northamerica revision 218122
1# <pre> 2# %W% 3# This file is in the public domain, so clarified as of 4# 2009-05-17 by Arthur David Olson. 5 6# also includes Central America and the Caribbean 7 8# This data is by no means authoritative; if you think you know better, 9# go ahead and edit the file (and please send any changes to 10# tz@elsie.nci.nih.gov for general use in the future). 11 12# From Paul Eggert (1999-03-22): 13# A reliable and entertaining source about time zones is 14# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 15 16############################################################################### 17 18# United States 19 20# From Paul Eggert (1999-03-31): 21# Howse writes (pp 121-125) that time zones were invented by 22# Professor Charles Ferdinand Dowd (1825-1904), 23# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 24# His pamphlet ``A System of National Time for Railroads'' (1870) 25# was the result of his proposals at the Convention of Railroad Trunk Lines 26# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 27# but in 1872-05 he moved the proposed origin to Greenwich. 28# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 29# and the most of the country soon followed suit. 30 31# From Paul Eggert (2005-04-16): 32# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 33# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 34 35# From Paul Eggert (2006-03-22): 36# A good source for time zone historical data in the US is 37# Thomas G. Shanks, The American Atlas (5th edition), 38# San Diego: ACS Publications, Inc. (1991). 39# Make sure you have the errata sheet; the book is somewhat useless without it. 40# It is the source for most of the pre-1991 US entries below. 41 42# From Paul Eggert (2001-03-06): 43# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 44# in his whimsical essay ``An Economical Project for Diminishing the Cost 45# of Light'' published in the Journal de Paris (1784-04-26). 46# Not everyone is happy with the results: 47# 48# I don't really care how time is reckoned so long as there is some 49# agreement about it, but I object to being told that I am saving 50# daylight when my reason tells me that I am doing nothing of the kind. 51# I even object to the implication that I am wasting something 52# valuable if I stay in bed after the sun has risen. As an admirer 53# of moonlight I resent the bossy insistence of those who want to 54# reduce my time for enjoying it. At the back of the Daylight Saving 55# scheme I detect the bony, blue-fingered hand of Puritanism, eager 56# to push people into bed earlier, and get them up earlier, to make 57# them healthy, wealthy and wise in spite of themselves. 58# 59# -- Robertson Davies, The diary of Samuel Marchbanks, 60# Clarke, Irwin (1947), XIX, Sunday 61# 62# For more about the first ten years of DST in the United States, see 63# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 64# Ten years of daylight saving from the Pittsburgh standpoint 65# (Carnegie Library of Pittsburgh, 1927)</a>. 66# 67# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 68# However, DST was imposed by the Standard Time Act of 1918, which 69# was the first nationwide legal time standard, and apparently 70# time was just called "Standard Time" or "Daylight Saving Time". 71 72# From Arthur David Olson: 73# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 74# See, for example, the front page of the Saturday, 1974-10-26 75# and Sunday, 1974-10-27 editions of the Washington Post. 76 77# From Arthur David Olson: 78# Before the Uniform Time Act of 1966 took effect in 1967, observance of 79# Daylight Saving Time in the US was by local option, except during wartime. 80 81# From Arthur David Olson (2000-09-25): 82# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 83# In the introduction, Oboler spoke of "Eastern Peace Time." 84# An AltaVista search turned up 85# <a href="http://rowayton.org/rhs/hstaug45.html">: 86# "When the time is announced over the radio now, it is 'Eastern Peace 87# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 88# </a> (August 1945) by way of confirmation. 89 90# From Joseph Gallant citing 91# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 92# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 93# to switch to London for Attlee's address, but the American people 94# never got to hear his speech live. According to one press account, 95# CBS' Bob Trout was first to announce the word of Japan's surrender, 96# but a few seconds later, NBC, ABC and Mutual also flashed the word 97# of surrender, all of whom interrupting the bells of Big Ben in 98# London which were to precede Mr. Attlee's speech. 99 100# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 101# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 102# 103# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 104# Any announcement from Asia would reach St. John's New York newsroom on a 105# wire service teletype machine, which had prescribed signals for major news. 106# Associated Press, for example, would ring five bells before spewing out 107# typed copy of an important story, and 10 bells for news "of transcendental 108# importance." 109# 110# On Aug. 14, stalling while talking steadily into the NBC networks' open 111# microphone, St. John heard five bells and waited only to hear a sixth bell, 112# before announcing confidently: "Ladies and gentlemen, World War II is over. 113# The Japanese have agreed to our surrender terms." 114# 115# He had scored a 20-second scoop on other broadcasters. 116 117# From Arthur David Olson (2005-08-22): 118# Paul has been careful to use the "US" rules only in those locations 119# that are part of the United States; this reflects the real scope of 120# U.S. government action. So even though the "US" rules have changed 121# in the latest release, other countries won't be affected. 122 123# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 124Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 125Rule US 1918 1919 - Oct lastSun 2:00 0 S 126Rule US 1942 only - Feb 9 2:00 1:00 W # War 127Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 128Rule US 1945 only - Sep 30 2:00 0 S 129Rule US 1967 2006 - Oct lastSun 2:00 0 S 130Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 131Rule US 1974 only - Jan 6 2:00 1:00 D 132Rule US 1975 only - Feb 23 2:00 1:00 D 133Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 134Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 135Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 136Rule US 2007 max - Nov Sun>=1 2:00 0 S 137 138# From Arthur David Olson, 2005-12-19 139# We generate the files specified below to guard against old files with 140# obsolete information being left in the time zone binary directory. 141# We limit the list to names that have appeared in previous versions of 142# this time zone package. 143# We do these as separate Zones rather than as Links to avoid problems if 144# a particular place changes whether it observes DST. 145# We put these specifications here in the northamerica file both to 146# increase the chances that they'll actually get compiled and to 147# avoid the need to duplicate the US rules in another file. 148 149# Zone NAME GMTOFF RULES FORMAT [UNTIL] 150Zone EST -5:00 - EST 151Zone MST -7:00 - MST 152Zone HST -10:00 - HST 153Zone EST5EDT -5:00 US E%sT 154Zone CST6CDT -6:00 US C%sT 155Zone MST7MDT -7:00 US M%sT 156Zone PST8PDT -8:00 US P%sT 157 158# From Bob Devine (1988-01-28): 159# ...Alaska (and Hawaii) had the timezone names changed in 1967. 160# old new 161# Pacific Standard Time(PST) -same- 162# Yukon Standard Time(YST) -same- 163# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 164# Nome Standard Time (NT) Bering Standard Time (BST) 165# 166# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 167# The YST zone now covers nearly all of the state, AHST just part 168# of the Aleutian islands. No DST. 169 170# From Paul Eggert (1995-12-19): 171# The tables below use `NST', not `NT', for Nome Standard Time. 172# I invented `CAWT' for Central Alaska War Time. 173 174# From U. S. Naval Observatory (1989-01-19): 175# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 176# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 177# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 178# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 179# USA MOUNTAIN 7 H BEHIND UTC DENVER 180# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 181# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 182# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 183# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 184# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 185# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 186# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 187# USA HAWAII 10 H BEHIND UTC 188# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 189 190# From Arthur David Olson (1989-01-21): 191# The above dates are for 1988. 192# Note the "AKST" and "AKDT" abbreviations, the claim that there's 193# no DST in Samoa, and the claim that there is DST in Alaska and the 194# Aleutians. 195 196# From Arthur David Olson (1988-02-13): 197# Legal standard time zone names, from United States Code (1982 Edition and 198# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 199# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 200# took effect), as explained in sections 263 and 261: 201# (none) 202# United States standard eastern time 203# United States standard mountain time 204# United States standard central time 205# United States standard Pacific time 206# (none) 207# United States standard Alaska time 208# (none) 209# Next, names from 1967-04-01 until 1983-11-30 (the date for 210# public law 98-181): 211# Atlantic standard time 212# eastern standard time 213# central standard time 214# mountain standard time 215# Pacific standard time 216# Yukon standard time 217# Alaska-Hawaii standard time 218# Bering standard time 219# And after 1983-11-30: 220# Atlantic standard time 221# eastern standard time 222# central standard time 223# mountain standard time 224# Pacific standard time 225# Alaska standard time 226# Hawaii-Aleutian standard time 227# Samoa standard time 228# The law doesn't give abbreviations. 229# 230# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 231# Public law 106-564 (2000-12-23) introduced the abbreviation 232# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 233# See the file "australasia". 234 235# From Arthur David Olson, 2005-08-09 236# The following was signed into law on 2005-08-08. 237# 238# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 239# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 240# U.S.C. 260a(a)) is amended-- 241# (1) by striking `first Sunday of April' and inserting `second 242# Sunday of March'; and 243# (2) by striking `last Sunday of October' and inserting `first 244# Sunday of November'. 245# (b) Effective Date- Subsection (a) shall take effect 1 year after the 246# date of enactment of this Act or March 1, 2007, whichever is later. 247# (c) Report to Congress- Not later than 9 months after the effective 248# date stated in subsection (b), the Secretary shall report to Congress 249# on the impact of this section on energy consumption in the United 250# States. 251# (d) Right to Revert- Congress retains the right to revert the 252# Daylight Saving Time back to the 2005 time schedules once the 253# Department study is complete. 254 255# US eastern time, represented by New York 256 257# Connecticut, Delaware, District of Columbia, most of Florida, 258# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 259# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 260# New Hampshire, New Jersey, New York, North Carolina, Ohio, 261# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 262# Vermont, Virginia, West Virginia 263 264# From Dave Cantor (2004-11-02): 265# Early this summer I had the occasion to visit the Mount Washington 266# Observatory weather station atop (of course!) Mount Washington [, NH].... 267# One of the staff members said that the station was on Eastern Standard Time 268# and didn't change their clocks for Daylight Saving ... so that their 269# reports will always have times which are 5 hours behind UTC. 270 271# From Paul Eggert (2005-08-26): 272# According to today's Huntsville Times 273# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 274# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 275# in Russell County, Lanett in Chambers County and some towns in Lee County, 276# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 277# Roberts, city administrator in Phenix City. as saying "We are in the Central 278# time zone, but we do go by the Eastern time zone because so many people work 279# in Columbus." 280 281# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 282Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 283Rule NYC 1920 only - Oct lastSun 2:00 0 S 284Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 285Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 286Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 287# Zone NAME GMTOFF RULES FORMAT [UNTIL] 288Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 289 -5:00 US E%sT 1920 290 -5:00 NYC E%sT 1942 291 -5:00 US E%sT 1946 292 -5:00 NYC E%sT 1967 293 -5:00 US E%sT 294 295# US central time, represented by Chicago 296 297# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 298# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 299# Washington counties), Illinois, western Indiana 300# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 301# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 302# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 303# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 304# western Tennessee, most of Texas, Wisconsin 305 306# From Larry M. Smith (2006-04-26) re Wisconsin: 307# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 308# is currently enforced at the 01:00 time of change. Because the local 309# "bar time" in the state corresponds to 02:00, a number of citations 310# are issued for the "sale of class 'B' alcohol after prohibited 311# hours" within the deviated hour of this change every year.... 312# 313# From Douglas R. Bomberg (2007-03-12): 314# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 315# Statue 175 closer in synch with the US Congress' intent.... 316# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 317 318# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 319Rule Chicago 1920 only - Jun 13 2:00 1:00 D 320Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 321Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 322Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 323Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 324Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 325# Zone NAME GMTOFF RULES FORMAT [UNTIL] 326Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 327 -6:00 US C%sT 1920 328 -6:00 Chicago C%sT 1936 Mar 1 2:00 329 -5:00 - EST 1936 Nov 15 2:00 330 -6:00 Chicago C%sT 1942 331 -6:00 US C%sT 1946 332 -6:00 Chicago C%sT 1967 333 -6:00 US C%sT 334# Oliver County, ND switched from mountain to central time on 1992-10-25. 335Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 336 -7:00 US M%sT 1992 Oct 25 02:00 337 -6:00 US C%sT 338# Morton County, ND, switched from mountain to central time on 339# 2003-10-26, except for the area around Mandan which was already central time. 340# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 341# Officially this switch also included part of Sioux County, and 342# Jones, Mellette, and Todd Counties in South Dakota; 343# but in practice these other counties were already observing central time. 344# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 345Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 346 -7:00 US M%sT 2003 Oct 26 02:00 347 -6:00 US C%sT 348 349# US mountain time, represented by Denver 350# 351# Colorado, far western Kansas, Montana, western 352# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 353# New Mexico, southwestern North Dakota, 354# western South Dakota, far western Texas (El Paso County, Hudspeth County, 355# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 356# 357# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 358Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 359Rule Denver 1920 only - Oct lastSun 2:00 0 S 360Rule Denver 1921 only - May 22 2:00 0 S 361Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 362Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 363# Zone NAME GMTOFF RULES FORMAT [UNTIL] 364Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 365 -7:00 US M%sT 1920 366 -7:00 Denver M%sT 1942 367 -7:00 US M%sT 1946 368 -7:00 Denver M%sT 1967 369 -7:00 US M%sT 370 371# US Pacific time, represented by Los Angeles 372# 373# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 374# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 375# and the northern three-quarters of Idaho county), 376# most of Nevada, most of Oregon, and Washington 377# 378# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 379Rule CA 1948 only - Mar 14 2:00 1:00 D 380Rule CA 1949 only - Jan 1 2:00 0 S 381Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 382Rule CA 1950 1961 - Sep lastSun 2:00 0 S 383Rule CA 1962 1966 - Oct lastSun 2:00 0 S 384# Zone NAME GMTOFF RULES FORMAT [UNTIL] 385Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 386 -8:00 US P%sT 1946 387 -8:00 CA P%sT 1967 388 -8:00 US P%sT 389 390# Alaska 391# AK%sT is the modern abbreviation for -9:00 per USNO. 392# 393# From Paul Eggert (2001-05-30): 394# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 395# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 396# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 397# also a Friday. Include only the time zone part of this transition, 398# ignoring the switch from Julian to Gregorian, since we can't represent 399# the Julian calendar. 400# 401# As far as we know, none of the exact locations mentioned below were 402# permanently inhabited in 1867 by anyone using either calendar. 403# (Yakutat was colonized by the Russians in 1799, but the settlement 404# was destroyed in 1805 by a Yakutat-kon war party.) However, there 405# were nearby inhabitants in some cases and for our purposes perhaps 406# it's best to simply use the official transition. 407# 408# Zone NAME GMTOFF RULES FORMAT [UNTIL] 409Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 410 -8:57:41 - LMT 1900 Aug 20 12:00 411 -8:00 - PST 1942 412 -8:00 US P%sT 1946 413 -8:00 - PST 1969 414 -8:00 US P%sT 1983 Oct 30 2:00 415 -9:00 US Y%sT 1983 Nov 30 416 -9:00 US AK%sT 417Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 418 -9:18:55 - LMT 1900 Aug 20 12:00 419 -9:00 - YST 1942 420 -9:00 US Y%sT 1946 421 -9:00 - YST 1969 422 -9:00 US Y%sT 1983 Nov 30 423 -9:00 US AK%sT 424Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 425 -9:59:36 - LMT 1900 Aug 20 12:00 426 -10:00 - CAT 1942 427 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 428 -10:00 US CAT/CAPT 1946 # Peace 429 -10:00 - CAT 1967 Apr 430 -10:00 - AHST 1969 431 -10:00 US AH%sT 1983 Oct 30 2:00 432 -9:00 US Y%sT 1983 Nov 30 433 -9:00 US AK%sT 434Zone America/Nome 12:58:21 - LMT 1867 Oct 18 435 -11:01:38 - LMT 1900 Aug 20 12:00 436 -11:00 - NST 1942 437 -11:00 US N%sT 1946 438 -11:00 - NST 1967 Apr 439 -11:00 - BST 1969 440 -11:00 US B%sT 1983 Oct 30 2:00 441 -9:00 US Y%sT 1983 Nov 30 442 -9:00 US AK%sT 443Zone America/Adak 12:13:21 - LMT 1867 Oct 18 444 -11:46:38 - LMT 1900 Aug 20 12:00 445 -11:00 - NST 1942 446 -11:00 US N%sT 1946 447 -11:00 - NST 1967 Apr 448 -11:00 - BST 1969 449 -11:00 US B%sT 1983 Oct 30 2:00 450 -10:00 US AH%sT 1983 Nov 30 451 -10:00 US HA%sT 452# The following switches don't quite make our 1970 cutoff. 453# 454# Shanks writes that part of southwest Alaska (e.g. Aniak) 455# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 456# and another part (e.g. Akiak) made the same switch five weeks later. 457# 458# From David Flater (2004-11-09): 459# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 460# Historic Preservation Commission, provided this information, which 461# suggests that Unalaska deviated from statutory time from early 1967 462# possibly until 1983: 463# 464# Minutes of the Unalaska City Council Meeting, January 10, 1967: 465# "Except for St. Paul and Akutan, Unalaska is the only important 466# location not on Alaska Standard Time. The following resolution was 467# made by William Robinson and seconded by Henry Swanson: Be it 468# resolved that the City of Unalaska hereby goes to Alaska Standard 469# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 470# January 14, Alaska Standard Time.) This resolution was passed with 471# three votes for and one against." 472 473# Hawaii 474 475# From Arthur David Olson (2010-12-09): 476# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 477# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 478# the article is available at 479# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 480# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 481# </a> 482# and indicates that standard time was adopted effective noon, January 483# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 484# saving for the period between the last Sunday of each April and the 485# last Sunday of each September, but less than a month later repealed the 486# act," (page 220), that year-round daylight saving time was in effect 487# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 488# when clocks changed) and that clocks were changed by 30 minutes 489# effective the second Sunday of June, 1947 (page 219, with no time of 490# day given for when clocks changed). A footnote for the 1933 changes 491# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 492# and Act 163 (approved 21 May 1933)." 493 494# From Arthur David Olson (2011-01-19): 495# The following is from "Laws of the Territory of Hawaii Passed by the 496# Seventeenth Legislature: Regular Session 1933," available (as of 497# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 498# 90...At 2 o'clock ante meridian of the last Sunday in April of each 499# year, the standard time of this Territory shall be advanced one 500# hour...This Act shall take effect upon its approval. Approved this 26th 501# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 502# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 503# hereby repealed...This Act shall take effect upon its approval, upon 504# which date the standard time of this Territory shall be restored to 505# that existing immediately prior to the taking effect of said Act 90. 506# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 507# of the Territory of Hawaii." 508# 509# Note that 1933-05-21 was a Sunday. 510# We're left to guess the time of day when Act 163 was approved; guess noon. 511 512Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 513 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 514 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 515 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 516 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Fox+2 517 -10:30 US H%sT 1947 Jun 8 2:00 #Schmitt&Fox+2 518 -10:00 - HST 519 520# Now we turn to US areas that have diverged from the consensus since 1970. 521 522# Arizona mostly uses MST. 523 524# From Paul Eggert (2002-10-20): 525# 526# The information in the rest of this paragraph is derived from the 527# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 528# Daylight Saving Time web page (2002-01-23)</a> maintained by the 529# Arizona State Library, Archives and Public Records. 530# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 531# time, but by federal law railroads, airlines, bus lines, military 532# personnel, and some engaged in interstate commerce continued to 533# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 534# Gazette says that was the date the law changed, and that 04-01 was 535# the date the state's clocks would change. In 1945 the State of 536# Arizona used standard time all year, again with exceptions only as 537# mandated by federal law. Arizona observed DST in 1967, but Arizona 538# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 539# 540# Shanks says the 1944 experiment came to an end on 1944-03-17. 541# Go with the Arizona State Library instead. 542 543Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 544 -7:00 US M%sT 1944 Jan 1 00:01 545 -7:00 - MST 1944 Apr 1 00:01 546 -7:00 US M%sT 1944 Oct 1 00:01 547 -7:00 - MST 1967 548 -7:00 US M%sT 1968 Mar 21 549 -7:00 - MST 550# From Arthur David Olson (1988-02-13): 551# A writer from the Inter Tribal Council of Arizona, Inc., 552# notes in private correspondence dated 1987-12-28 that "Presently, only the 553# Navajo Nation participates in the Daylight Saving Time policy, due to its 554# large size and location in three states." (The "only" means that other 555# tribal nations don't use DST.) 556 557Link America/Denver America/Shiprock 558 559# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 560# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 561# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 562# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 563# Teton, Twin Falls, Valley, Washington counties, and the southern 564# quarter of Idaho county) and eastern Oregon (most of Malheur County) 565# switched four weeks late in 1974. 566# 567# Zone NAME GMTOFF RULES FORMAT [UNTIL] 568Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 569 -8:00 US P%sT 1923 May 13 2:00 570 -7:00 US M%sT 1974 571 -7:00 - MST 1974 Feb 3 2:00 572 -7:00 US M%sT 573 574# Indiana 575# 576# For a map of Indiana's time zone regions, see: 577# <a href="http://www.mccsc.edu/time.html"> 578# What time is it in Indiana? 579# </a> (2006-03-01) 580# 581# From Paul Eggert (2007-08-17): 582# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 583# with the following exceptions: 584# 585# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 586# Vandenburgh, and Warrick counties have been like America/Chicago. 587# 588# - Dearborn and Ohio counties have been like America/New_York. 589# 590# - Clark, Floyd, and Harrison counties have been like 591# America/Kentucky/Louisville. 592# 593# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 594# and Switzerland counties have their own time zone histories as noted below. 595# 596# Shanks partitioned Indiana into 345 regions, each with its own time history, 597# and wrote ``Even newspaper reports present contradictory information.'' 598# Those Hoosiers! Such a flighty and changeable people! 599# Fortunately, most of the complexity occurred before our cutoff date of 1970. 600# 601# Other than Indianapolis, the Indiana place names are so nondescript 602# that they would be ambiguous if we left them at the `America' level. 603# So we reluctantly put them all in a subdirectory `America/Indiana'. 604 605# From Paul Eggert (2005-08-16): 606# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 607 608# From Nathan Stratton Treadway (2006-03-30): 609# http://www.dot.gov/affairs/dot0406.htm [3705 B] 610# From Deborah Goldsmith (2006-01-18): 611# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 612# From Paul Eggert (2006-01-20): 613# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 614# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 615# Eastern Time Zone to the Central Time Zone.... The effective date of 616# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 617# changeover date from standard time to Daylight Saving Time." 618# Strictly speaking, this means the affected counties will change their 619# clocks twice that night, but this obviously is in error. The intent 620# is that 01:59:59 EST be followed by 02:00:00 CDT. 621 622# From Gwillim Law (2007-02-10): 623# The Associated Press has been reporting that Pulaski County, Indiana is 624# going to switch from Central to Eastern Time on March 11, 2007.... 625# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 626 627# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 628Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 629Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 630Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 631# Zone NAME GMTOFF RULES FORMAT [UNTIL] 632Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 633 -6:00 US C%sT 1920 634 -6:00 Indianapolis C%sT 1942 635 -6:00 US C%sT 1946 636 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 637 -5:00 - EST 1957 Sep 29 2:00 638 -6:00 - CST 1958 Apr 27 2:00 639 -5:00 - EST 1969 640 -5:00 US E%sT 1971 641 -5:00 - EST 2006 642 -5:00 US E%sT 643# 644# Eastern Crawford County, Indiana, left its clocks alone in 1974, 645# as well as from 1976 through 2005. 646# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 647Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 648Rule Marengo 1951 only - Sep lastSun 2:00 0 S 649Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 650Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 651# Zone NAME GMTOFF RULES FORMAT [UNTIL] 652Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 653 -6:00 US C%sT 1951 654 -6:00 Marengo C%sT 1961 Apr 30 2:00 655 -5:00 - EST 1969 656 -5:00 US E%sT 1974 Jan 6 2:00 657 -6:00 1:00 CDT 1974 Oct 27 2:00 658 -5:00 US E%sT 1976 659 -5:00 - EST 2006 660 -5:00 US E%sT 661# 662# Daviess, Dubois, Knox, and Martin Counties, Indiana, 663# switched from eastern to central time in April 2006, then switched back 664# in November 2007. 665# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 666Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 667Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 668Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 669Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 670Rule Vincennes 1955 only - May 1 0:00 1:00 D 671Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 672Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 673Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 674Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 675# Zone NAME GMTOFF RULES FORMAT [UNTIL] 676Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 677 -6:00 US C%sT 1946 678 -6:00 Vincennes C%sT 1964 Apr 26 2:00 679 -5:00 - EST 1969 680 -5:00 US E%sT 1971 681 -5:00 - EST 2006 Apr 2 2:00 682 -6:00 US C%sT 2007 Nov 4 2:00 683 -5:00 US E%sT 684# 685# Perry County, Indiana, switched from eastern to central time in April 2006. 686# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 687Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 688Rule Perry 1946 only - Sep lastSun 2:00 0 S 689Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 690Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 691Rule Perry 1955 only - May 1 0:00 1:00 D 692Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 693Rule Perry 1960 only - Oct lastSun 2:00 0 S 694Rule Perry 1961 only - Sep lastSun 2:00 0 S 695Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 696# Zone NAME GMTOFF RULES FORMAT [UNTIL] 697Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 698 -6:00 US C%sT 1946 699 -6:00 Perry C%sT 1964 Apr 26 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 704# 705# Pike County, Indiana moved from central to eastern time in 1977, 706# then switched back in 2006, then switched back again in 2007. 707# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 708Rule Pike 1955 only - May 1 0:00 1:00 D 709Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 710Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 711Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 712# Zone NAME GMTOFF RULES FORMAT [UNTIL] 713Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 714 -6:00 US C%sT 1955 715 -6:00 Pike C%sT 1965 Apr 25 2:00 716 -5:00 - EST 1966 Oct 30 2:00 717 -6:00 US C%sT 1977 Oct 30 2:00 718 -5:00 - EST 2006 Apr 2 2:00 719 -6:00 US C%sT 2007 Nov 4 2:00 720 -5:00 US E%sT 721# 722# Starke County, Indiana moved from central to eastern time in 1991, 723# then switched back in 2006. 724# From Arthur David Olson (1991-10-28): 725# An article on page A3 of the Sunday, 1991-10-27 Washington Post 726# notes that Starke County switched from Central time to Eastern time as of 727# 1991-10-27. 728# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 729Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 730Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 731Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 732Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 733Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 734# Zone NAME GMTOFF RULES FORMAT [UNTIL] 735Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 736 -6:00 US C%sT 1947 737 -6:00 Starke C%sT 1962 Apr 29 2:00 738 -5:00 - EST 1963 Oct 27 2:00 739 -6:00 US C%sT 1991 Oct 27 2:00 740 -5:00 - EST 2006 Apr 2 2:00 741 -6:00 US C%sT 742# 743# Pulaski County, Indiana, switched from eastern to central time in 744# April 2006 and then switched back in March 2007. 745# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 746Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 747Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 748Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 749Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 750# Zone NAME GMTOFF RULES FORMAT [UNTIL] 751Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 752 -6:00 US C%sT 1946 753 -6:00 Pulaski C%sT 1961 Apr 30 2:00 754 -5:00 - EST 1969 755 -5:00 US E%sT 1971 756 -5:00 - EST 2006 Apr 2 2:00 757 -6:00 US C%sT 2007 Mar 11 2:00 758 -5:00 US E%sT 759# 760# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 761# Zone NAME GMTOFF RULES FORMAT [UNTIL] 762Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 763 -6:00 US C%sT 1954 Apr 25 2:00 764 -5:00 - EST 1969 765 -5:00 US E%sT 1973 766 -5:00 - EST 2006 767 -5:00 US E%sT 768 769# Part of Kentucky left its clocks alone in 1974. 770# This also includes Clark, Floyd, and Harrison counties in Indiana. 771# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 772Rule Louisville 1921 only - May 1 2:00 1:00 D 773Rule Louisville 1921 only - Sep 1 2:00 0 S 774Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 775Rule Louisville 1941 only - Sep lastSun 2:00 0 S 776Rule Louisville 1946 only - Jun 2 2:00 0 S 777Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 778Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 779# Zone NAME GMTOFF RULES FORMAT [UNTIL] 780Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 781 -6:00 US C%sT 1921 782 -6:00 Louisville C%sT 1942 783 -6:00 US C%sT 1946 784 -6:00 Louisville C%sT 1961 Jul 23 2:00 785 -5:00 - EST 1968 786 -5:00 US E%sT 1974 Jan 6 2:00 787 -6:00 1:00 CDT 1974 Oct 27 2:00 788 -5:00 US E%sT 789# 790# Wayne County, Kentucky 791# 792# From 793# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 794# Lake Cumberland LIFE 795# </a> (1999-01-29) via WKYM-101.7: 796# Clinton County has joined Wayne County in asking the DoT to change from 797# the Central to the Eastern time zone.... The Wayne County government made 798# the same request in December. And while Russell County officials have not 799# taken action, the majority of respondents to a poll conducted there in 800# August indicated they would like to change to "fast time" also. 801# The three Lake Cumberland counties are the farthest east of any U.S. 802# location in the Central time zone. 803# 804# From Rich Wales (2000-08-29): 805# After prolonged debate, and despite continuing deep differences of opinion, 806# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 807# (-0500) time. They won't "fall back" this year. See Sara Shipley, 808# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 809# 810# From Paul Eggert (2001-07-16): 811# The final rule was published in the 812# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 813# Federal Register 65, 160 (2000-08-17), page 50154-50158. 814# </a> 815# 816Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 817 -6:00 US C%sT 1946 818 -6:00 - CST 1968 819 -6:00 US C%sT 2000 Oct 29 2:00 820 -5:00 US E%sT 821 822 823# From Rives McDow (2000-08-30): 824# Here ... are all the changes in the US since 1985. 825# Kearny County, KS (put all of county on central; 826# previously split between MST and CST) ... 1990-10 827# Starke County, IN (from CST to EST) ... 1991-10 828# Oliver County, ND (from MST to CST) ... 1992-10 829# West Wendover, NV (from PST TO MST) ... 1999-10 830# Wayne County, KY (from CST to EST) ... 2000-10 831# 832# From Paul Eggert (2001-07-17): 833# We don't know where the line used to be within Kearny County, KS, 834# so omit that change for now. 835# See America/Indiana/Knox for the Starke County, IN change. 836# See America/North_Dakota/Center for the Oliver County, ND change. 837# West Wendover, NV officially switched from Pacific to mountain time on 838# 1999-10-31. See the 839# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 840# Federal Register 64, 203 (1999-10-21), page 56705-56707. 841# </a> 842# However, the Federal Register says that West Wendover already operated 843# on mountain time, and the rule merely made this official; 844# hence a separate tz entry is not needed. 845 846# Michigan 847# 848# From Bob Devine (1988-01-28): 849# Michigan didn't observe DST from 1968 to 1973. 850# 851# From Paul Eggert (1999-03-31): 852# Shanks writes that Michigan started using standard time on 1885-09-18, 853# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 854# that Detroit kept 855# 856# local time until 1900 when the City Council decreed that clocks should 857# be put back twenty-eight minutes to Central Standard Time. Half the 858# city obeyed, half refused. After considerable debate, the decision 859# was rescinded and the city reverted to Sun time. A derisive offer to 860# erect a sundial in front of the city hall was referred to the 861# Committee on Sewers. Then, in 1905, Central time was adopted 862# by city vote. 863# 864# This story is too entertaining to be false, so go with Howse over Shanks. 865# 866# From Paul Eggert (2001-03-06): 867# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 868# one hour in 1914.'' This change is not in Shanks. We have no more 869# info, so omit this for now. 870# 871# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 872# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 873Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 874Rule Detroit 1948 only - Sep lastSun 2:00 0 S 875Rule Detroit 1967 only - Jun 14 2:00 1:00 D 876Rule Detroit 1967 only - Oct lastSun 2:00 0 S 877# Zone NAME GMTOFF RULES FORMAT [UNTIL] 878Zone America/Detroit -5:32:11 - LMT 1905 879 -6:00 - CST 1915 May 15 2:00 880 -5:00 - EST 1942 881 -5:00 US E%sT 1946 882 -5:00 Detroit E%sT 1973 883 -5:00 US E%sT 1975 884 -5:00 - EST 1975 Apr 27 2:00 885 -5:00 US E%sT 886# 887# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 888# switched from EST to CST/CDT in 1973. 889# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 890Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 891Rule Menominee 1946 only - Sep lastSun 2:00 0 S 892Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 893Rule Menominee 1966 only - Oct lastSun 2:00 0 S 894# Zone NAME GMTOFF RULES FORMAT [UNTIL] 895Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 896 -6:00 US C%sT 1946 897 -6:00 Menominee C%sT 1969 Apr 27 2:00 898 -5:00 - EST 1973 Apr 29 2:00 899 -6:00 US C%sT 900 901# Navassa 902# administered by the US Fish and Wildlife Service 903# claimed by US under the provisions of the 1856 Guano Islands Act 904# also claimed by Haiti 905# occupied 1857/1900 by the Navassa Phosphate Co 906# US lighthouse 1917/1996-09 907# currently uninhabited 908# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 909# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 910# Jimmy Skaggs, _The Great Guano Rush_ (1994). 911 912################################################################################ 913 914 915# From Paul Eggert (2006-03-22): 916# A good source for time zone historical data outside the U.S. is 917# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 918# San Diego: ACS Publications, Inc. (2003). 919# 920# Gwillim Law writes that a good source 921# for recent time zone data is the International Air Transport 922# Association's Standard Schedules Information Manual (IATA SSIM), 923# published semiannually. Law sent in several helpful summaries 924# of the IATA's data after 1990. 925# 926# Except where otherwise noted, Shanks & Pottenger is the source for 927# entries through 1990, and IATA SSIM is the source for entries afterwards. 928# 929# Other sources occasionally used include: 930# 931# Edward W. Whitman, World Time Differences, 932# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 933# which I found in the UCLA library. 934# 935# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 936# William Willett, The Waste of Daylight, 19th edition 937# </a> (1914-03) 938# 939# See the `europe' file for Greenland. 940 941# Canada 942 943# From Alain LaBont<e'> (1994-11-14): 944# I post here the time zone abbreviations standardized in Canada 945# for both English and French in the CAN/CSA-Z234.4-89 standard.... 946# 947# UTC Standard time Daylight savings time 948# offset French English French English 949# -2:30 - - HAT NDT 950# -3 - - HAA ADT 951# -3:30 HNT NST - - 952# -4 HNA AST HAE EDT 953# -5 HNE EST HAC CDT 954# -6 HNC CST HAR MDT 955# -7 HNR MST HAP PDT 956# -8 HNP PST HAY YDT 957# -9 HNY YST - - 958# 959# HN: Heure Normale ST: Standard Time 960# HA: Heure Avanc<e'>e DT: Daylight saving Time 961# 962# A: de l'Atlantique Atlantic 963# C: du Centre Central 964# E: de l'Est Eastern 965# M: Mountain 966# N: Newfoundland 967# P: du Pacifique Pacific 968# R: des Rocheuses 969# T: de Terre-Neuve 970# Y: du Yukon Yukon 971# 972# From Paul Eggert (1994-11-22): 973# Alas, this sort of thing must be handled by localization software. 974 975# Unless otherwise specified, the data for Canada are all from Shanks 976# & Pottenger. 977 978# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 979# 2007-03-01): 980# The British Columbia government announced yesterday that it will 981# adjust daylight savings next year to align with changes in the 982# U.S. and the rest of Canada.... 983# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 984# ... 985# Nova Scotia 986# Daylight saving time will be extended by four weeks starting in 2007.... 987# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 988# 989# [For New Brunswick] the new legislation dictates that the time change is to 990# be done at 02:00 instead of 00:01. 991# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 992# ... 993# Manitoba has traditionally changed the clock every fall at 03:00. 994# As of 2006, the transition is to take place one hour earlier at 02:00. 995# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 996# ... 997# [Alberta, Ontario, Quebec] will follow US rules. 998# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 999# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1000# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1001# ... 1002# P.E.I. will follow US rules.... 1003# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1004# ... 1005# Province of Newfoundland and Labrador.... 1006# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1007# ... 1008# Yukon 1009# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1010# ... 1011# N.W.T. will follow US rules. Whoever maintains the government web site 1012# does not seem to believe in bookmarks. To see the news release, click the 1013# following link and search for "Daylight Savings Time Change". Press the 1014# "Daylight Savings Time Change" link; it will fire off a popup using 1015# JavaScript. 1016# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1017# ... 1018# Nunavut 1019# An amendment to the Interpretation Act was registered on February 19/2007.... 1020# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1021 1022# From Paul Eggert (2006-04-25): 1023# H. David Matthews and Mary Vincent's map 1024# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 1025# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1026# </a> contains detailed boundaries for regions observing nonstandard 1027# time and daylight saving time arrangements in Canada circa 1998. 1028# 1029# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1030# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 1031# information about standard and daylight saving time zones in Canada. 1032# </a> (updated periodically). 1033# Its unofficial information is often taken from Matthews and Vincent. 1034 1035# From Paul Eggert (2006-06-27): 1036# For now, assume all of DST-observing Canada will fall into line with the 1037# new US DST rules, 1038 1039# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1040Rule Canada 1918 only - Apr 14 2:00 1:00 D 1041Rule Canada 1918 only - Oct 31 2:00 0 S 1042Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1043Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1044Rule Canada 1945 only - Sep 30 2:00 0 S 1045Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1046Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1047Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1048Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1049Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1050 1051 1052# Newfoundland and Labrador 1053 1054# From Paul Eggert (2000-10-02): 1055# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1056# but the only part of Labrador that follows the rules is the 1057# southeast corner, including Port Hope Simpson and Mary's Harbour, 1058# but excluding, say, Black Tickle. 1059 1060# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1061Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1062Rule StJohns 1917 only - Sep 17 2:00 0 S 1063# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1064Rule StJohns 1919 only - May 5 23:00 1:00 D 1065Rule StJohns 1919 only - Aug 12 23:00 0 S 1066# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1067Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1068Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1069# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1070# Pottenger. 1071Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1072Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1073# Whitman gives the following transitions: 1074# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1075# but go with Shanks & Pottenger and assume they used Canadian rules. 1076# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1077# Apr 30 - Sep 24; go with Shanks & Pottenger. 1078Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1079Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1080Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1081Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1082Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1083# From Paul Eggert (2000-10-02): 1084# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1085# at 00:01 local time. For now, assume it started in 1987. 1086Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1087Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1088Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1089Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1090Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1091Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1092# 1093# St John's has an apostrophe, but Posix file names can't have apostrophes. 1094# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1095Zone America/St_Johns -3:30:52 - LMT 1884 1096 -3:30:52 StJohns N%sT 1918 1097 -3:30:52 Canada N%sT 1919 1098 -3:30:52 StJohns N%sT 1935 Mar 30 1099 -3:30 StJohns N%sT 1942 May 11 1100 -3:30 Canada N%sT 1946 1101 -3:30 StJohns N%sT 1102 1103# most of east Labrador 1104 1105# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 1106# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1107Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1108 -3:30:52 - NST 1918 1109 -3:30:52 Canada N%sT 1919 1110 -3:30:52 - NST 1935 Mar 30 1111 -3:30 - NST 1936 1112 -3:30 StJohns N%sT 1942 May 11 1113 -3:30 Canada N%sT 1946 1114 -3:30 StJohns N%sT 1966 Mar 15 2:00 1115 -4:00 StJohns A%sT 1116 1117 1118# west Labrador, Nova Scotia, Prince Edward I 1119 1120# From Paul Eggert (2006-03-22): 1121# Shanks & Pottenger write that since 1970 most of this region has been like 1122# Halifax. Many locales did not observe peacetime DST until 1972; 1123# Glace Bay, NS is the largest that we know of. 1124# Shanks & Pottenger also write that Liverpool, NS was the only town 1125# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1126# this is a typo. 1127 1128# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1129Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1130Rule Halifax 1916 only - Oct 1 0:00 0 S 1131Rule Halifax 1920 only - May 9 0:00 1:00 D 1132Rule Halifax 1920 only - Aug 29 0:00 0 S 1133Rule Halifax 1921 only - May 6 0:00 1:00 D 1134Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1135Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1136Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1137Rule Halifax 1923 only - Sep 4 0:00 0 S 1138Rule Halifax 1924 only - Sep 15 0:00 0 S 1139Rule Halifax 1925 only - Sep 28 0:00 0 S 1140Rule Halifax 1926 only - May 16 0:00 1:00 D 1141Rule Halifax 1926 only - Sep 13 0:00 0 S 1142Rule Halifax 1927 only - May 1 0:00 1:00 D 1143Rule Halifax 1927 only - Sep 26 0:00 0 S 1144Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1145Rule Halifax 1928 only - Sep 9 0:00 0 S 1146Rule Halifax 1929 only - Sep 3 0:00 0 S 1147Rule Halifax 1930 only - Sep 15 0:00 0 S 1148Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1149Rule Halifax 1932 only - May 1 0:00 1:00 D 1150Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1151Rule Halifax 1933 only - Oct 2 0:00 0 S 1152Rule Halifax 1934 only - May 20 0:00 1:00 D 1153Rule Halifax 1934 only - Sep 16 0:00 0 S 1154Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1155Rule Halifax 1935 only - Sep 30 0:00 0 S 1156Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1157Rule Halifax 1936 only - Sep 14 0:00 0 S 1158Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1159Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1160Rule Halifax 1939 only - May 28 0:00 1:00 D 1161Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1162Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1163Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1164Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1165Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1166Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1167Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1168Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1169Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1170# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1171Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1172 -4:00 Halifax A%sT 1918 1173 -4:00 Canada A%sT 1919 1174 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1175 -4:00 Canada A%sT 1946 1176 -4:00 Halifax A%sT 1974 1177 -4:00 Canada A%sT 1178Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1179 -4:00 Canada A%sT 1953 1180 -4:00 Halifax A%sT 1954 1181 -4:00 - AST 1972 1182 -4:00 Halifax A%sT 1974 1183 -4:00 Canada A%sT 1184 1185# New Brunswick 1186 1187# From Paul Eggert (2007-01-31): 1188# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1189# says they changed at 00:01 through 2006, and 1190# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1191# clear that this was the case since at least 1993. 1192# For now, assume it started in 1993. 1193 1194# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1195Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1196Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1197Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1198Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1199Rule Moncton 1939 only - May 27 1:00 1:00 D 1200Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1201Rule Moncton 1940 only - May 19 1:00 1:00 D 1202Rule Moncton 1941 only - May 4 1:00 1:00 D 1203Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1204Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1205Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1206Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1207Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1208# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1209Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1210 -5:00 - EST 1902 Jun 15 1211 -4:00 Canada A%sT 1933 1212 -4:00 Moncton A%sT 1942 1213 -4:00 Canada A%sT 1946 1214 -4:00 Moncton A%sT 1973 1215 -4:00 Canada A%sT 1993 1216 -4:00 Moncton A%sT 2007 1217 -4:00 Canada A%sT 1218 1219# Quebec 1220 1221# From Paul Eggert (2006-07-09): 1222# Shanks & Pottenger write that since 1970 most of Quebec has been 1223# like Montreal. 1224 1225# From Paul Eggert (2006-06-27): 1226# Matthews and Vincent (1998) also write that Quebec east of the -63 1227# meridian is supposed to observe AST, but residents as far east as 1228# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1229# In "Official time in Quebec" the Quebec department of justice writes in 1230# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1231# that "The residents of the Municipality of the 1232# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1233# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1234# written and use Atlantic standard time all year round. The same applies to 1235# the residents of the Native facilities along the lower North Shore." 1236# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1237# says this common practice was codified into law as of 2007. 1238# For lack of better info, guess this practice began around 1970, contra to 1239# Shanks & Pottenger who have this region observing AST/ADT. 1240 1241# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1242Rule Mont 1917 only - Mar 25 2:00 1:00 D 1243Rule Mont 1917 only - Apr 24 0:00 0 S 1244Rule Mont 1919 only - Mar 31 2:30 1:00 D 1245Rule Mont 1919 only - Oct 25 2:30 0 S 1246Rule Mont 1920 only - May 2 2:30 1:00 D 1247Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1248Rule Mont 1921 only - May 1 2:00 1:00 D 1249Rule Mont 1922 only - Apr 30 2:00 1:00 D 1250Rule Mont 1924 only - May 17 2:00 1:00 D 1251Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1252Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1253# The 1927-to-1937 rules can be expressed more simply as 1254# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1255# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1256# The rules below avoid use of 24:00 1257# (which pre-1998 versions of zic cannot handle). 1258Rule Mont 1927 only - May 1 0:00 1:00 D 1259Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1260Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1261Rule Mont 1932 only - May 1 0:00 1:00 D 1262Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1263Rule Mont 1933 only - Oct 1 0:00 0 S 1264Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1265Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1266Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1267Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1268Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1269Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1270 1271# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1272Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1273 -4:00 Canada A%sT 1970 1274 -4:00 - AST 1275Zone America/Montreal -4:54:16 - LMT 1884 1276 -5:00 Mont E%sT 1918 1277 -5:00 Canada E%sT 1919 1278 -5:00 Mont E%sT 1942 Feb 9 2:00s 1279 -5:00 Canada E%sT 1946 1280 -5:00 Mont E%sT 1974 1281 -5:00 Canada E%sT 1282 1283 1284# Ontario 1285 1286# From Paul Eggert (2006-07-09): 1287# Shanks & Pottenger write that since 1970 most of Ontario has been like 1288# Toronto. 1289# Thunder Bay skipped DST in 1973. 1290# Many smaller locales did not observe peacetime DST until 1974; 1291# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1292# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1293 1294# From Mark Brader (2003-07-26): 1295# [According to the Toronto Star] Orillia, Ontario, adopted DST 1296# effective Saturday, 1912-06-22, 22:00; the article mentions that 1297# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1298# have already done so. In Orillia DST was to run until Saturday, 1299# 1912-08-31 (no time mentioned), but it was met with considerable 1300# hostility from certain segments of the public, and was revoked after 1301# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1302# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1303# earlier in June). 1304# 1305# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1306 1307# From Paul Eggert (1997-10-17): 1308# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1309# says that Atikokan, Ontario currently does not observe DST, 1310# but will vote on 11-10 whether to use EST/EDT. 1311# He also writes that the 1312# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1313# Ontario Time Act (1990, Chapter T.9) 1314# </a> 1315# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1316# Officially Atikokan is therefore on CST/CDT, and most likely this report 1317# concerns a non-official time observed as a matter of local practice. 1318# 1319# From Paul Eggert (2000-10-02): 1320# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1321# New Osnaburgh observe CST all year, that Big Trout Lake observes 1322# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1323# violation of the official Ontario rules. 1324# 1325# From Paul Eggert (2006-07-09): 1326# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1327# 2005-07-21 Chronicle-Journal, which said: 1328# 1329# The clocks in Atikokan stay set on standard time year-round. 1330# This means they spend about half the time on central time and 1331# the other half on eastern time. 1332# 1333# For the most part, the system works, Mayor Dennis Brown said. 1334# 1335# "The majority of businesses in Atikokan deal more with Eastern 1336# Canada, but there are some that deal with Western Canada," he 1337# said. "I don't see any changes happening here." 1338# 1339# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1340# [New Osnaburgh] follow the same practice." 1341 1342# From Garry McKinnon (2006-07-14) via Chris Walton: 1343# I chatted with a member of my board who has an outstanding memory 1344# and a long history in Atikokan (and in the telecom industry) and he 1345# can say for certain that Atikokan has been practicing the current 1346# time keeping since 1952, at least. 1347 1348# From Paul Eggert (2006-07-17): 1349# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1350# ever since standard time was introduced, but the information from 1351# McKinnon sounds more authoritative. For now, assume that Atikokan 1352# switched to EST immediately after WWII era daylight saving time 1353# ended. This matches the old (less-populous) America/Coral_Harbour 1354# entry since our cutoff date of 1970, so we can move 1355# America/Coral_Harbour to the 'backward' file. 1356 1357# From Mark Brader (2010-03-06): 1358# 1359# Currently the database has: 1360# 1361# # Ontario 1362# 1363# # From Paul Eggert (2006-07-09): 1364# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1365# # Toronto. 1366# # Thunder Bay skipped DST in 1973. 1367# # Many smaller locales did not observe peacetime DST until 1974; 1368# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1369# 1370# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1371# right corner of page 1, it says that Toronto will return to standard 1372# time at 2 am Sunday morning (which agrees with the database), and that: 1373# 1374# The one-hour setback will go into effect throughout most of Ontario, 1375# except in areas like Windsor which remains on standard time all year. 1376# 1377# Windsor is, of course, a lot larger than Nipigon. 1378# 1379# I only came across this incidentally. I don't know if Windsor began 1380# observing DST when Detroit did, or in 1974, or on some other date. 1381# 1382# By the way, the article continues by noting that: 1383# 1384# Some cities in the United States have pushed the deadline back 1385# three weeks and will change over from daylight saving in October. 1386 1387# From Arthur David Olson (2010-07-17): 1388# 1389# "Standard Time and Time Zones in Canada" appeared in 1390# The Journal of The Royal Astronomical Society of Canada, 1391# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1392# was available at 1393# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1394# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1395# </a> 1396# 1397# It includes the text below (starting on page 57): 1398# 1399# A list of the places in Canada using daylight saving time would 1400# require yearly revision. From information kindly furnished by 1401# the provincial governments and by the postmasters in many cities 1402# and towns, it is found that the following places used daylight sav- 1403# ing in 1930. The information for the province of Quebec is definite, 1404# for the other provinces only approximate: 1405# 1406# Province Daylight saving time used 1407# Prince Edward Island Not used. 1408# Nova Scotia In Halifax only. 1409# New Brunswick In St. John only. 1410# Quebec In the following places: 1411# Montreal Lachine 1412# Quebec Mont-Royal 1413# Levis Iberville 1414# St. Lambert Cap de la Madeleine 1415# Verdun Loretteville 1416# Westmount Richmond 1417# Outremont St. Jerome 1418# Longueuil Greenfield Park 1419# Arvida Waterloo 1420# Chambly-Canton Beaulieu 1421# Melbourne La Tuque 1422# St. Theophile Buckingham 1423# Ontario Used generally in the cities and towns along 1424# the southerly part of the province. Not 1425# used in the northwesterlhy part. 1426# Manitoba Not used. 1427# Saskatchewan In Regina only. 1428# Alberta Not used. 1429# British Columbia Not used. 1430# 1431# With some exceptions, the use of daylight saving may be said to be limited 1432# to those cities and towns lying between Quebec city and Windsor, Ont. 1433 1434# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1435Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1436Rule Toronto 1919 only - Oct 26 0:00 0 S 1437Rule Toronto 1920 only - May 2 2:00 1:00 D 1438Rule Toronto 1920 only - Sep 26 0:00 0 S 1439Rule Toronto 1921 only - May 15 2:00 1:00 D 1440Rule Toronto 1921 only - Sep 15 2:00 0 S 1441Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1442# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1443# was meant. 1444Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1445Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1446# The 1927-to-1939 rules can be expressed more simply as 1447# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1448# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1449# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1450# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1451# The rules below avoid use of Sun>=25 1452# (which pre-2004 versions of zic cannot handle). 1453Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1454Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1455Rule Toronto 1932 only - May 1 2:00 1:00 D 1456Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1457Rule Toronto 1933 only - Oct 1 2:00 0 S 1458Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1459Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1460Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1461Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1462Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1463Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1464Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1465Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1466Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1467# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1468# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1469# is wrong, and that he had confirmed it by checking the 1971-10-30 1470# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1471Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1472 1473# From Paul Eggert (2003-07-27): 1474# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1475# Port Arthur, Ontario, the principle of the Bill has been in 1476# operation for the past three years, and in the City of Moose Jaw, 1477# Saskatchewan, for one year." 1478 1479# From David Bryan via Tory Tronrud, Director/Curator, 1480# Thunder Bay Museum (2003-11-12): 1481# There is some suggestion, however, that, by-law or not, daylight 1482# savings time was being practiced in Fort William and Port Arthur 1483# before 1909.... [I]n 1910, the line between the Eastern and Central 1484# Time Zones was permanently moved about two hundred miles west to 1485# include the Thunder Bay area.... When Canada adopted daylight 1486# savings time in 1916, Fort William and Port Arthur, having done so 1487# already, did not change their clocks.... During the Second World 1488# War,... [t]he cities agreed to implement DST during the summer 1489# months for the remainder of the war years. 1490 1491# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1492Zone America/Toronto -5:17:32 - LMT 1895 1493 -5:00 Canada E%sT 1919 1494 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1495 -5:00 Canada E%sT 1946 1496 -5:00 Toronto E%sT 1974 1497 -5:00 Canada E%sT 1498Zone America/Thunder_Bay -5:57:00 - LMT 1895 1499 -6:00 - CST 1910 1500 -5:00 - EST 1942 1501 -5:00 Canada E%sT 1970 1502 -5:00 Mont E%sT 1973 1503 -5:00 - EST 1974 1504 -5:00 Canada E%sT 1505Zone America/Nipigon -5:53:04 - LMT 1895 1506 -5:00 Canada E%sT 1940 Sep 29 1507 -5:00 1:00 EDT 1942 Feb 9 2:00s 1508 -5:00 Canada E%sT 1509Zone America/Rainy_River -6:18:16 - LMT 1895 1510 -6:00 Canada C%sT 1940 Sep 29 1511 -6:00 1:00 CDT 1942 Feb 9 2:00s 1512 -6:00 Canada C%sT 1513Zone America/Atikokan -6:06:28 - LMT 1895 1514 -6:00 Canada C%sT 1940 Sep 29 1515 -6:00 1:00 CDT 1942 Feb 9 2:00s 1516 -6:00 Canada C%sT 1945 Sep 30 2:00 1517 -5:00 - EST 1518 1519 1520# Manitoba 1521 1522# From Rob Douglas (2006-04-06): 1523# the old Manitoba Time Act - as amended by Bill 2, assented to 1524# March 27, 1987 ... said ... 1525# "between two o'clock Central Standard Time in the morning of 1526# the first Sunday of April of each year and two o'clock Central 1527# Standard Time in the morning of the last Sunday of October next 1528# following, one hour in advance of Central Standard Time."... 1529# I believe that the English legislation [of the old time act] had = 1530# been assented to (March 22, 1967).... 1531# Also, as far as I can tell, there was no order-in-council varying 1532# the time of Daylight Saving Time for 2005 and so the provisions of 1533# the 1987 version would apply - the changeover was at 2:00 Central 1534# Standard Time (i.e. not until 3:00 Central Daylight Time). 1535 1536# From Paul Eggert (2006-04-10): 1537# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1538# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1539# it was also 02:00s in 1966. 1540 1541# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1542Rule Winn 1916 only - Apr 23 0:00 1:00 D 1543Rule Winn 1916 only - Sep 17 0:00 0 S 1544Rule Winn 1918 only - Apr 14 2:00 1:00 D 1545Rule Winn 1918 only - Oct 31 2:00 0 S 1546Rule Winn 1937 only - May 16 2:00 1:00 D 1547Rule Winn 1937 only - Sep 26 2:00 0 S 1548Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1549Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1550Rule Winn 1945 only - Sep lastSun 2:00 0 S 1551Rule Winn 1946 only - May 12 2:00 1:00 D 1552Rule Winn 1946 only - Oct 13 2:00 0 S 1553Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1554Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1555Rule Winn 1950 only - May 1 2:00 1:00 D 1556Rule Winn 1950 only - Sep 30 2:00 0 S 1557Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1558Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1559Rule Winn 1959 only - Oct lastSun 2:00 0 S 1560Rule Winn 1960 only - Sep lastSun 2:00 0 S 1561Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1562Rule Winn 1963 only - Sep 22 2:00 0 S 1563Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1564Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1565Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1566# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1567Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1568 -6:00 Winn C%sT 2006 1569 -6:00 Canada C%sT 1570 1571 1572# Saskatchewan 1573 1574# From Mark Brader (2003-07-26): 1575# The first actual adoption of DST in Canada was at the municipal 1576# level. As the [Toronto] Star put it (1912-06-07), "While people 1577# elsewhere have long been talking of legislation to save daylight, 1578# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1579# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1580# presumably late evening, as below), and would run until "the end of 1581# the summer". The discrepancy between municipal time and railroad 1582# time was noted. 1583 1584# From Paul Eggert (2003-07-27): 1585# Willett (1914-03) notes that DST "has been in operation ... in the 1586# City of Moose Jaw, Saskatchewan, for one year." 1587 1588# From Paul Eggert (2006-03-22): 1589# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1590# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1591# Other western towns (e.g. Lloydminster) are like Edmonton. 1592# Matthews and Vincent (1998) write that Denare Beach and Creighton 1593# are like Winnipeg, in violation of Saskatchewan law. 1594 1595# From W. Jones (1992-11-06): 1596# The. . .below is based on information I got from our law library, the 1597# provincial archives, and the provincial Community Services department. 1598# A precise history would require digging through newspaper archives, and 1599# since you didn't say what you wanted, I didn't bother. 1600# 1601# Saskatchewan is split by a time zone meridian (105W) and over the years 1602# the boundary became pretty ragged as communities near it reevaluated 1603# their affiliations in one direction or the other. In 1965 a provincial 1604# referendum favoured legislating common time practices. 1605# 1606# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1607# Saskatchewan 1978) was proclaimed, and established that the eastern 1608# part of Saskatchewan would use CST year round, that districts in 1609# northwest Saskatchewan would by default follow CST but could opt to 1610# follow Mountain Time rules (thus 1 hour difference in the winter and 1611# zero in the summer), and that districts in southwest Saskatchewan would 1612# by default follow MT but could opt to follow CST. 1613# 1614# It took a few years for the dust to settle (I know one story of a town 1615# on one time zone having its school in another, such that a mom had to 1616# serve her family lunch in two shifts), but presently it seems that only 1617# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1618# rules any more; all other districts appear to have used CST year round 1619# since sometime in the 1960s. 1620 1621# From Chris Walton (2006-06-26): 1622# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1623# long and rather painful to read. 1624# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1625 1626# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1627Rule Regina 1918 only - Apr 14 2:00 1:00 D 1628Rule Regina 1918 only - Oct 31 2:00 0 S 1629Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1630Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1631Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1632Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1633Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1634Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1635Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1636Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1637Rule Regina 1945 only - Sep lastSun 2:00 0 S 1638Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1639Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1640Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1641Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1642Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1643Rule Regina 1959 only - Oct lastSun 2:00 0 S 1644# 1645Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1646Rule Swift 1957 only - Oct lastSun 2:00 0 S 1647Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1648Rule Swift 1959 only - Oct lastSun 2:00 0 S 1649Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1650# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1651Zone America/Regina -6:58:36 - LMT 1905 Sep 1652 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1653 -6:00 - CST 1654Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1655 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1656 -7:00 Regina M%sT 1950 1657 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1658 -6:00 - CST 1659 1660 1661# Alberta 1662 1663# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1664Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1665Rule Edm 1918 only - Oct 31 2:00 0 S 1666Rule Edm 1919 only - May 27 2:00 0 S 1667Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1668Rule Edm 1920 only - Oct lastSun 2:00 0 S 1669Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1670Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1671Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1672Rule Edm 1945 only - Sep lastSun 2:00 0 S 1673Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1674Rule Edm 1947 only - Sep lastSun 2:00 0 S 1675Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1676Rule Edm 1967 only - Oct lastSun 2:00 0 S 1677Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1678Rule Edm 1969 only - Oct lastSun 2:00 0 S 1679Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1680Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1681# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1682Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1683 -7:00 Edm M%sT 1987 1684 -7:00 Canada M%sT 1685 1686 1687# British Columbia 1688 1689# From Paul Eggert (2006-03-22): 1690# Shanks & Pottenger write that since 1970 most of this region has 1691# been like Vancouver. 1692# Dawson Creek uses MST. Much of east BC is like Edmonton. 1693# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1694 1695# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1696Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1697Rule Vanc 1918 only - Oct 31 2:00 0 S 1698Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1699Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1700Rule Vanc 1945 only - Sep 30 2:00 0 S 1701Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1702Rule Vanc 1946 only - Oct 13 2:00 0 S 1703Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1704Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1705# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1706Zone America/Vancouver -8:12:28 - LMT 1884 1707 -8:00 Vanc P%sT 1987 1708 -8:00 Canada P%sT 1709Zone America/Dawson_Creek -8:00:56 - LMT 1884 1710 -8:00 Canada P%sT 1947 1711 -8:00 Vanc P%sT 1972 Aug 30 2:00 1712 -7:00 - MST 1713 1714 1715# Northwest Territories, Nunavut, Yukon 1716 1717# From Paul Eggert (2006-03-22): 1718# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1719# Mathew Englander (1996-10-07) gives the following refs: 1720# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1721# c. 7 defines Yukon standard time as UTC-9. This is still valid; 1722# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1723# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1724# * O.I.C. 1980/02 established DST. 1725# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1726# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1727# with Englander. 1728# From Chris Walton (2006-06-26): 1729# Here is a link to the old daylight saving portion of the interpretation 1730# act which was last updated in 1987: 1731# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1732 1733# From Rives McDow (1999-09-04): 1734# Nunavut ... moved ... to incorporate the whole territory into one time zone. 1735# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1736# Nunavut moves to single time zone Oct. 31 1737# </a> 1738# 1739# From Antoine Leca (1999-09-06): 1740# We then need to create a new timezone for the Kitikmeot region of Nunavut 1741# to differentiate it from the Yellowknife region. 1742 1743# From Paul Eggert (1999-09-20): 1744# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1745# Basic Facts: The New Territory 1746# </a> (1999) reports that Pangnirtung operates on eastern time, 1747# and that Coral Harbour does not observe DST. We don't know when 1748# Pangnirtung switched to eastern time; we'll guess 1995. 1749 1750# From Rives McDow (1999-11-08): 1751# On October 31, when the rest of Nunavut went to Central time, 1752# Pangnirtung wobbled. Here is the result of their wobble: 1753# 1754# The following businesses and organizations in Pangnirtung use Central Time: 1755# 1756# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1757# Eastern Arctic National Parks, A & D Specialist 1758# 1759# The following businesses and organizations in Pangnirtung use Eastern Time: 1760# 1761# Hamlet office, All other businesses, Both schools, Airport operator 1762# 1763# This has made for an interesting situation there, which warranted the news. 1764# No one there that I spoke with seems concerned, or has plans to 1765# change the local methods of keeping time, as it evidently does not 1766# really interfere with any activities or make things difficult locally. 1767# They plan to celebrate New Year's turn-over twice, one hour apart, 1768# so it appears that the situation will last at least that long. 1769# The Nunavut Intergovernmental Affairs hopes that they will "come to 1770# their senses", but the locals evidently don't see any problem with 1771# the current state of affairs. 1772 1773# From Michaela Rodrigue, writing in the 1774# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1775# Nunatsiaq News (1999-11-19)</a>: 1776# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1777# central - or Nunavut time - for government offices, and eastern time 1778# for municipal offices and schools.... Igloolik [was similar but then] 1779# made the switch to central time on Saturday, Nov. 6. 1780 1781# From Paul Eggert (2000-10-02): 1782# Matthews and Vincent (1998) say the following, but we lack histories 1783# for these potential new Zones. 1784# 1785# The Canadian Forces station at Alert uses Eastern Time while the 1786# handful of residents at the Eureka weather station [in the Central 1787# zone] skip daylight savings. Baffin Island, which is crossed by the 1788# Central, Eastern and Atlantic Time zones only uses Eastern Time. 1789# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1790# Central Time and Southampton Island [in the Central zone] is not 1791# required to use daylight savings. 1792 1793# From 1794# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 1795# Nunavut now has two time zones 1796# </a> (2000-11-10): 1797# The Nunavut government would allow its employees in Kugluktuk and 1798# Cambridge Bay to operate on central time year-round, putting them 1799# one hour behind the rest of Nunavut for six months during the winter. 1800# At the end of October the two communities had rebelled against 1801# Nunavut's unified time zone, refusing to shift to eastern time with 1802# the rest of the territory for the winter. Cambridge Bay remained on 1803# central time, while Kugluktuk, even farther west, reverted to 1804# mountain time, which they had used before the advent of Nunavut's 1805# unified time zone in 1999. 1806# 1807# From Rives McDow (2001-01-20), quoting the Nunavut government: 1808# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1809 1810# From Paul Eggert (2000-12-04): 1811# Let's just keep track of the official times for now. 1812 1813# From Rives McDow (2001-03-07): 1814# The premier of Nunavut has issued a ministerial statement advising 1815# that effective 2001-04-01, the territory of Nunavut will revert 1816# back to three time zones (mountain, central, and eastern). Of the 1817# cities in Nunavut, Coral Harbor is the only one that I know of that 1818# has said it will not observe dst, staying on EST year round. I'm 1819# checking for more info, and will get back to you if I come up with 1820# more. 1821# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 1822 1823# From Gwillim Law (2005-05-21): 1824# According to maps at 1825# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1826# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1827# (both dated 2003), and 1828# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1829# (from a 1998 Canadian Geographic article), the de facto and de jure time 1830# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1831# round. Using Google, it's easy to find other websites that confirm this. 1832# I wasn't able to find how far back this time regimen goes, but since it 1833# predates the creation of Nunavut, it probably goes back many years.... 1834# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1835# 1836# From Paul Eggert (2005-07-26): 1837# For lack of better information, assume that Southampton Island observed 1838# daylight saving only during wartime. 1839 1840# From Chris Walton (2007-03-01): 1841# ... the community of Resolute (located on Cornwallis Island in 1842# Nunavut) moved from Central Time to Eastern Time last November. 1843# Basically the community did not change its clocks at the end of 1844# daylight saving.... 1845# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1846 1847# From Chris Walton (2007-03-14): 1848# Today I phoned the "hamlet office" to find out what Resolute was doing with 1849# its clocks. 1850# 1851# The individual that answered the phone confirmed that the clocks did not 1852# move at the end of daylight saving on October 29/2006. He also told me that 1853# the clocks did not move this past weekend (March 11/2007).... 1854 1855# From Chris Walton (2008-11-13): 1856# ...the residents of Resolute believe that they are changing "time zones" 1857# twice a year. In winter months, local time is qualified with "Eastern 1858# Time" which is really "Eastern Standard Time (UTC-5)". In summer 1859# months, local time is qualified with "Central Time" which is really 1860# "Central Daylight Time (UTC-5)"... 1861 1862# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1863Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 1864Rule NT_YK 1918 only - Oct 27 2:00 0 S 1865Rule NT_YK 1919 only - May 25 2:00 1:00 D 1866Rule NT_YK 1919 only - Nov 1 0:00 0 S 1867Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1868Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 1869Rule NT_YK 1945 only - Sep 30 2:00 0 S 1870Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 1871Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 1872Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1873Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1874Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 1875# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1876# aka Panniqtuuq 1877Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 1878 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 1879 -5:00 Canada E%sT 1999 Oct 31 2:00 1880 -6:00 Canada C%sT 2000 Oct 29 2:00 1881 -5:00 Canada E%sT 1882# formerly Frobisher Bay 1883Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 1884 -5:00 NT_YK E%sT 1999 Oct 31 2:00 1885 -6:00 Canada C%sT 2000 Oct 29 2:00 1886 -5:00 Canada E%sT 1887# aka Qausuittuq 1888# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1889Rule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1890Rule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1891Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 1892 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1893 -5:00 - EST 2001 Apr 1 3:00 1894 -6:00 Canada C%sT 2006 Oct 29 2:00 1895 -5:00 Resolute %sT 1896# aka Kangiqiniq 1897Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1898 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1899 -5:00 - EST 2001 Apr 1 3:00 1900 -6:00 Canada C%sT 1901# aka Iqaluktuuttiaq 1902Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 1903 -7:00 NT_YK M%sT 1999 Oct 31 2:00 1904 -6:00 Canada C%sT 2000 Oct 29 2:00 1905 -5:00 - EST 2000 Nov 5 0:00 1906 -6:00 - CST 2001 Apr 1 3:00 1907 -7:00 Canada M%sT 1908Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1909 -7:00 NT_YK M%sT 1980 1910 -7:00 Canada M%sT 1911Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 1912 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1913 -7:00 NT_YK M%sT 1980 1914 -7:00 Canada M%sT 1915Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 1916 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1917 -8:00 NT_YK P%sT 1980 1918 -8:00 Canada P%sT 1919Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 1920 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1921 -8:00 NT_YK P%sT 1980 1922 -8:00 Canada P%sT 1923 1924 1925############################################################################### 1926 1927# Mexico 1928 1929# From Paul Eggert (2001-03-05): 1930# The Investigation and Analysis Service of the 1931# Mexican Library of Congress (MLoC) has published a 1932# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 1933# history of Mexican local time (in Spanish) 1934# </a>. 1935# 1936# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 1937# (In all cases we go with the MLoC.) 1938# S&P report that Baja was at -8:00 in 1922/1923. 1939# S&P say the 1930 transition in Baja was 1930-11-16. 1940# S&P report no DST during summer 1931. 1941# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 1942 1943# From Gwillim Law (2001-02-20): 1944# There are some other discrepancies between the Decrees page and the 1945# tz database. I think they can best be explained by supposing that 1946# the researchers who prepared the Decrees page failed to find some of 1947# the relevant documents. 1948 1949# From Alan Perry (1996-02-15): 1950# A guy from our Mexico subsidiary finally found the Presidential Decree 1951# outlining the timezone changes in Mexico. 1952# 1953# ------------- Begin Forwarded Message ------------- 1954# 1955# I finally got my hands on the Official Presidential Decree that sets up the 1956# rules for the DST changes. The rules are: 1957# 1958# 1. The country is divided in 3 timezones: 1959# - Baja California Norte (the Mexico/BajaNorte TZ) 1960# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 1961# - The rest of the country (the Mexico/General TZ) 1962# 1963# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 1964# at 2:00 AM, the times in each zone are as follows: 1965# BajaNorte: GMT+7 1966# BajaSur: GMT+6 1967# General: GMT+5 1968# 1969# 3. The rest of the year, the times are as follows: 1970# BajaNorte: GMT+8 1971# BajaSur: GMT+7 1972# General: GMT+6 1973# 1974# The Decree was published in Mexico's Official Newspaper on January 4th. 1975# 1976# -------------- End Forwarded Message -------------- 1977# From Paul Eggert (1996-06-12): 1978# For an English translation of the decree, see 1979# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 1980# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 1981# </a> 1982 1983# From Rives McDow (1998-10-08): 1984# The State of Quintana Roo has reverted back to central STD and DST times 1985# (i.e. UTC -0600 and -0500 as of 1998-08-02). 1986 1987# From Rives McDow (2000-01-10): 1988# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 1989# zone 5 hours from the International Date Line, and will not observe daylight 1990# savings time so as to stay on the same time zone as the southern part of 1991# Arizona year round. 1992 1993# From Jesper Norgaard, translating 1994# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 1995# In Oaxaca, the 55.000 teachers from the Section 22 of the National 1996# Syndicate of Education Workers, refuse to apply daylight saving each 1997# year, so that the more than 10,000 schools work at normal hour the 1998# whole year. 1999 2000# From Gwillim Law (2001-01-19): 2001# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2002# (translated):... 2003# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2004# that Summer Time will be reduced from seven to five months, starting 2005# this year.... 2006# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 2007# [translated], says "summer time will ... take effect on the first Sunday 2008# in May, and end on the last Sunday of September. 2009 2010# From Arthur David Olson (2001-01-25): 2011# The 2001-01-24 traditional Washington Post contained the page one 2012# story "Timely Issue Divides Mexicans."... 2013# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2014# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 2015# Mexico City and its 20 million residents on a different time than 2016# the rest of the country..." In particular, Lopez Obrador would abolish 2017# observation of Daylight Saving Time. 2018 2019# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 2020# Official statute published by the Energy Department 2021# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2022# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 2023 2024# From Paul Eggert (2001-03-03): 2025# 2026# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 2027# James F. Smith writes in today's LA Times 2028# </a> 2029# * Sonora will continue to observe standard time. 2030# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 2031# the Federal District will not adopt DST. 2032# * 4 of 16 district leaders announced they'll ignore the decree. 2033# * The decree does not affect federal-controlled facilities including 2034# the airport, banks, hospitals, and schools. 2035# 2036# For now we'll assume that the Federal District will bow to federal rules. 2037 2038# From Jesper Norgaard (2001-04-01): 2039# I found some references to the Mexican application of daylight 2040# saving, which modifies what I had already sent you, stating earlier 2041# that a number of northern Mexican states would go on daylight 2042# saving. The modification reverts this to only cover Baja California 2043# (Norte), while all other states (except Sonora, who has no daylight 2044# saving all year) will follow the original decree of president 2045# Vicente Fox, starting daylight saving May 6, 2001 and ending 2046# September 30, 2001. 2047# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 2048# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2049 2050# From Reuters (2001-09-04): 2051# Mexico's Supreme Court on Tuesday declared that daylight savings was 2052# unconstitutional in Mexico City, creating the possibility the 2053# capital will be in a different time zone from the rest of the nation 2054# next year.... The Supreme Court's ruling takes effect at 2:00 2055# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2056# standard time. "This is so residents of the Federal District are not 2057# subject to unexpected time changes," a statement from the court said. 2058 2059# From Jesper Norgaard Welen (2002-03-12): 2060# ... consulting my local grocery store(!) and my coworkers, they all insisted 2061# that a new decision had been made to reinstate US style DST in Mexico.... 2062# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2063# confirms this. Sonora as usual is the only state where DST is not applied. 2064 2065# From Steffen Thorsen (2009-12-28): 2066# 2067# Steffen Thorsen wrote: 2068# > Mexico's House of Representatives has approved a proposal for northern 2069# > Mexico's border cities to share the same daylight saving schedule as 2070# > the United States. 2071# Now this has passed both the Congress and the Senate, so starting from 2072# 2010, some border regions will be the same: 2073# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2074# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2075# </a> 2076# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2077# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2078# </a> 2079# (Spanish) 2080# 2081# Could not find the new law text, but the proposed law text changes are here: 2082# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2083# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2084# </a> 2085# (Gaceta Parlamentaria) 2086# 2087# There is also a list of the votes here: 2088# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2089# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2090# </a> 2091# 2092# Our page: 2093# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2094# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2095# </a> 2096 2097# From Arthur David Olson (2010-01-20): 2098# The page 2099# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2100# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2101# </a> 2102# includes this text: 2103# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2104# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2105# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2106# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2107# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2108# horas del primer domingo de noviembre. 2109# En los municipios fronterizos que se encuentren ubicados en la franja 2110# fronteriza norte en el territorio comprendido entre la línea 2111# internacional y la línea paralela ubicada a una distancia de veinte 2112# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2113# interior del país, la aplicación de este horario estacional surtirá 2114# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2115# las dos horas del primer domingo de noviembre. 2116 2117# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2118Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2119Rule Mexico 1939 only - Jun 25 0:00 0 S 2120Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2121Rule Mexico 1941 only - Apr 1 0:00 0 S 2122Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2123Rule Mexico 1944 only - May 1 0:00 0 S 2124Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2125Rule Mexico 1950 only - Jul 30 0:00 0 S 2126Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2127Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2128Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2129Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2130Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2131Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2132# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2133# Quintana Roo 2134Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2135 -6:00 - CST 1981 Dec 23 2136 -5:00 Mexico E%sT 1998 Aug 2 2:00 2137 -6:00 Mexico C%sT 2138# Campeche, Yucatan 2139Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2140 -6:00 - CST 1981 Dec 23 2141 -5:00 - EST 1982 Dec 2 2142 -6:00 Mexico C%sT 2143# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2144Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2145 -6:00 - CST 1988 2146 -6:00 US C%sT 1989 2147 -6:00 Mexico C%sT 2010 2148 -6:00 US C%sT 2149# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 2150Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2151 -6:00 - CST 1988 2152 -6:00 US C%sT 1989 2153 -6:00 Mexico C%sT 2154# Central Mexico 2155Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2156 -7:00 - MST 1927 Jun 10 23:00 2157 -6:00 - CST 1930 Nov 15 2158 -7:00 - MST 1931 May 1 23:00 2159 -6:00 - CST 1931 Oct 2160 -7:00 - MST 1932 Apr 1 2161 -6:00 Mexico C%sT 2001 Sep 30 02:00 2162 -6:00 - CST 2002 Feb 20 2163 -6:00 Mexico C%sT 2164# Chihuahua (near US border) 2165Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2166 -7:00 - MST 1927 Jun 10 23:00 2167 -6:00 - CST 1930 Nov 15 2168 -7:00 - MST 1931 May 1 23:00 2169 -6:00 - CST 1931 Oct 2170 -7:00 - MST 1932 Apr 1 2171 -6:00 - CST 1996 2172 -6:00 Mexico C%sT 1998 2173 -6:00 - CST 1998 Apr Sun>=1 3:00 2174 -7:00 Mexico M%sT 2010 2175 -7:00 US M%sT 2176# Chihuahua (away from US border) 2177Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2178 -7:00 - MST 1927 Jun 10 23:00 2179 -6:00 - CST 1930 Nov 15 2180 -7:00 - MST 1931 May 1 23:00 2181 -6:00 - CST 1931 Oct 2182 -7:00 - MST 1932 Apr 1 2183 -6:00 - CST 1996 2184 -6:00 Mexico C%sT 1998 2185 -6:00 - CST 1998 Apr Sun>=1 3:00 2186 -7:00 Mexico M%sT 2187# Sonora 2188Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2189 -7:00 - MST 1927 Jun 10 23:00 2190 -6:00 - CST 1930 Nov 15 2191 -7:00 - MST 1931 May 1 23:00 2192 -6:00 - CST 1931 Oct 2193 -7:00 - MST 1932 Apr 1 2194 -6:00 - CST 1942 Apr 24 2195 -7:00 - MST 1949 Jan 14 2196 -8:00 - PST 1970 2197 -7:00 Mexico M%sT 1999 2198 -7:00 - MST 2199 2200# From Alexander Krivenyshev (2010-04-21): 2201# According to news, Bahía de Banderas (Mexican state of Nayarit) 2202# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2203# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2204# 2205# (Spanish) 2206# Bahía de Banderas homologa su horario al del centro del 2207# país, a partir de este domingo 2208# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2209# http://www.nayarit.gob.mx/notes.asp?id=20748 2210# </a> 2211# 2212# Bahía de Banderas homologa su horario con el del Centro del 2213# País 2214# <a href="http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50"> 2215# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50" 2216# </a> 2217# 2218# (English) 2219# Puerto Vallarta and Bahía de Banderas: One Time Zone 2220# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2221# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2222# </a> 2223# 2224# or 2225# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2226# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2227# </a> 2228# 2229# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2230# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2231# zone ..." 2232# Baja California Sur, Nayarit, Sinaloa 2233 2234# From Arthur David Olson (2010-05-01): 2235# Use "Bahia_Banderas" to keep the name to fourteen characters. 2236 2237Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2238 -7:00 - MST 1927 Jun 10 23:00 2239 -6:00 - CST 1930 Nov 15 2240 -7:00 - MST 1931 May 1 23:00 2241 -6:00 - CST 1931 Oct 2242 -7:00 - MST 1932 Apr 1 2243 -6:00 - CST 1942 Apr 24 2244 -7:00 - MST 1949 Jan 14 2245 -8:00 - PST 1970 2246 -7:00 Mexico M%sT 2247 2248Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2249 -7:00 - MST 1927 Jun 10 23:00 2250 -6:00 - CST 1930 Nov 15 2251 -7:00 - MST 1931 May 1 23:00 2252 -6:00 - CST 1931 Oct 2253 -7:00 - MST 1932 Apr 1 2254 -6:00 - CST 1942 Apr 24 2255 -7:00 - MST 1949 Jan 14 2256 -8:00 - PST 1970 2257 -7:00 Mexico M%sT 2010 Apr 4 2:00 2258 -6:00 Mexico C%sT 2259 2260# Baja California (near US border) 2261Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2262 -7:00 - MST 1924 2263 -8:00 - PST 1927 Jun 10 23:00 2264 -7:00 - MST 1930 Nov 15 2265 -8:00 - PST 1931 Apr 1 2266 -8:00 1:00 PDT 1931 Sep 30 2267 -8:00 - PST 1942 Apr 24 2268 -8:00 1:00 PWT 1945 Aug 14 23:00u 2269 -8:00 1:00 PPT 1945 Nov 12 # Peace 2270 -8:00 - PST 1948 Apr 5 2271 -8:00 1:00 PDT 1949 Jan 14 2272 -8:00 - PST 1954 2273 -8:00 CA P%sT 1961 2274 -8:00 - PST 1976 2275 -8:00 US P%sT 1996 2276 -8:00 Mexico P%sT 2001 2277 -8:00 US P%sT 2002 Feb 20 2278 -8:00 Mexico P%sT 2010 2279 -8:00 US P%sT 2280# Baja California (away from US border) 2281Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2282 -7:00 - MST 1924 2283 -8:00 - PST 1927 Jun 10 23:00 2284 -7:00 - MST 1930 Nov 15 2285 -8:00 - PST 1931 Apr 1 2286 -8:00 1:00 PDT 1931 Sep 30 2287 -8:00 - PST 1942 Apr 24 2288 -8:00 1:00 PWT 1945 Aug 14 23:00u 2289 -8:00 1:00 PPT 1945 Nov 12 # Peace 2290 -8:00 - PST 1948 Apr 5 2291 -8:00 1:00 PDT 1949 Jan 14 2292 -8:00 - PST 1954 2293 -8:00 CA P%sT 1961 2294 -8:00 - PST 1976 2295 -8:00 US P%sT 1996 2296 -8:00 Mexico P%sT 2001 2297 -8:00 US P%sT 2002 Feb 20 2298 -8:00 Mexico P%sT 2299# From Paul Eggert (2006-03-22): 2300# Formerly there was an America/Ensenada zone, which differed from 2301# America/Tijuana only in that it did not observe DST from 1976 2302# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2303# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2304# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2305# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2306# DST-observance was a town-by-town matter back then. This concerns 2307# data after 1970 so most likely there should be at least one Zone 2308# other than America/Tijuana for Baja, but it's not clear yet what its 2309# name or contents should be. 2310# 2311# Revillagigedo Is 2312# no information 2313 2314############################################################################### 2315 2316# Anguilla 2317# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2318Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 2319 -4:00 - AST 2320 2321# Antigua and Barbuda 2322# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2323Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2324 -5:00 - EST 1951 2325 -4:00 - AST 2326 2327# Bahamas 2328# 2329# From Sue Williams (2006-12-07): 2330# The Bahamas announced about a month ago that they plan to change their DST 2331# rules to sync with the U.S. starting in 2007.... 2332# http://www.jonesbahamas.com/?c=45&a=10412 2333 2334# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2335Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2336Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2337# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2338Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 2339 -5:00 Bahamas E%sT 1976 2340 -5:00 US E%sT 2341 2342# Barbados 2343# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2344Rule Barb 1977 only - Jun 12 2:00 1:00 D 2345Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2346Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2347Rule Barb 1979 only - Sep 30 2:00 0 S 2348Rule Barb 1980 only - Sep 25 2:00 0 S 2349# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2350Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 2351 -3:58:28 - BMT 1932 # Bridgetown Mean Time 2352 -4:00 Barb A%sT 2353 2354# Belize 2355# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2356# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2357Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2358Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2359Rule Belize 1973 only - Dec 5 0:00 1:00 D 2360Rule Belize 1974 only - Feb 9 0:00 0 S 2361Rule Belize 1982 only - Dec 18 0:00 1:00 D 2362Rule Belize 1983 only - Feb 12 0:00 0 S 2363# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2364Zone America/Belize -5:52:48 - LMT 1912 Apr 2365 -6:00 Belize C%sT 2366 2367# Bermuda 2368 2369# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2370 2371# Next year, however, clocks in the US will go forward on the second Sunday 2372# in March, until the first Sunday in November. And, after the Time Zone 2373# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2374# Friday, the same thing will happen in Bermuda. 2375# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2376 2377# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2378Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 2379 -4:00 - AST 1974 Apr 28 2:00 2380 -4:00 Bahamas A%sT 1976 2381 -4:00 US A%sT 2382 2383# Cayman Is 2384# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2385Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2386 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2387 -5:00 - EST 2388 2389# Costa Rica 2390# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2391Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2392Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2393Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2394# IATA SSIM (1991-09) says the following was at 1:00; 2395# go with Shanks & Pottenger. 2396Rule CR 1991 only - Jul 1 0:00 0 S 2397Rule CR 1992 only - Mar 15 0:00 0 S 2398# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 2399# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2400Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 2401 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 2402 -6:00 CR C%sT 2403# Coco 2404# no information; probably like America/Costa_Rica 2405 2406# Cuba 2407 2408# From Arthur David Olson (1999-03-29): 2409# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2410# the Cuban National Team and the Baltimore Orioles was carried live on 2411# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2412# During the game, play-by-play announcer Jim Hunter noted that 2413# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2414# Time today." (The "two hour" remark referred to losing one hour of 2415# sleep on 1999-03-28--when the announcers were in Cuba as it switched 2416# to DST--and one more hour on 1999-04-04--when the announcers will have 2417# returned to Baltimore, which switches on that date.) 2418 2419# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2420# Cuba is not going back to standard time this year. 2421# From Paul Eggert (2006-03-22): 2422# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2423# says that it's due to a problem at the Antonio Guiteras 2424# thermoelectric plant, and says "This October there will be no return 2425# to normal hours (after daylight saving time)". 2426# For now, let's assume that it's a temporary measure. 2427 2428# From Carlos A. Carnero Delgado (2005-11-12): 2429# This year (just like in 2004-2005) there's no change in time zone 2430# adjustment in Cuba. We will stay in daylight saving time: 2431# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2432 2433# From Jesper Norgaard Welen (2006-10-21): 2434# An article in GRANMA INTERNACIONAL claims that Cuba will end 2435# the 3 years of permanent DST next weekend, see 2436# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2437# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2438# watches should be set back one hour -- going back to 00:00 hours -- returning 2439# to the normal schedule.... 2440 2441# From Paul Eggert (2007-03-02): 2442# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2443# says Cuban clocks will advance at midnight on March 10. 2444# For lack of better information, assume Cuba will use US rules, 2445# except that it switches at midnight standard time as usual. 2446# 2447# From Steffen Thorsen (2007-10-25): 2448# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2449# earlier - on the last Sunday of October, just like in 2006. 2450# 2451# He supplied these references: 2452# 2453# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2454# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2455# 2456# From Alex Kryvenishev (2007-10-25): 2457# Here is also article from Granma (Cuba): 2458# 2459# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2460# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2461# 2462# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2463 2464# From Arthur David Olson (2008-03-09): 2465# I'm in Maryland which is now observing United States Eastern Daylight 2466# Time. At 9:44 local time I used RealPlayer to listen to 2467# <a href="http://media.enet.cu/radioreloj"> 2468# http://media.enet.cu/radioreloj 2469# </a>, a Cuban information station, and heard 2470# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2471# indicating that Cuba is still on standard time. 2472 2473# From Steffen Thorsen (2008-03-12): 2474# It seems that Cuba will start DST on Sunday, 2007-03-16... 2475# It was announced yesterday, according to this source (in Spanish): 2476# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2477# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2478# </a> 2479# 2480# Some more background information is posted here: 2481# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2482# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2483# </a> 2484# 2485# The article also says that Cuba has been observing DST since 1963, 2486# while Shanks (and tzdata) has 1965 as the first date (except in the 2487# 1940's). Many other web pages in Cuba also claim that it has been 2488# observed since 1963, but with the exception of 1970 - an exception 2489# which is not present in tzdata/Shanks. So there is a chance we need to 2490# change some historic records as well. 2491# 2492# One example: 2493# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2494# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2495# </a> 2496 2497# From Jesper Norgaard Welen (2008-03-13): 2498# The Cuban time change has just been confirmed on the most authoritative 2499# web site, the Granma. Please check out 2500# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2501# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2502# </a> 2503# 2504# Basically as expected after Steffen Thorsens information, the change 2505# will take place midnight between Saturday and Sunday. 2506 2507# From Arthur David Olson (2008-03-12): 2508# Assume Sun>=15 (third Sunday) going forward. 2509 2510# From Alexander Krivenyshev (2009-03-04) 2511# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2512# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2513# not on midnight March 14 / March 15 as previously thought. 2514# 2515# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2516# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2517# (in Spanish) 2518# </a> 2519 2520# From Arthur David Olson (2009-03-09) 2521# I listened over the Internet to 2522# <a href="http://media.enet.cu/readioreloj"> 2523# http://media.enet.cu/readioreloj 2524# </a> 2525# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2526# the time was announced as "diez cinco"--the same time as here, indicating 2527# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2528 2529# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2530Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2531Rule Cuba 1928 only - Oct 10 0:00 0 S 2532Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2533Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2534Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2535Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2536Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2537Rule Cuba 1965 only - Sep 30 0:00 0 S 2538Rule Cuba 1966 only - May 29 0:00 1:00 D 2539Rule Cuba 1966 only - Oct 2 0:00 0 S 2540Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2541Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2542Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2543Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2544Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2545Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2546Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2547Rule Cuba 1978 only - May 7 0:00 1:00 D 2548Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2549Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2550Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2551Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2552Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2553Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2554Rule Cuba 1996 only - Oct 6 0:00s 0 S 2555Rule Cuba 1997 only - Oct 12 0:00s 0 S 2556Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2557Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2558Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2559Rule Cuba 2006 max - Oct lastSun 0:00s 0 S 2560Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2561Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2562Rule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D 2563 2564# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2565Zone America/Havana -5:29:28 - LMT 1890 2566 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2567 -5:00 Cuba C%sT 2568 2569# Dominica 2570# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2571Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 2572 -4:00 - AST 2573 2574# Dominican Republic 2575 2576# From Steffen Thorsen (2000-10-30): 2577# Enrique Morales reported to me that the Dominican Republic has changed the 2578# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2579# http://www.listin.com.do/antes/261000/republica/princi.html 2580 2581# From Paul Eggert (2000-12-04): 2582# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2583 2584# From Rives McDow (2000-12-01): 2585# Dominican Republic changed its mind and presidential decree on Tuesday, 2586# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2587# Dominican Republic will be reverting to 8 hours from the International Date 2588# Line, and will not be using DST in the foreseeable future. The reason they 2589# decided to use DST was to be in synch with Puerto Rico, who was also going 2590# to implement DST. When Puerto Rico didn't implement DST, the president 2591# decided to revert. 2592 2593 2594# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2595Rule DR 1966 only - Oct 30 0:00 1:00 D 2596Rule DR 1967 only - Feb 28 0:00 0 S 2597Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2598Rule DR 1970 only - Feb 21 0:00 0 S 2599Rule DR 1971 only - Jan 20 0:00 0 S 2600Rule DR 1972 1974 - Jan 21 0:00 0 S 2601# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2602Zone America/Santo_Domingo -4:39:36 - LMT 1890 2603 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2604 -5:00 DR E%sT 1974 Oct 27 2605 -4:00 - AST 2000 Oct 29 02:00 2606 -5:00 US E%sT 2000 Dec 3 01:00 2607 -4:00 - AST 2608 2609# El Salvador 2610 2611# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2612Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2613Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2614# There are too many San Salvadors elsewhere, so use America/El_Salvador 2615# instead of America/San_Salvador. 2616# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2617Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2618 -6:00 Salv C%sT 2619 2620# Grenada 2621# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2622Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 2623 -4:00 - AST 2624 2625# Guadeloupe 2626# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2627Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 2628 -4:00 - AST 2629# St Barthelemy 2630Link America/Guadeloupe America/St_Barthelemy 2631# St Martin (French part) 2632Link America/Guadeloupe America/Marigot 2633 2634# Guatemala 2635# 2636# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2637# Diario Co Latino, at 2638# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2639# says in an article dated 2006-04-19 that the Guatemalan government had 2640# decided on that date to advance official time by 60 minutes, to lessen the 2641# impact of the elevated cost of oil.... Daylight saving time will last from 2642# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2643# From Paul Eggert (2006-06-22): 2644# The Ministry of Energy and Mines, press release CP-15/2006 2645# (2006-04-19), says DST ends at 24:00. See 2646# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2647 2648# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2649Rule Guat 1973 only - Nov 25 0:00 1:00 D 2650Rule Guat 1974 only - Feb 24 0:00 0 S 2651Rule Guat 1983 only - May 21 0:00 1:00 D 2652Rule Guat 1983 only - Sep 22 0:00 0 S 2653Rule Guat 1991 only - Mar 23 0:00 1:00 D 2654Rule Guat 1991 only - Sep 7 0:00 0 S 2655Rule Guat 2006 only - Apr 30 0:00 1:00 D 2656Rule Guat 2006 only - Oct 1 0:00 0 S 2657# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2658Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2659 -6:00 Guat C%sT 2660 2661# Haiti 2662# From Gwillim Law (2005-04-15): 2663# Risto O. Nykanen wrote me that Haiti is now on DST. 2664# I searched for confirmation, and I found a 2665# <a href="http://www.haitianconsulate.org/time.doc"> press release 2666# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2667# </a>. Translated from French, it says: 2668# 2669# "The Prime Minister's Communication Office notifies the public in general 2670# and the press in particular that, following a decision of the Interior 2671# Ministry and the Territorial Collectivities [I suppose that means the 2672# provinces], Haiti will move to Eastern Daylight Time in the night from next 2673# Saturday the 2nd to Sunday the 3rd. 2674# 2675# "Consequently, the Prime Minister's Communication Office wishes to inform 2676# the population that the country's clocks will be set forward one hour 2677# starting at midnight. This provision will hold until the last Saturday in 2678# October 2005. 2679# 2680# "Port-au-Prince, March 31, 2005" 2681# 2682# From Steffen Thorsen (2006-04-04): 2683# I have been informed by users that Haiti observes DST this year like 2684# last year, so the current "only" rule for 2005 might be changed to a 2685# "max" rule or to last until 2006. (Who knows if they will observe DST 2686# next year or if they will extend their DST like US/Canada next year). 2687# 2688# I have found this article about it (in French): 2689# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2690# 2691# The reason seems to be an energy crisis. 2692 2693# From Stephen Colebourne (2007-02-22): 2694# Some IATA info: Haiti won't be having DST in 2007. 2695 2696 2697# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2698Rule Haiti 1983 only - May 8 0:00 1:00 D 2699Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 2700Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2701# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2702# Go with IATA. 2703Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 2704Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2705Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2706Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2707# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2708Zone America/Port-au-Prince -4:49:20 - LMT 1890 2709 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 2710 -5:00 Haiti E%sT 2711 2712# Honduras 2713# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2714 2715# From Paul Eggert (2006-05-05): 2716# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2717# saying Honduras will start using DST midnight Saturday, effective 4 2718# months until September. La Tribuna reported today 2719# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2720# of Honduras, refused to back down on this. 2721 2722# From Jesper Norgaard Welen (2006-08-08): 2723# It seems that Honduras has returned from DST to standard time this Monday at 2724# 00:00 hours (prolonging Sunday to 25 hours duration). 2725# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2726 2727# From Paul Eggert (2006-08-08): 2728# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2729# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2730# It mentions executive decree 18-2006. 2731 2732# From Steffen Thorsen (2006-08-17): 2733# Honduras will observe DST from 2007 to 2009, exact dates are not 2734# published, I have located this authoritative source: 2735# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2736 2737# From Steffen Thorsen (2007-03-30): 2738# http://www.laprensahn.com/pais_nota.php?id04962=7386 2739# So it seems that Honduras will not enter DST this year.... 2740 2741# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2742Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2743Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 2744Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 2745Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 2746# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2747Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2748 -6:00 Hond C%sT 2749# 2750# Great Swan I ceded by US to Honduras in 1972 2751 2752# Jamaica 2753 2754# From Bob Devine (1988-01-28): 2755# Follows US rules. 2756 2757# From U. S. Naval Observatory (1989-01-19): 2758# JAMAICA 5 H BEHIND UTC 2759 2760# From Shanks & Pottenger: 2761# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2762Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston 2763 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2764 -5:00 - EST 1974 Apr 28 2:00 2765 -5:00 US E%sT 1984 2766 -5:00 - EST 2767 2768# Martinique 2769# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2770Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 2771 -4:04:20 - FFMT 1911 May # Fort-de-France MT 2772 -4:00 - AST 1980 Apr 6 2773 -4:00 1:00 ADT 1980 Sep 28 2774 -4:00 - AST 2775 2776# Montserrat 2777# From Paul Eggert (2006-03-22): 2778# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2779# world.gazetteer.com says Cork Hill is the most populous location now. 2780# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2781Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 2782 -4:00 - AST 2783 2784# Nicaragua 2785# 2786# This uses Shanks & Pottenger for times before 2005. 2787# 2788# From Steffen Thorsen (2005-04-12): 2789# I've got reports from 8 different people that Nicaragua just started 2790# DST on Sunday 2005-04-10, in order to save energy because of 2791# expensive petroleum. The exact end date for DST is not yet 2792# announced, only "September" but some sites also say "mid-September". 2793# Some background information is available on the President's official site: 2794# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2795# The Decree, no 23-2005 is available here: 2796# 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 2797# 2798# From Paul Eggert (2005-05-01): 2799# The decree doesn't say anything about daylight saving, but for now let's 2800# assume that it is daylight saving.... 2801# 2802# From Gwillim Law (2005-04-21): 2803# The Associated Press story on the time change, which can be found at 2804# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2805# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2806# time that a change of clocks was applied to save energy was in the year 2000 2807# during the Arnoldo Aleman administration."... 2808# The northamerica file says that Nicaragua has been on UTC-6 continuously 2809# since December 1998. I wasn't able to find any details of Nicaraguan time 2810# changes in 2000. Perhaps a note could be added to the northamerica file, to 2811# the effect that we have indirect evidence that DST was observed in 2000. 2812# 2813# From Jesper Norgaard Welen (2005-11-02): 2814# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2815# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2816# (2005-09-26) 2817# 2818# From Jesper Norgaard Welen (2006-05-05): 2819# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2820# (my informal translation) 2821# By order of the president of the republic, Enrique Bolanos, Nicaragua 2822# advanced by sixty minutes their official time, yesterday at 2 in the 2823# morning, and will stay that way until 30.th. of september. 2824# 2825# From Jesper Norgaard Welen (2006-09-30): 2826# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2827# My informal translation runs: 2828# The natural sun time is restored in all the national territory, in that the 2829# time is returned one hour at 01:00 am of October 1 of 2006. 2830# 2831# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2832Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 2833Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2834Rule Nic 2005 only - Apr 10 0:00 1:00 D 2835Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 2836Rule Nic 2006 only - Apr 30 2:00 1:00 D 2837Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 2838# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2839Zone America/Managua -5:45:08 - LMT 1890 2840 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 2841 -6:00 - CST 1973 May 2842 -5:00 - EST 1975 Feb 16 2843 -6:00 Nic C%sT 1992 Jan 1 4:00 2844 -5:00 - EST 1992 Sep 24 2845 -6:00 - CST 1993 2846 -5:00 - EST 1997 2847 -6:00 Nic C%sT 2848 2849# Panama 2850# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2851Zone America/Panama -5:18:08 - LMT 1890 2852 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 2853 -5:00 - EST 2854 2855# Puerto Rico 2856# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 2857# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2858Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 2859 -4:00 - AST 1942 May 3 2860 -4:00 US A%sT 1946 2861 -4:00 - AST 2862 2863# St Kitts-Nevis 2864# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2865Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 2866 -4:00 - AST 2867 2868# St Lucia 2869# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2870Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries 2871 -4:04:00 - CMT 1912 # Castries Mean Time 2872 -4:00 - AST 2873 2874# St Pierre and Miquelon 2875# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 2876# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2877Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 2878 -4:00 - AST 1980 May 2879 -3:00 - PMST 1987 # Pierre & Miquelon Time 2880 -3:00 Canada PM%sT 2881 2882# St Vincent and the Grenadines 2883# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2884Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 2885 -4:04:56 - KMT 1912 # Kingstown Mean Time 2886 -4:00 - AST 2887 2888# Turks and Caicos 2889# 2890# From Chris Dunn in 2891# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2892# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2893# daylight saving dates for time changes have been adjusted to match 2894# the recent U.S. change of dates. 2895# 2896# From Brian Inglis (2007-04-28): 2897# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2898# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2899# rows before that there is an out of date entry for Oct: 2900# "Eastern Standard Times Begins 2007 2901# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2902# indicating that the normal ET rules are followed. 2903# 2904# From Paul Eggert (2006-05-01): 2905# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 2906# says they switch at midnight. Go with Shanks & Pottenger. 2907# 2908# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2909Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 2910Rule TC 1979 2006 - Oct lastSun 2:00 0 S 2911Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 2912Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 2913Rule TC 2007 max - Nov Sun>=1 2:00 0 S 2914# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2915Zone America/Grand_Turk -4:44:32 - LMT 1890 2916 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2917 -5:00 TC E%sT 2918 2919# British Virgin Is 2920# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2921Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 2922 -4:00 - AST 2923 2924# Virgin Is 2925# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2926Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 2927 -4:00 - AST 2928