Sep 13 0:00 0 S 1088Rule Halifax 1927 only - May 1 0:00 1:00 D 1089Rule Halifax 1927 only - Sep 26 0:00 0 S 1090Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1091Rule Halifax 1928 only - Sep 9 0:00 0 S 1092Rule Halifax 1929 only - Sep 3 0:00 0 S 1093Rule Halifax 1930 only - Sep 15 0:00 0 S 1094Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1095Rule Halifax 1932 only - May 1 0:00 1:00 D 1096Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1097Rule Halifax 1933 only - Oct 2 0:00 0 S 1098Rule Halifax 1934 only - May 20 0:00 1:00 D 1099Rule Halifax 1934 only - Sep 16 0:00 0 S 1100Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1101Rule Halifax 1935 only - Sep 30 0:00 0 S 1102Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1103Rule Halifax 1936 only - Sep 14 0:00 0 S 1104Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1105Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1106Rule Halifax 1939 only - May 28 0:00 1:00 D 1107Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1108Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1109Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1110Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1111Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1112Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1113Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1114Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1115Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1116# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1117Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1118 -4:00 Halifax A%sT 1918 1119 -4:00 Canada A%sT 1919 1120 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1121 -4:00 Canada A%sT 1946 1122 -4:00 Halifax A%sT 1974 1123 -4:00 Canada A%sT 1124Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1125 -4:00 Canada A%sT 1953 1126 -4:00 Halifax A%sT 1954 1127 -4:00 - AST 1972 1128 -4:00 Halifax A%sT 1974 1129 -4:00 Canada A%sT 1130 1131# New Brunswick 1132 1133# From Paul Eggert (2007-01-31): 1134# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1135# says they changed at 00:01 through 2006, and 1136# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1137# clear that this was the case since at least 1993. 1138# For now, assume it started in 1993. 1139 1140# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1141Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1142Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1143Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1144Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1145Rule Moncton 1939 only - May 27 1:00 1:00 D 1146Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1147Rule Moncton 1940 only - May 19 1:00 1:00 D 1148Rule Moncton 1941 only - May 4 1:00 1:00 D 1149Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1150Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1151Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1152Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1153Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1154# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1155Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1156 -5:00 - EST 1902 Jun 15 1157 -4:00 Canada A%sT 1933 1158 -4:00 Moncton A%sT 1942 1159 -4:00 Canada A%sT 1946 1160 -4:00 Moncton A%sT 1973 1161 -4:00 Canada A%sT 1993 1162 -4:00 Moncton A%sT 2007 1163 -4:00 Canada A%sT 1164 1165# Quebec 1166 1167# From Paul Eggert (2006-07-09): 1168# Shanks & Pottenger write that since 1970 most of Quebec has been 1169# like Montreal. 1170 1171# From Paul Eggert (2006-06-27): 1172# Matthews and Vincent (1998) also write that Quebec east of the -63 1173# meridian is supposed to observe AST, but residents as far east as 1174# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1175# In "Official time in Quebec" the Quebec department of justice writes in 1176# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1177# that "The residents of the Municipality of the 1178# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1179# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1180# written and use Atlantic standard time all year round. The same applies to 1181# the residents of the Native facilities along the lower North Shore." 1182# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1183# says this common practice was codified into law as of 2007. 1184# For lack of better info, guess this practice began around 1970, contra to 1185# Shanks & Pottenger who have this region observing AST/ADT. 1186 1187# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1188Rule Mont 1917 only - Mar 25 2:00 1:00 D 1189Rule Mont 1917 only - Apr 24 0:00 0 S 1190Rule Mont 1919 only - Mar 31 2:30 1:00 D 1191Rule Mont 1919 only - Oct 25 2:30 0 S 1192Rule Mont 1920 only - May 2 2:30 1:00 D 1193Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1194Rule Mont 1921 only - May 1 2:00 1:00 D 1195Rule Mont 1922 only - Apr 30 2:00 1:00 D 1196Rule Mont 1924 only - May 17 2:00 1:00 D 1197Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1198Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1199# The 1927-to-1937 rules can be expressed more simply as 1200# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1201# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1202# The rules below avoid use of 24:00 1203# (which pre-1998 versions of zic cannot handle). 1204Rule Mont 1927 only - May 1 0:00 1:00 D 1205Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1206Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1207Rule Mont 1932 only - May 1 0:00 1:00 D 1208Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1209Rule Mont 1933 only - Oct 1 0:00 0 S 1210Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1211Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1212Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1213Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1214Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1215Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1216 1217# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1218Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1219 -4:00 Canada A%sT 1970 1220 -4:00 - AST 1221Zone America/Montreal -4:54:16 - LMT 1884 1222 -5:00 Mont E%sT 1918 1223 -5:00 Canada E%sT 1919 1224 -5:00 Mont E%sT 1942 Feb 9 2:00s 1225 -5:00 Canada E%sT 1946 1226 -5:00 Mont E%sT 1974 1227 -5:00 Canada E%sT 1228 1229 1230# Ontario 1231 1232# From Paul Eggert (2006-07-09): 1233# Shanks & Pottenger write that since 1970 most of Ontario has been like 1234# Toronto. 1235# Thunder Bay skipped DST in 1973. 1236# Many smaller locales did not observe peacetime DST until 1974; 1237# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1238# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1239 1240# From Mark Brader (2003-07-26): 1241# [According to the Toronto Star] Orillia, Ontario, adopted DST 1242# effective Saturday, 1912-06-22, 22:00; the article mentions that 1243# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1244# have already done so. In Orillia DST was to run until Saturday, 1245# 1912-08-31 (no time mentioned), but it was met with considerable 1246# hostility from certain segments of the public, and was revoked after 1247# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1248# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1249# earlier in June). 1250# 1251# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1252 1253# From Paul Eggert (1997-10-17): 1254# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1255# says that Atikokan, Ontario currently does not observe DST, 1256# but will vote on 11-10 whether to use EST/EDT. 1257# He also writes that the 1258# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1259# Ontario Time Act (1990, Chapter T.9) 1260# </a> 1261# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1262# Officially Atikokan is therefore on CST/CDT, and most likely this report 1263# concerns a non-official time observed as a matter of local practice. 1264# 1265# From Paul Eggert (2000-10-02): 1266# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1267# New Osnaburgh observe CST all year, that Big Trout Lake observes 1268# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1269# violation of the official Ontario rules. 1270# 1271# From Paul Eggert (2006-07-09): 1272# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1273# 2005-07-21 Chronicle-Journal, which said: 1274# 1275# The clocks in Atikokan stay set on standard time year-round. 1276# This means they spend about half the time on central time and 1277# the other half on eastern time. 1278# 1279# For the most part, the system works, Mayor Dennis Brown said. 1280# 1281# "The majority of businesses in Atikokan deal more with Eastern 1282# Canada, but there are some that deal with Western Canada," he 1283# said. "I don't see any changes happening here." 1284# 1285# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1286# [New Osnaburgh] follow the same practice." 1287 1288# From Garry McKinnon (2006-07-14) via Chris Walton: 1289# I chatted with a member of my board who has an outstanding memory 1290# and a long history in Atikokan (and in the telecom industry) and he 1291# can say for certain that Atikokan has been practicing the current 1292# time keeping since 1952, at least. 1293 1294# From Paul Eggert (2006-07-17): 1295# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1296# ever since standard time was introduced, but the information from 1297# McKinnon sounds more authoritative. For now, assume that Atikokan 1298# switched to EST immediately after WWII era daylight saving time 1299# ended. This matches the old (less-populous) America/Coral_Harbour 1300# entry since our cutoff date of 1970, so we can move 1301# America/Coral_Harbour to the 'backward' file. 1302 1303# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1304Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1305Rule Toronto 1919 only - Oct 26 0:00 0 S 1306Rule Toronto 1920 only - May 2 2:00 1:00 D 1307Rule Toronto 1920 only - Sep 26 0:00 0 S 1308Rule Toronto 1921 only - May 15 2:00 1:00 D 1309Rule Toronto 1921 only - Sep 15 2:00 0 S 1310Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1311# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1312# was meant. 1313Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1314Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1315# The 1927-to-1939 rules can be expressed more simply as 1316# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1317# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1318# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1319# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1320# The rules below avoid use of Sun>=25 1321# (which pre-2004 versions of zic cannot handle). 1322Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1323Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1324Rule Toronto 1932 only - May 1 2:00 1:00 D 1325Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1326Rule Toronto 1933 only - Oct 1 2:00 0 S 1327Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1328Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1329Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1330Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1331Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1332Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1333Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1334Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1335Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1336# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1337# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1338# is wrong, and that he had confirmed it by checking the 1971-10-30 1339# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1340Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1341 1342# From Paul Eggert (2003-07-27): 1343# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1344# Port Arthur, Ontario, the principle of the Bill has been in 1345# operation for the past three years, and in the City of Moose Jaw, 1346# Saskatchewan, for one year." 1347 1348# From David Bryan via Tory Tronrud, Director/Curator, 1349# Thunder Bay Museum (2003-11-12): 1350# There is some suggestion, however, that, by-law or not, daylight 1351# savings time was being practiced in Fort William and Port Arthur 1352# before 1909.... [I]n 1910, the line between the Eastern and Central 1353# Time Zones was permanently moved about two hundred miles west to 1354# include the Thunder Bay area.... When Canada adopted daylight 1355# savings time in 1916, Fort William and Port Arthur, having done so 1356# already, did not change their clocks.... During the Second World 1357# War,... [t]he cities agreed to implement DST during the summer 1358# months for the remainder of the war years. 1359 1360# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1361Zone America/Toronto -5:17:32 - LMT 1895 1362 -5:00 Canada E%sT 1919 1363 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1364 -5:00 Canada E%sT 1946 1365 -5:00 Toronto E%sT 1974 1366 -5:00 Canada E%sT 1367Zone America/Thunder_Bay -5:57:00 - LMT 1895 1368 -6:00 - CST 1910 1369 -5:00 - EST 1942 1370 -5:00 Canada E%sT 1970 1371 -5:00 Mont E%sT 1973 1372 -5:00 - EST 1974 1373 -5:00 Canada E%sT 1374Zone America/Nipigon -5:53:04 - LMT 1895 1375 -5:00 Canada E%sT 1940 Sep 29 1376 -5:00 1:00 EDT 1942 Feb 9 2:00s 1377 -5:00 Canada E%sT 1378Zone America/Rainy_River -6:18:16 - LMT 1895 1379 -6:00 Canada C%sT 1940 Sep 29 1380 -6:00 1:00 CDT 1942 Feb 9 2:00s 1381 -6:00 Canada C%sT 1382Zone America/Atikokan -6:06:28 - LMT 1895 1383 -6:00 Canada C%sT 1940 Sep 29 1384 -6:00 1:00 CDT 1942 Feb 9 2:00s 1385 -6:00 Canada C%sT 1945 Sep 30 2:00 1386 -5:00 - EST 1387 1388 1389# Manitoba 1390 1391# From Rob Douglas (2006-04-06): 1392# the old Manitoba Time Act - as amended by Bill 2, assented to 1393# March 27, 1987 ... said ... 1394# "between two o'clock Central Standard Time in the morning of 1395# the first Sunday of April of each year and two o'clock Central 1396# Standard Time in the morning of the last Sunday of October next 1397# following, one hour in advance of Central Standard Time."... 1398# I believe that the English legislation [of the old time act] had = 1399# been assented to (March 22, 1967).... 1400# Also, as far as I can tell, there was no order-in-council varying 1401# the time of Daylight Saving Time for 2005 and so the provisions of 1402# the 1987 version would apply - the changeover was at 2:00 Central 1403# Standard Time (i.e. not until 3:00 Central Daylight Time). 1404 1405# From Paul Eggert (2006-04-10): 1406# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1407# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1408# it was also 02:00s in 1966. 1409 1410# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1411Rule Winn 1916 only - Apr 23 0:00 1:00 D 1412Rule Winn 1916 only - Sep 17 0:00 0 S 1413Rule Winn 1918 only - Apr 14 2:00 1:00 D 1414Rule Winn 1918 only - Oct 31 2:00 0 S 1415Rule Winn 1937 only - May 16 2:00 1:00 D 1416Rule Winn 1937 only - Sep 26 2:00 0 S 1417Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1418Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1419Rule Winn 1945 only - Sep lastSun 2:00 0 S 1420Rule Winn 1946 only - May 12 2:00 1:00 D 1421Rule Winn 1946 only - Oct 13 2:00 0 S 1422Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1423Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1424Rule Winn 1950 only - May 1 2:00 1:00 D 1425Rule Winn 1950 only - Sep 30 2:00 0 S 1426Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1427Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1428Rule Winn 1959 only - Oct lastSun 2:00 0 S 1429Rule Winn 1960 only - Sep lastSun 2:00 0 S 1430Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1431Rule Winn 1963 only - Sep 22 2:00 0 S 1432Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1433Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1434Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1435# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1436Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1437 -6:00 Winn C%sT 2006 1438 -6:00 Canada C%sT 1439 1440 1441# Saskatchewan 1442 1443# From Mark Brader (2003-07-26): 1444# The first actual adoption of DST in Canada was at the municipal 1445# level. As the [Toronto] Star put it (1912-06-07), "While people 1446# elsewhere have long been talking of legislation to save daylight, 1447# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1448# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1449# presumably late evening, as below), and would run until "the end of 1450# the summer". The discrepancy between municipal time and railroad 1451# time was noted. 1452 1453# From Paul Eggert (2003-07-27): 1454# Willett (1914-03) notes that DST "has been in operation ... in the 1455# City of Moose Jaw, Saskatchewan, for one year." 1456 1457# From Paul Eggert (2006-03-22): 1458# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1459# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1460# Other western towns (e.g. Lloydminster) are like Edmonton. 1461# Matthews and Vincent (1998) write that Denare Beach and Creighton 1462# are like Winnipeg, in violation of Saskatchewan law. 1463 1464# From W. Jones (1992-11-06): 1465# The. . .below is based on information I got from our law library, the 1466# provincial archives, and the provincial Community Services department. 1467# A precise history would require digging through newspaper archives, and 1468# since you didn't say what you wanted, I didn't bother. 1469# 1470# Saskatchewan is split by a time zone meridian (105W) and over the years 1471# the boundary became pretty ragged as communities near it reevaluated 1472# their affiliations in one direction or the other. In 1965 a provincial 1473# referendum favoured legislating common time practices. 1474# 1475# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1476# Saskatchewan 1978) was proclaimed, and established that the eastern 1477# part of Saskatchewan would use CST year round, that districts in 1478# northwest Saskatchewan would by default follow CST but could opt to 1479# follow Mountain Time rules (thus 1 hour difference in the winter and 1480# zero in the summer), and that districts in southwest Saskatchewan would 1481# by default follow MT but could opt to follow CST. 1482# 1483# It took a few years for the dust to settle (I know one story of a town 1484# on one time zone having its school in another, such that a mom had to 1485# serve her family lunch in two shifts), but presently it seems that only 1486# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1487# rules any more; all other districts appear to have used CST year round 1488# since sometime in the 1960s. 1489 1490# From Chris Walton (2006-06-26): 1491# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1492# long and rather painful to read. 1493# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1494 1495# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1496Rule Regina 1918 only - Apr 14 2:00 1:00 D 1497Rule Regina 1918 only - Oct 31 2:00 0 S 1498Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1499Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1500Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1501Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1502Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1503Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1504Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1505Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1506Rule Regina 1945 only - Sep lastSun 2:00 0 S 1507Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1508Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1509Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1510Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1511Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1512Rule Regina 1959 only - Oct lastSun 2:00 0 S 1513# 1514Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1515Rule Swift 1957 only - Oct lastSun 2:00 0 S 1516Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1517Rule Swift 1959 only - Oct lastSun 2:00 0 S 1518Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1519# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1520Zone America/Regina -6:58:36 - LMT 1905 Sep 1521 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1522 -6:00 - CST 1523Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1524 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1525 -7:00 Regina M%sT 1950 1526 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1527 -6:00 - CST 1528 1529 1530# Alberta 1531 1532# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1533Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1534Rule Edm 1918 only - Oct 31 2:00 0 S 1535Rule Edm 1919 only - May 27 2:00 0 S 1536Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1537Rule Edm 1920 only - Oct lastSun 2:00 0 S 1538Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1539Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1540Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1541Rule Edm 1945 only - Sep lastSun 2:00 0 S 1542Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1543Rule Edm 1947 only - Sep lastSun 2:00 0 S 1544Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1545Rule Edm 1967 only - Oct lastSun 2:00 0 S 1546Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1547Rule Edm 1969 only - Oct lastSun 2:00 0 S 1548Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1549Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1550# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1551Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1552 -7:00 Edm M%sT 1987 1553 -7:00 Canada M%sT 1554 1555 1556# British Columbia 1557 1558# From Paul Eggert (2006-03-22): 1559# Shanks & Pottenger write that since 1970 most of this region has 1560# been like Vancouver. 1561# Dawson Creek uses MST. Much of east BC is like Edmonton. 1562# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1563 1564# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1565Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1566Rule Vanc 1918 only - Oct 31 2:00 0 S 1567Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1568Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1569Rule Vanc 1945 only - Sep 30 2:00 0 S 1570Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1571Rule Vanc 1946 only - Oct 13 2:00 0 S 1572Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1573Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1574# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1575Zone America/Vancouver -8:12:28 - LMT 1884 1576 -8:00 Vanc P%sT 1987 1577 -8:00 Canada P%sT 1578Zone America/Dawson_Creek -8:00:56 - LMT 1884 1579 -8:00 Canada P%sT 1947 1580 -8:00 Vanc P%sT 1972 Aug 30 2:00 1581 -7:00 - MST 1582 1583 1584# Northwest Territories, Nunavut, Yukon 1585 1586# From Paul Eggert (2006-03-22): 1587# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1588# Mathew Englander (1996-10-07) gives the following refs: 1589# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1590# c. 7 defines Yukon standard time as UTC-9. This is still valid; 1591# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1592# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1593# * O.I.C. 1980/02 established DST. 1594# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1595# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1596# with Englander. 1597# From Chris Walton (2006-06-26): 1598# Here is a link to the old daylight saving portion of the interpretation 1599# act which was last updated in 1987: 1600# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1601 1602# From Rives McDow (1999-09-04): 1603# Nunavut ... moved ... to incorporate the whole territory into one time zone. 1604# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1605# Nunavut moves to single time zone Oct. 31 1606# </a> 1607# 1608# From Antoine Leca (1999-09-06): 1609# We then need to create a new timezone for the Kitikmeot region of Nunavut 1610# to differentiate it from the Yellowknife region. 1611 1612# From Paul Eggert (1999-09-20): 1613# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1614# Basic Facts: The New Territory 1615# </a> (1999) reports that Pangnirtung operates on eastern time, 1616# and that Coral Harbour does not observe DST. We don't know when 1617# Pangnirtung switched to eastern time; we'll guess 1995. 1618 1619# From Rives McDow (1999-11-08): 1620# On October 31, when the rest of Nunavut went to Central time, 1621# Pangnirtung wobbled. Here is the result of their wobble: 1622# 1623# The following businesses and organizations in Pangnirtung use Central Time: 1624# 1625# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1626# Eastern Arctic National Parks, A & D Specialist 1627# 1628# The following businesses and organizations in Pangnirtung use Eastern Time: 1629# 1630# Hamlet office, All other businesses, Both schools, Airport operator 1631# 1632# This has made for an interesting situation there, which warranted the news. 1633# No one there that I spoke with seems concerned, or has plans to 1634# change the local methods of keeping time, as it evidently does not 1635# really interfere with any activities or make things difficult locally. 1636# They plan to celebrate New Year's turn-over twice, one hour apart, 1637# so it appears that the situation will last at least that long. 1638# The Nunavut Intergovernmental Affairs hopes that they will "come to 1639# their senses", but the locals evidently don't see any problem with 1640# the current state of affairs. 1641 1642# From Michaela Rodrigue, writing in the 1643# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1644# Nunatsiaq News (1999-11-19)</a>: 1645# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1646# central - or Nunavut time - for government offices, and eastern time 1647# for municipal offices and schools.... Igloolik [was similar but then] 1648# made the switch to central time on Saturday, Nov. 6. 1649 1650# From Paul Eggert (2000-10-02): 1651# Matthews and Vincent (1998) say the following, but we lack histories 1652# for these potential new Zones. 1653# 1654# The Canadian Forces station at Alert uses Eastern Time while the 1655# handful of residents at the Eureka weather station [in the Central 1656# zone] skip daylight savings. Baffin Island, which is crossed by the 1657# Central, Eastern and Atlantic Time zones only uses Eastern Time. 1658# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1659# Central Time and Southampton Island [in the Central zone] is not 1660# required to use daylight savings. 1661 1662# From 1663# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 1664# Nunavut now has two time zones 1665# </a> (2000-11-10): 1666# The Nunavut government would allow its employees in Kugluktuk and 1667# Cambridge Bay to operate on central time year-round, putting them 1668# one hour behind the rest of Nunavut for six months during the winter. 1669# At the end of October the two communities had rebelled against 1670# Nunavut's unified time zone, refusing to shift to eastern time with 1671# the rest of the territory for the winter. Cambridge Bay remained on 1672# central time, while Kugluktuk, even farther west, reverted to 1673# mountain time, which they had used before the advent of Nunavut's 1674# unified time zone in 1999. 1675# 1676# From Rives McDow (2001-01-20), quoting the Nunavut government: 1677# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1678 1679# From Paul Eggert (2000-12-04): 1680# Let's just keep track of the official times for now. 1681 1682# From Rives McDow (2001-03-07): 1683# The premier of Nunavut has issued a ministerial statement advising 1684# that effective 2001-04-01, the territory of Nunavut will revert 1685# back to three time zones (mountain, central, and eastern). Of the 1686# cities in Nunavut, Coral Harbor is the only one that I know of that 1687# has said it will not observe dst, staying on EST year round. I'm 1688# checking for more info, and will get back to you if I come up with 1689# more. 1690# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 1691 1692# From Gwillim Law (2005-05-21): 1693# According to maps at 1694# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1695# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1696# (both dated 2003), and 1697# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1698# (from a 1998 Canadian Geographic article), the de facto and de jure time 1699# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1700# round. Using Google, it's easy to find other websites that confirm this. 1701# I wasn't able to find how far back this time regimen goes, but since it 1702# predates the creation of Nunavut, it probably goes back many years.... 1703# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1704# 1705# From Paul Eggert (2005-07-26): 1706# For lack of better information, assume that Southampton Island observed 1707# daylight saving only during wartime. 1708 1709# From Chris Walton (2007-03-01): 1710# ... the community of Resolute (located on Cornwallis Island in 1711# Nunavut) moved from Central Time to Eastern Time last November. 1712# Basically the community did not change its clocks at the end of 1713# daylight saving.... 1714# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1715 1716# From Chris Walton (2007-03-14): 1717# Today I phoned the "hamlet office" to find out what Resolute was doing with 1718# its clocks. 1719# 1720# The individual that answered the phone confirmed that the clocks did not 1721# move at the end of daylight saving on October 29/2006. He also told me that 1722# the clocks did not move this past weekend (March 11/2007).... 1723# 1724# America/Resolute should use the "Canada" Rule up to October 29/2006. 1725# After that it should be fixed on Eastern Standard Time until further notice. 1726 1727# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1728Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 1729Rule NT_YK 1918 only - Oct 27 2:00 0 S 1730Rule NT_YK 1919 only - May 25 2:00 1:00 D 1731Rule NT_YK 1919 only - Nov 1 0:00 0 S 1732Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1733Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 1734Rule NT_YK 1945 only - Sep 30 2:00 0 S 1735Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 1736Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 1737Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1738Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1739Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 1740# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1741# aka Panniqtuuq 1742Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 1743 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 1744 -5:00 Canada E%sT 1999 Oct 31 2:00 1745 -6:00 Canada C%sT 2000 Oct 29 2:00 1746 -5:00 Canada E%sT 1747# formerly Frobisher Bay 1748Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 1749 -5:00 NT_YK E%sT 1999 Oct 31 2:00 1750 -6:00 Canada C%sT 2000 Oct 29 2:00 1751 -5:00 Canada E%sT 1752# aka Qausuittuq 1753Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 1754 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1755 -5:00 - EST 2001 Apr 1 3:00 1756 -6:00 Canada C%sT 2006 Oct 29 2:00 1757 -5:00 - EST 1758# aka Kangiqiniq 1759Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1760 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1761 -5:00 - EST 2001 Apr 1 3:00 1762 -6:00 Canada C%sT 1763# aka Iqaluktuuttiaq 1764Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 1765 -7:00 NT_YK M%sT 1999 Oct 31 2:00 1766 -6:00 Canada C%sT 2000 Oct 29 2:00 1767 -5:00 - EST 2000 Nov 5 0:00 1768 -6:00 - CST 2001 Apr 1 3:00 1769 -7:00 Canada M%sT 1770Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1771 -7:00 NT_YK M%sT 1980 1772 -7:00 Canada M%sT 1773Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 1774 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1775 -7:00 NT_YK M%sT 1980 1776 -7:00 Canada M%sT 1777Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 1778 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1779 -8:00 NT_YK P%sT 1980 1780 -8:00 Canada P%sT 1781Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 1782 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1783 -8:00 NT_YK P%sT 1980 1784 -8:00 Canada P%sT 1785 1786 1787############################################################################### 1788 1789# Mexico 1790 1791# From Paul Eggert (2001-03-05): 1792# The Investigation and Analysis Service of the 1793# Mexican Library of Congress (MLoC) has published a 1794# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 1795# history of Mexican local time (in Spanish) 1796# </a>. 1797# 1798# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 1799# (In all cases we go with the MLoC.) 1800# S&P report that Baja was at -8:00 in 1922/1923. 1801# S&P say the 1930 transition in Baja was 1930-11-16. 1802# S&P report no DST during summer 1931. 1803# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 1804 1805# From Gwillim Law (2001-02-20): 1806# There are some other discrepancies between the Decrees page and the 1807# tz database. I think they can best be explained by supposing that 1808# the researchers who prepared the Decrees page failed to find some of 1809# the relevant documents. 1810 1811# From Alan Perry (1996-02-15): 1812# A guy from our Mexico subsidiary finally found the Presidential Decree 1813# outlining the timezone changes in Mexico. 1814# 1815# ------------- Begin Forwarded Message ------------- 1816# 1817# I finally got my hands on the Official Presidential Decree that sets up the 1818# rules for the DST changes. The rules are: 1819# 1820# 1. The country is divided in 3 timezones: 1821# - Baja California Norte (the Mexico/BajaNorte TZ) 1822# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 1823# - The rest of the country (the Mexico/General TZ) 1824# 1825# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 1826# at 2:00 AM, the times in each zone are as follows: 1827# BajaNorte: GMT+7 1828# BajaSur: GMT+6 1829# General: GMT+5 1830# 1831# 3. The rest of the year, the times are as follows: 1832# BajaNorte: GMT+8 1833# BajaSur: GMT+7 1834# General: GMT+6 1835# 1836# The Decree was published in Mexico's Official Newspaper on January 4th. 1837# 1838# -------------- End Forwarded Message -------------- 1839# From Paul Eggert (1996-06-12): 1840# For an English translation of the decree, see 1841# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 1842# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 1843# </a> 1844 1845# From Rives McDow (1998-10-08): 1846# The State of Quintana Roo has reverted back to central STD and DST times 1847# (i.e. UTC -0600 and -0500 as of 1998-08-02). 1848 1849# From Rives McDow (2000-01-10): 1850# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 1851# zone 5 hours from the International Date Line, and will not observe daylight 1852# savings time so as to stay on the same time zone as the southern part of 1853# Arizona year round. 1854 1855# From Jesper Norgaard, translating 1856# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 1857# In Oaxaca, the 55.000 teachers from the Section 22 of the National 1858# Syndicate of Education Workers, refuse to apply daylight saving each 1859# year, so that the more than 10,000 schools work at normal hour the 1860# whole year. 1861 1862# From Gwillim Law (2001-01-19): 1863# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 1864# (translated):... 1865# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 1866# that Summer Time will be reduced from seven to five months, starting 1867# this year.... 1868# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 1869# [translated], says "summer time will ... take effect on the first Sunday 1870# in May, and end on the last Sunday of September. 1871 1872# From Arthur David Olson (2001-01-25): 1873# The 2001-01-24 traditional Washington Post contained the page one 1874# story "Timely Issue Divides Mexicans."... 1875# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 1876# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 1877# Mexico City and its 20 million residents on a different time than 1878# the rest of the country..." In particular, Lopez Obrador would abolish 1879# observation of Daylight Saving Time. 1880 1881# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 1882# Official statute published by the Energy Department 1883# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 1884# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 1885 1886# From Paul Eggert (2001-03-03): 1887# 1888# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 1889# James F. Smith writes in today's LA Times 1890# </a> 1891# * Sonora will continue to observe standard time. 1892# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 1893# the Federal District will not adopt DST. 1894# * 4 of 16 district leaders announced they'll ignore the decree. 1895# * The decree does not affect federal-controlled facilities including 1896# the airport, banks, hospitals, and schools. 1897# 1898# For now we'll assume that the Federal District will bow to federal rules. 1899 1900# From Jesper Norgaard (2001-04-01): 1901# I found some references to the Mexican application of daylight 1902# saving, which modifies what I had already sent you, stating earlier 1903# that a number of northern Mexican states would go on daylight 1904# saving. The modification reverts this to only cover Baja California 1905# (Norte), while all other states (except Sonora, who has no daylight 1906# saving all year) will follow the original decree of president 1907# Vicente Fox, starting daylight saving May 6, 2001 and ending 1908# September 30, 2001. 1909# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 1910# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 1911 1912# From Reuters (2001-09-04): 1913# Mexico's Supreme Court on Tuesday declared that daylight savings was 1914# unconstitutional in Mexico City, creating the possibility the 1915# capital will be in a different time zone from the rest of the nation 1916# next year.... The Supreme Court's ruling takes effect at 2:00 1917# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 1918# standard time. "This is so residents of the Federal District are not 1919# subject to unexpected time changes," a statement from the court said. 1920 1921# From Jesper Norgaard Welen (2002-03-12): 1922# ... consulting my local grocery store(!) and my coworkers, they all insisted 1923# that a new decision had been made to reinstate US style DST in Mexico.... 1924# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 1925# confirms this. Sonora as usual is the only state where DST is not applied. 1926 1927# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1928Rule Mexico 1939 only - Feb 5 0:00 1:00 D 1929Rule Mexico 1939 only - Jun 25 0:00 0 S 1930Rule Mexico 1940 only - Dec 9 0:00 1:00 D 1931Rule Mexico 1941 only - Apr 1 0:00 0 S 1932Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 1933Rule Mexico 1944 only - May 1 0:00 0 S 1934Rule Mexico 1950 only - Feb 12 0:00 1:00 D 1935Rule Mexico 1950 only - Jul 30 0:00 0 S 1936Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 1937Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 1938Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 1939Rule Mexico 2001 only - Sep lastSun 2:00 0 S 1940Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 1941Rule Mexico 2002 max - Oct lastSun 2:00 0 S 1942# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1943# Quintana Roo 1944Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 1945 -6:00 - CST 1981 Dec 23 1946 -5:00 Mexico E%sT 1998 Aug 2 2:00 1947 -6:00 Mexico C%sT 1948# Campeche, Yucatan 1949Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 1950 -6:00 - CST 1981 Dec 23 1951 -5:00 - EST 1982 Dec 2 1952 -6:00 Mexico C%sT 1953# Coahuila, Durango, Nuevo Leon, Tamaulipas 1954Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 1955 -6:00 - CST 1988 1956 -6:00 US C%sT 1989 1957 -6:00 Mexico C%sT 1958# Central Mexico 1959Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 1960 -7:00 - MST 1927 Jun 10 23:00 1961 -6:00 - CST 1930 Nov 15 1962 -7:00 - MST 1931 May 1 23:00 1963 -6:00 - CST 1931 Oct 1964 -7:00 - MST 1932 Apr 1 1965 -6:00 Mexico C%sT 2001 Sep 30 02:00 1966 -6:00 - CST 2002 Feb 20 1967 -6:00 Mexico C%sT 1968# Chihuahua 1969Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 1970 -7:00 - MST 1927 Jun 10 23:00 1971 -6:00 - CST 1930 Nov 15 1972 -7:00 - MST 1931 May 1 23:00 1973 -6:00 - CST 1931 Oct 1974 -7:00 - MST 1932 Apr 1 1975 -6:00 - CST 1996 1976 -6:00 Mexico C%sT 1998 1977 -6:00 - CST 1998 Apr Sun>=1 3:00 1978 -7:00 Mexico M%sT 1979# Sonora 1980Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 1981 -7:00 - MST 1927 Jun 10 23:00 1982 -6:00 - CST 1930 Nov 15 1983 -7:00 - MST 1931 May 1 23:00 1984 -6:00 - CST 1931 Oct 1985 -7:00 - MST 1932 Apr 1 1986 -6:00 - CST 1942 Apr 24 1987 -7:00 - MST 1949 Jan 14 1988 -8:00 - PST 1970 1989 -7:00 Mexico M%sT 1999 1990 -7:00 - MST 1991# Baja California Sur, Nayarit, Sinaloa 1992Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 1993 -7:00 - MST 1927 Jun 10 23:00 1994 -6:00 - CST 1930 Nov 15 1995 -7:00 - MST 1931 May 1 23:00 1996 -6:00 - CST 1931 Oct 1997 -7:00 - MST 1932 Apr 1 1998 -6:00 - CST 1942 Apr 24 1999 -7:00 - MST 1949 Jan 14 2000 -8:00 - PST 1970 2001 -7:00 Mexico M%sT 2002# Baja California 2003Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2004 -7:00 - MST 1924 2005 -8:00 - PST 1927 Jun 10 23:00 2006 -7:00 - MST 1930 Nov 15 2007 -8:00 - PST 1931 Apr 1 2008 -8:00 1:00 PDT 1931 Sep 30 2009 -8:00 - PST 1942 Apr 24 2010 -8:00 1:00 PWT 1945 Aug 14 23:00u 2011 -8:00 1:00 PPT 1945 Nov 12 # Peace 2012 -8:00 - PST 1948 Apr 5 2013 -8:00 1:00 PDT 1949 Jan 14 2014 -8:00 - PST 1954 2015 -8:00 CA P%sT 1961 2016 -8:00 - PST 1976 2017 -8:00 US P%sT 1996 2018 -8:00 Mexico P%sT 2001 2019 -8:00 US P%sT 2002 Feb 20 2020 -8:00 Mexico P%sT 2021# From Paul Eggert (2006-03-22): 2022# Formerly there was an America/Ensenada zone, which differed from 2023# America/Tijuana only in that it did not observe DST from 1976 2024# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2025# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2026# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2027# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2028# DST-observance was a town-by-town matter back then. This concerns 2029# data after 1970 so most likely there should be at least one Zone 2030# other than America/Tijuana for Baja, but it's not clear yet what its 2031# name or contents should be. 2032# 2033# Revillagigedo Is 2034# no information 2035 2036############################################################################### 2037 2038# Anguilla 2039# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2040Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 2041 -4:00 - AST 2042 2043# Antigua and Barbuda 2044# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2045Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2046 -5:00 - EST 1951 2047 -4:00 - AST 2048 2049# Bahamas 2050# 2051# From Sue Williams (2006-12-07): 2052# The Bahamas announced about a month ago that they plan to change their DST 2053# rules to sync with the U.S. starting in 2007.... 2054# http://www.jonesbahamas.com/?c=45&a=10412 2055 2056# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2057Rule Bahamas 1964 2006 - Oct lastSun 2:00 0 S 2058Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 2059# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2060Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 2061 -5:00 Bahamas E%sT 1976 2062 -5:00 US E%sT 2063 2064# Barbados 2065# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2066Rule Barb 1977 only - Jun 12 2:00 1:00 D 2067Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2068Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2069Rule Barb 1979 only - Sep 30 2:00 0 S 2070Rule Barb 1980 only - Sep 25 2:00 0 S 2071# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2072Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 2073 -3:58:28 - BMT 1932 # Bridgetown Mean Time 2074 -4:00 Barb A%sT 2075 2076# Belize 2077# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2078# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2079Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2080Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2081Rule Belize 1973 only - Dec 5 0:00 1:00 D 2082Rule Belize 1974 only - Feb 9 0:00 0 S 2083Rule Belize 1982 only - Dec 18 0:00 1:00 D 2084Rule Belize 1983 only - Feb 12 0:00 0 S 2085# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2086Zone America/Belize -5:52:48 - LMT 1912 Apr 2087 -6:00 Belize C%sT 2088 2089# Bermuda 2090 2091# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2092 2093# Next year, however, clocks in the US will go forward on the second Sunday 2094# in March, until the first Sunday in November. And, after the Time Zone 2095# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2096# Friday, the same thing will happen in Bermuda. 2097# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2098 2099# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2100Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 2101 -4:00 - AST 1974 Apr 28 2:00 2102 -4:00 Bahamas A%sT 1976 2103 -4:00 US A%sT 2104 2105# Cayman Is 2106# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2107Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2108 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2109 -5:00 - EST 2110 2111# Costa Rica 2112# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2113Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2114Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2115Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2116# IATA SSIM (1991-09) says the following was at 1:00; 2117# go with Shanks & Pottenger. 2118Rule CR 1991 only - Jul 1 0:00 0 S 2119Rule CR 1992 only - Mar 15 0:00 0 S 2120# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 2121# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2122Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 2123 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 2124 -6:00 CR C%sT 2125# Coco 2126# no information; probably like America/Costa_Rica 2127 2128# Cuba 2129 2130# From Arthur David Olson (1999-03-29): 2131# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2132# the Cuban National Team and the Baltimore Orioles was carried live on 2133# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2134# During the game, play-by-play announcer Jim Hunter noted that 2135# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2136# Time today." (The "two hour" remark referred to losing one hour of 2137# sleep on 1999-03-28--when the announcers were in Cuba as it switched 2138# to DST--and one more hour on 1999-04-04--when the announcers will have 2139# returned to Baltimore, which switches on that date.) 2140 2141# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2142# Cuba is not going back to standard time this year. 2143# From Paul Eggert (2006-03-22): 2144# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2145# says that it's due to a problem at the Antonio Guiteras 2146# thermoelectric plant, and says "This October there will be no return 2147# to normal hours (after daylight saving time)". 2148# For now, let's assume that it's a temporary measure. 2149 2150# From Carlos A. Carnero Delgado (2005-11-12): 2151# This year (just like in 2004-2005) there's no change in time zone 2152# adjustment in Cuba. We will stay in daylight saving time: 2153# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2154 2155# From Jesper Norgaard Welen (2006-10-21): 2156# An article in GRANMA INTERNACIONAL claims that Cuba will end 2157# the 3 years of permanent DST next weekend, see 2158# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2159# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2160# watches should be set back one hour -- going back to 00:00 hours -- returning 2161# to the normal schedule.... 2162 2163# From Paul Eggert (2007-03-02): 2164# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2165# says Cuban clocks will advance at midnight on March 10. 2166# For lack of better information, assume Cuba will use US rules, 2167# except that it switches at midnight standard time as usual. 2168 2169# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2170Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2171Rule Cuba 1928 only - Oct 10 0:00 0 S 2172Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2173Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2174Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2175Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2176Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2177Rule Cuba 1965 only - Sep 30 0:00 0 S 2178Rule Cuba 1966 only - May 29 0:00 1:00 D 2179Rule Cuba 1966 only - Oct 2 0:00 0 S 2180Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2181Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2182Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2183Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2184Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2185Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2186Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2187Rule Cuba 1978 only - May 7 0:00 1:00 D 2188Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2189Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2190Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2191Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2192Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2193Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2194Rule Cuba 1996 only - Oct 6 0:00s 0 S 2195Rule Cuba 1997 only - Oct 12 0:00s 0 S 2196Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2197Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2198Rule Cuba 2000 2006 - Apr Sun>=1 0:00s 1:00 D 2199Rule Cuba 2006 only - Oct lastSun 0:00s 0 S 2200Rule Cuba 2007 max - Mar Sun>=8 0:00s 1:00 D 2201Rule Cuba 2007 max - Nov Sun>=1 0:00s 0 S 2202 2203# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2204Zone America/Havana -5:29:28 - LMT 1890 2205 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2206 -5:00 Cuba C%sT 2207 2208# Dominica 2209# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2210Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 2211 -4:00 - AST 2212 2213# Dominican Republic 2214 2215# From Steffen Thorsen (2000-10-30): 2216# Enrique Morales reported to me that the Dominican Republic has changed the 2217# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2218# http://www.listin.com.do/antes/261000/republica/princi.html 2219 2220# From Paul Eggert (2000-12-04): 2221# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2222 2223# From Rives McDow (2000-12-01): 2224# Dominican Republic changed its mind and presidential decree on Tuesday, 2225# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2226# Dominican Republic will be reverting to 8 hours from the International Date 2227# Line, and will not be using DST in the foreseeable future. The reason they 2228# decided to use DST was to be in synch with Puerto Rico, who was also going 2229# to implement DST. When Puerto Rico didn't implement DST, the president 2230# decided to revert. 2231 2232 2233# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2234Rule DR 1966 only - Oct 30 0:00 1:00 D 2235Rule DR 1967 only - Feb 28 0:00 0 S 2236Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2237Rule DR 1970 only - Feb 21 0:00 0 S 2238Rule DR 1971 only - Jan 20 0:00 0 S 2239Rule DR 1972 1974 - Jan 21 0:00 0 S 2240# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2241Zone America/Santo_Domingo -4:39:36 - LMT 1890 2242 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2243 -5:00 DR E%sT 1974 Oct 27 2244 -4:00 - AST 2000 Oct 29 02:00 2245 -5:00 US E%sT 2000 Dec 3 01:00 2246 -4:00 - AST 2247 2248# El Salvador 2249 2250# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2251Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2252Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2253# There are too many San Salvadors elsewhere, so use America/El_Salvador 2254# instead of America/San_Salvador. 2255# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2256Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2257 -6:00 Salv C%sT 2258 2259# Grenada 2260# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2261Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 2262 -4:00 - AST 2263 2264# Guadeloupe 2265# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2266Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 2267 -4:00 - AST 2268 2269# Guatemala 2270# 2271# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2272# Diario Co Latino, at 2273# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2274# says in an article dated 2006-04-19 that the Guatemalan government had 2275# decided on that date to advance official time by 60 minutes, to lessen the 2276# impact of the elevated cost of oil.... Daylight saving time will last from 2277# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2278# From Paul Eggert (2006-06-22): 2279# The Ministry of Energy and Mines, press release CP-15/2006 2280# (2006-04-19), says DST ends at 24:00. See 2281# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2282 2283# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2284Rule Guat 1973 only - Nov 25 0:00 1:00 D 2285Rule Guat 1974 only - Feb 24 0:00 0 S 2286Rule Guat 1983 only - May 21 0:00 1:00 D 2287Rule Guat 1983 only - Sep 22 0:00 0 S 2288Rule Guat 1991 only - Mar 23 0:00 1:00 D 2289Rule Guat 1991 only - Sep 7 0:00 0 S 2290Rule Guat 2006 only - Apr 30 0:00 1:00 D 2291Rule Guat 2006 only - Oct 1 0:00 0 S 2292# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2293Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2294 -6:00 Guat C%sT 2295 2296# Haiti 2297# From Gwillim Law (2005-04-15): 2298# Risto O. Nykanen wrote me that Haiti is now on DST. 2299# I searched for confirmation, and I found a 2300# <a href="http://www.haitianconsulate.org/time.doc"> press release 2301# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2302# </a>. Translated from French, it says: 2303# 2304# "The Prime Minister's Communication Office notifies the public in general 2305# and the press in particular that, following a decision of the Interior 2306# Ministry and the Territorial Collectivities [I suppose that means the 2307# provinces], Haiti will move to Eastern Daylight Time in the night from next 2308# Saturday the 2nd to Sunday the 3rd. 2309# 2310# "Consequently, the Prime Minister's Communication Office wishes to inform 2311# the population that the country's clocks will be set forward one hour 2312# starting at midnight. This provision will hold until the last Saturday in 2313# October 2005. 2314# 2315# "Port-au-Prince, March 31, 2005" 2316# 2317# From Steffen Thorsen (2006-04-04): 2318# I have been informed by users that Haiti observes DST this year like 2319# last year, so the current "only" rule for 2005 might be changed to a 2320# "max" rule or to last until 2006. (Who knows if they will observe DST 2321# next year or if they will extend their DST like US/Canada next year). 2322# 2323# I have found this article about it (in French): 2324# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2325# 2326# The reason seems to be an energy crisis. 2327 2328# From Stephen Colebourne (2007-02-22): 2329# Some IATA info: Haiti won't be having DST in 2007. 2330 2331 2332# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2333Rule Haiti 1983 only - May 8 0:00 1:00 D 2334Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 2335Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2336# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2337# Go with IATA. 2338Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 2339Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2340Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2341Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2342# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2343Zone America/Port-au-Prince -4:49:20 - LMT 1890 2344 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 2345 -5:00 Haiti E%sT 2346 2347# Honduras 2348# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2349 2350# From Paul Eggert (2006-05-05): 2351# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2352# saying Honduras will start using DST midnight Saturday, effective 4 2353# months until September. La Tribuna reported today 2354# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2355# of Honduras, refused to back down on this. 2356 2357# From Jesper Norgaard Welen (2006-08-08): 2358# It seems that Honduras has returned from DST to standard time this Monday at 2359# 00:00 hours (prolonging Sunday to 25 hours duration). 2360# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2361 2362# From Paul Eggert (2006-08-08): 2363# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2364# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2365# It mentions executive decree 18-2006. 2366 2367# From Steffen Thorsen (2006-08-17): 2368# Honduras will observe DST from 2007 to 2009, exact dates are not 2369# published, I have located this authoritative source: 2370# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2371 2372# From Steffen Thorsen (2007-03-30): 2373# http://www.laprensahn.com/pais_nota.php?id04962=7386 2374# So it seems that Honduras will not enter DST this year.... 2375 2376# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2377Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2378Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 2379Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 2380Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 2381# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2382Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2383 -6:00 Hond C%sT 2384# 2385# Great Swan I ceded by US to Honduras in 1972 2386 2387# Jamaica 2388 2389# From Bob Devine (1988-01-28): 2390# Follows US rules. 2391 2392# From U. S. Naval Observatory (1989-01-19): 2393# JAMAICA 5 H BEHIND UTC 2394 2395# From Shanks & Pottenger: 2396# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2397Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston 2398 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2399 -5:00 - EST 1974 Apr 28 2:00 2400 -5:00 US E%sT 1984 2401 -5:00 - EST 2402 2403# Martinique 2404# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2405Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 2406 -4:04:20 - FFMT 1911 May # Fort-de-France MT 2407 -4:00 - AST 1980 Apr 6 2408 -4:00 1:00 ADT 1980 Sep 28 2409 -4:00 - AST 2410 2411# Montserrat 2412# From Paul Eggert (2006-03-22): 2413# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2414# world.gazetteer.com says Cork Hill is the most populous location now. 2415# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2416Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 2417 -4:00 - AST 2418 2419# Nicaragua 2420# 2421# This uses Shanks & Pottenger for times before 2005. 2422# 2423# From Steffen Thorsen (2005-04-12): 2424# I've got reports from 8 different people that Nicaragua just started 2425# DST on Sunday 2005-04-10, in order to save energy because of 2426# expensive petroleum. The exact end date for DST is not yet 2427# announced, only "September" but some sites also say "mid-September". 2428# Some background information is available on the President's official site: 2429# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2430# The Decree, no 23-2005 is available here: 2431# 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 2432# 2433# From Paul Eggert (2005-05-01): 2434# The decree doesn't say anything about daylight saving, but for now let's 2435# assume that it is daylight saving.... 2436# 2437# From Gwillim Law (2005-04-21): 2438# The Associated Press story on the time change, which can be found at 2439# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2440# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2441# time that a change of clocks was applied to save energy was in the year 2000 2442# during the Arnoldo Aleman administration."... 2443# The northamerica file says that Nicaragua has been on UTC-6 continuously 2444# since December 1998. I wasn't able to find any details of Nicaraguan time 2445# changes in 2000. Perhaps a note could be added to the northamerica file, to 2446# the effect that we have indirect evidence that DST was observed in 2000. 2447# 2448# From Jesper Norgaard Welen (2005-11-02): 2449# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2450# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2451# (2005-09-26) 2452# 2453# From Jesper Norgaard Welen (2006-05-05): 2454# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2455# (my informal translation) 2456# By order of the president of the republic, Enrique Bolanos, Nicaragua 2457# advanced by sixty minutes their official time, yesterday at 2 in the 2458# morning, and will stay that way until 30.th. of september. 2459# 2460# From Jesper Norgaard Welen (2006-09-30): 2461# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2462# My informal translation runs: 2463# The natural sun time is restored in all the national territory, in that the 2464# time is returned one hour at 01:00 am of October 1 of 2006. 2465# 2466# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2467Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 2468Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2469Rule Nic 2005 only - Apr 10 0:00 1:00 D 2470Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 2471Rule Nic 2006 only - Apr 30 2:00 1:00 D 2472Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 2473# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2474Zone America/Managua -5:45:08 - LMT 1890 2475 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 2476 -6:00 - CST 1973 May 2477 -5:00 - EST 1975 Feb 16 2478 -6:00 Nic C%sT 1992 Jan 1 4:00 2479 -5:00 - EST 1992 Sep 24 2480 -6:00 - CST 1993 2481 -5:00 - EST 1997 2482 -6:00 Nic C%sT 2483 2484# Panama 2485# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2486Zone America/Panama -5:18:08 - LMT 1890 2487 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 2488 -5:00 - EST 2489 2490# Puerto Rico 2491# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 2492# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2493Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 2494 -4:00 - AST 1942 May 3 2495 -4:00 US A%sT 1946 2496 -4:00 - AST 2497 2498# St Kitts-Nevis 2499# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2500Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 2501 -4:00 - AST 2502 2503# St Lucia 2504# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2505Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries 2506 -4:04:00 - CMT 1912 # Castries Mean Time 2507 -4:00 - AST 2508 2509# St Pierre and Miquelon 2510# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 2511# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2512Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 2513 -4:00 - AST 1980 May 2514 -3:00 - PMST 1987 # Pierre & Miquelon Time 2515 -3:00 Canada PM%sT 2516 2517# St Vincent and the Grenadines 2518# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2519Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 2520 -4:04:56 - KMT 1912 # Kingstown Mean Time 2521 -4:00 - AST 2522 2523# Turks and Caicos 2524# 2525# From Chris Dunn in 2526# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2527# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2528# daylight saving dates for time changes have been adjusted to match 2529# the recent U.S. change of dates. 2530# 2531# From Brian Inglis (2007-04-28): 2532# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2533# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2534# rows before that there is an out of date entry for Oct: 2535# "Eastern Standard Times Begins 2007 2536# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2537# indicating that the normal ET rules are followed. 2538# 2539# From Paul Eggert (2006-05-01): 2540# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 2541# says they switch at midnight. Go with Shanks & Pottenger. 2542# 2543# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2544Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 2545Rule TC 1979 2006 - Oct lastSun 2:00 0 S 2546Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 2547Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 2548Rule TC 2007 max - Nov Sun>=1 2:00 0 S 2549# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2550Zone America/Grand_Turk -4:44:32 - LMT 1890 2551 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2552 -5:00 TC E%sT 2553 2554# British Virgin Is 2555# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2556Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 2557 -4:00 - AST 2558 2559# Virgin Is 2560# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2561Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 2562 -4:00 - AST 2563