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# From Josh Findley (2011-01-21): 350# ...it appears that Mercer County, North Dakota, changed from the 351# mountain time zone to the central time zone at the last transition from 352# daylight-saving to standard time (on Nov. 7, 2010): 353# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm"> 354# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 355# </a> 356# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html"> 357# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 358# </a> 359 360# From Andy Lipscomb (2011-01-24): 361# ...according to the Census Bureau, the largest city is Beulah (although 362# it's commonly referred to as Beulah-Hazen, with Hazen being the next 363# largest city in Mercer County). Google Maps places Beulah's city hall 364# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07". 365 366Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 367 -7:00 US M%sT 2010 Nov 7 2:00 368 -6:00 US C%sT 369 370# US mountain time, represented by Denver 371# 372# Colorado, far western Kansas, Montana, western 373# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 374# New Mexico, southwestern North Dakota, 375# western South Dakota, far western Texas (El Paso County, Hudspeth County, 376# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 377# 378# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 379Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 380Rule Denver 1920 only - Oct lastSun 2:00 0 S 381Rule Denver 1921 only - May 22 2:00 0 S 382Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 383Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 384# Zone NAME GMTOFF RULES FORMAT [UNTIL] 385Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 386 -7:00 US M%sT 1920 387 -7:00 Denver M%sT 1942 388 -7:00 US M%sT 1946 389 -7:00 Denver M%sT 1967 390 -7:00 US M%sT 391 392# US Pacific time, represented by Los Angeles 393# 394# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 395# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 396# and the northern three-quarters of Idaho county), 397# most of Nevada, most of Oregon, and Washington 398# 399# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 400Rule CA 1948 only - Mar 14 2:00 1:00 D 401Rule CA 1949 only - Jan 1 2:00 0 S 402Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 403Rule CA 1950 1961 - Sep lastSun 2:00 0 S 404Rule CA 1962 1966 - Oct lastSun 2:00 0 S 405# Zone NAME GMTOFF RULES FORMAT [UNTIL] 406Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 407 -8:00 US P%sT 1946 408 -8:00 CA P%sT 1967 409 -8:00 US P%sT 410 411# Alaska 412# AK%sT is the modern abbreviation for -9:00 per USNO. 413# 414# From Paul Eggert (2001-05-30): 415# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 416# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 417# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 418# also a Friday. Include only the time zone part of this transition, 419# ignoring the switch from Julian to Gregorian, since we can't represent 420# the Julian calendar. 421# 422# As far as we know, none of the exact locations mentioned below were 423# permanently inhabited in 1867 by anyone using either calendar. 424# (Yakutat was colonized by the Russians in 1799, but the settlement 425# was destroyed in 1805 by a Yakutat-kon war party.) However, there 426# were nearby inhabitants in some cases and for our purposes perhaps 427# it's best to simply use the official transition. 428# 429 430# From Steve Ferguson (2011-01-31): 431# The author lives in Alaska and many of the references listed are only 432# available to Alaskan residents. 433# 434# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 435# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 436# </a> 437 438# From Arthur David Olson (2011-02-01): 439# Here's database-relevant material from the 2001 "Alaska History" article: 440# 441# On September 20 [1979]...DOT...officials decreed that on April 27, 442# 1980, Juneau and other nearby communities would move to Yukon Time. 443# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 444# Pacific Time. 445# 446# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 447# Department's September 1979 decision. Juneau and other communities in 448# northern Southeast reverted to Pacific Time on October 26. 449# 450# On October 28 [1983]...the Metlakatla Indian Community Council voted 451# unanimously to keep the reservation on Pacific Time. 452# 453# According to DOT official Joanne Petrie, Indian reservations are not 454# bound to follow time zones imposed by neighboring jurisdictions. 455# 456# (The last is consistent with how the database now handles the Navajo 457# Nation.) 458 459# From Arthur David Olson (2011-02-09): 460# I just spoke by phone with a staff member at the Metlakatla Indian 461# Community office (using contact information available at 462# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 463# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 464# </a>). 465# It's shortly after 1:00 here on the east coast of the United States; 466# the staffer said it was shortly after 10:00 there. When I asked whether 467# that meant they were on Pacific time, they said no--they were on their 468# own time. I asked about daylight saving; they said it wasn't used. I 469# did not inquire about practices in the past. 470 471# Zone NAME GMTOFF RULES FORMAT [UNTIL] 472Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 473 -8:57:41 - LMT 1900 Aug 20 12:00 474 -8:00 - PST 1942 475 -8:00 US P%sT 1946 476 -8:00 - PST 1969 477 -8:00 US P%sT 1980 Apr 27 2:00 478 -9:00 US Y%sT 1980 Oct 26 2:00 479 -8:00 US P%sT 1983 Oct 30 2:00 480 -9:00 US Y%sT 1983 Nov 30 481 -9:00 US AK%sT 482Zone America/Sitka -14:58:47 - LMT 1867 Oct 18 483 -9:01:13 - LMT 1900 Aug 20 12:00 484 -8:00 - PST 1942 485 -8:00 US P%sT 1946 486 -8:00 - PST 1969 487 -8:00 US P%sT 1983 Oct 30 2:00 488 -9:00 US Y%sT 1983 Nov 30 489 -9:00 US AK%sT 490Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 491 -8:46:18 - LMT 1900 Aug 20 12:00 492 -8:00 - PST 1942 493 -8:00 US P%sT 1946 494 -8:00 - PST 1969 495 -8:00 US P%sT 1983 Oct 30 2:00 496 -8:00 US MeST 497Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 498 -9:18:55 - LMT 1900 Aug 20 12:00 499 -9:00 - YST 1942 500 -9:00 US Y%sT 1946 501 -9:00 - YST 1969 502 -9:00 US Y%sT 1983 Nov 30 503 -9:00 US AK%sT 504Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 505 -9:59:36 - LMT 1900 Aug 20 12:00 506 -10:00 - CAT 1942 507 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 508 -10:00 US CAT/CAPT 1946 # Peace 509 -10:00 - CAT 1967 Apr 510 -10:00 - AHST 1969 511 -10:00 US AH%sT 1983 Oct 30 2:00 512 -9:00 US Y%sT 1983 Nov 30 513 -9:00 US AK%sT 514Zone America/Nome 12:58:21 - LMT 1867 Oct 18 515 -11:01:38 - LMT 1900 Aug 20 12:00 516 -11:00 - NST 1942 517 -11:00 US N%sT 1946 518 -11:00 - NST 1967 Apr 519 -11:00 - BST 1969 520 -11:00 US B%sT 1983 Oct 30 2:00 521 -9:00 US Y%sT 1983 Nov 30 522 -9:00 US AK%sT 523Zone America/Adak 12:13:21 - LMT 1867 Oct 18 524 -11:46:38 - LMT 1900 Aug 20 12:00 525 -11:00 - NST 1942 526 -11:00 US N%sT 1946 527 -11:00 - NST 1967 Apr 528 -11:00 - BST 1969 529 -11:00 US B%sT 1983 Oct 30 2:00 530 -10:00 US AH%sT 1983 Nov 30 531 -10:00 US HA%sT 532# The following switches don't quite make our 1970 cutoff. 533# 534# Shanks writes that part of southwest Alaska (e.g. Aniak) 535# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 536# and another part (e.g. Akiak) made the same switch five weeks later. 537# 538# From David Flater (2004-11-09): 539# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 540# Historic Preservation Commission, provided this information, which 541# suggests that Unalaska deviated from statutory time from early 1967 542# possibly until 1983: 543# 544# Minutes of the Unalaska City Council Meeting, January 10, 1967: 545# "Except for St. Paul and Akutan, Unalaska is the only important 546# location not on Alaska Standard Time. The following resolution was 547# made by William Robinson and seconded by Henry Swanson: Be it 548# resolved that the City of Unalaska hereby goes to Alaska Standard 549# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 550# January 14, Alaska Standard Time.) This resolution was passed with 551# three votes for and one against." 552 553# Hawaii 554 555# From Arthur David Olson (2010-12-09): 556# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 557# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 558# the article is available at 559# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 560# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 561# </a> 562# and indicates that standard time was adopted effective noon, January 563# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 564# saving for the period between the last Sunday of each April and the 565# last Sunday of each September, but less than a month later repealed the 566# act," (page 220), that year-round daylight saving time was in effect 567# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 568# when clocks changed) and that clocks were changed by 30 minutes 569# effective the second Sunday of June, 1947 (page 219, with no time of 570# day given for when clocks changed). A footnote for the 1933 changes 571# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 572# and Act 163 (approved 21 May 1933)." 573 574# From Arthur David Olson (2011-01-19): 575# The following is from "Laws of the Territory of Hawaii Passed by the 576# Seventeenth Legislature: Regular Session 1933," available (as of 577# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 578# 90...At 2 o'clock ante meridian of the last Sunday in April of each 579# year, the standard time of this Territory shall be advanced one 580# hour...This Act shall take effect upon its approval. Approved this 26th 581# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 582# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 583# hereby repealed...This Act shall take effect upon its approval, upon 584# which date the standard time of this Territory shall be restored to 585# that existing immediately prior to the taking effect of said Act 90. 586# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 587# of the Territory of Hawaii." 588# 589# Note that 1933-05-21 was a Sunday. 590# We're left to guess the time of day when Act 163 was approved; guess noon. 591 592Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 593 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 594 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 595 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 596 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Fox+2 597 -10:30 US H%sT 1947 Jun 8 2:00 #Schmitt&Fox+2 598 -10:00 - HST 599 600# Now we turn to US areas that have diverged from the consensus since 1970. 601 602# Arizona mostly uses MST. 603 604# From Paul Eggert (2002-10-20): 605# 606# The information in the rest of this paragraph is derived from the 607# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 608# Daylight Saving Time web page (2002-01-23)</a> maintained by the 609# Arizona State Library, Archives and Public Records. 610# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 611# time, but by federal law railroads, airlines, bus lines, military 612# personnel, and some engaged in interstate commerce continued to 613# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 614# Gazette says that was the date the law changed, and that 04-01 was 615# the date the state's clocks would change. In 1945 the State of 616# Arizona used standard time all year, again with exceptions only as 617# mandated by federal law. Arizona observed DST in 1967, but Arizona 618# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 619# 620# Shanks says the 1944 experiment came to an end on 1944-03-17. 621# Go with the Arizona State Library instead. 622 623Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 624 -7:00 US M%sT 1944 Jan 1 00:01 625 -7:00 - MST 1944 Apr 1 00:01 626 -7:00 US M%sT 1944 Oct 1 00:01 627 -7:00 - MST 1967 628 -7:00 US M%sT 1968 Mar 21 629 -7:00 - MST 630# From Arthur David Olson (1988-02-13): 631# A writer from the Inter Tribal Council of Arizona, Inc., 632# notes in private correspondence dated 1987-12-28 that "Presently, only the 633# Navajo Nation participates in the Daylight Saving Time policy, due to its 634# large size and location in three states." (The "only" means that other 635# tribal nations don't use DST.) 636 637Link America/Denver America/Shiprock 638 639# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 640# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 641# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 642# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 643# Teton, Twin Falls, Valley, Washington counties, and the southern 644# quarter of Idaho county) and eastern Oregon (most of Malheur County) 645# switched four weeks late in 1974. 646# 647# Zone NAME GMTOFF RULES FORMAT [UNTIL] 648Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 649 -8:00 US P%sT 1923 May 13 2:00 650 -7:00 US M%sT 1974 651 -7:00 - MST 1974 Feb 3 2:00 652 -7:00 US M%sT 653 654# Indiana 655# 656# For a map of Indiana's time zone regions, see: 657# <a href="http://www.mccsc.edu/time.html"> 658# What time is it in Indiana? 659# </a> (2006-03-01) 660# 661# From Paul Eggert (2007-08-17): 662# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 663# with the following exceptions: 664# 665# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 666# Vandenburgh, and Warrick counties have been like America/Chicago. 667# 668# - Dearborn and Ohio counties have been like America/New_York. 669# 670# - Clark, Floyd, and Harrison counties have been like 671# America/Kentucky/Louisville. 672# 673# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 674# and Switzerland counties have their own time zone histories as noted below. 675# 676# Shanks partitioned Indiana into 345 regions, each with its own time history, 677# and wrote ``Even newspaper reports present contradictory information.'' 678# Those Hoosiers! Such a flighty and changeable people! 679# Fortunately, most of the complexity occurred before our cutoff date of 1970. 680# 681# Other than Indianapolis, the Indiana place names are so nondescript 682# that they would be ambiguous if we left them at the `America' level. 683# So we reluctantly put them all in a subdirectory `America/Indiana'. 684 685# From Paul Eggert (2005-08-16): 686# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 687 688# From Nathan Stratton Treadway (2006-03-30): 689# http://www.dot.gov/affairs/dot0406.htm [3705 B] 690# From Deborah Goldsmith (2006-01-18): 691# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 692# From Paul Eggert (2006-01-20): 693# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 694# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 695# Eastern Time Zone to the Central Time Zone.... The effective date of 696# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 697# changeover date from standard time to Daylight Saving Time." 698# Strictly speaking, this means the affected counties will change their 699# clocks twice that night, but this obviously is in error. The intent 700# is that 01:59:59 EST be followed by 02:00:00 CDT. 701 702# From Gwillim Law (2007-02-10): 703# The Associated Press has been reporting that Pulaski County, Indiana is 704# going to switch from Central to Eastern Time on March 11, 2007.... 705# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 706 707# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 708Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 709Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 710Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 711# Zone NAME GMTOFF RULES FORMAT [UNTIL] 712Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 713 -6:00 US C%sT 1920 714 -6:00 Indianapolis C%sT 1942 715 -6:00 US C%sT 1946 716 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 717 -5:00 - EST 1957 Sep 29 2:00 718 -6:00 - CST 1958 Apr 27 2:00 719 -5:00 - EST 1969 720 -5:00 US E%sT 1971 721 -5:00 - EST 2006 722 -5:00 US E%sT 723# 724# Eastern Crawford County, Indiana, left its clocks alone in 1974, 725# as well as from 1976 through 2005. 726# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 727Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 728Rule Marengo 1951 only - Sep lastSun 2:00 0 S 729Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 730Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 731# Zone NAME GMTOFF RULES FORMAT [UNTIL] 732Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 733 -6:00 US C%sT 1951 734 -6:00 Marengo C%sT 1961 Apr 30 2:00 735 -5:00 - EST 1969 736 -5:00 US E%sT 1974 Jan 6 2:00 737 -6:00 1:00 CDT 1974 Oct 27 2:00 738 -5:00 US E%sT 1976 739 -5:00 - EST 2006 740 -5:00 US E%sT 741# 742# Daviess, Dubois, Knox, and Martin Counties, Indiana, 743# switched from eastern to central time in April 2006, then switched back 744# in November 2007. 745# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 746Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 747Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 748Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 749Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 750Rule Vincennes 1955 only - May 1 0:00 1:00 D 751Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 752Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 753Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 754Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 755# Zone NAME GMTOFF RULES FORMAT [UNTIL] 756Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 757 -6:00 US C%sT 1946 758 -6:00 Vincennes C%sT 1964 Apr 26 2:00 759 -5:00 - EST 1969 760 -5:00 US E%sT 1971 761 -5:00 - EST 2006 Apr 2 2:00 762 -6:00 US C%sT 2007 Nov 4 2:00 763 -5:00 US E%sT 764# 765# Perry County, Indiana, switched from eastern to central time in April 2006. 766# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 767Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 768Rule Perry 1946 only - Sep lastSun 2:00 0 S 769Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 770Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 771Rule Perry 1955 only - May 1 0:00 1:00 D 772Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 773Rule Perry 1960 only - Oct lastSun 2:00 0 S 774Rule Perry 1961 only - Sep lastSun 2:00 0 S 775Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 776# Zone NAME GMTOFF RULES FORMAT [UNTIL] 777Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 778 -6:00 US C%sT 1946 779 -6:00 Perry C%sT 1964 Apr 26 2:00 780 -5:00 - EST 1969 781 -5:00 US E%sT 1971 782 -5:00 - EST 2006 Apr 2 2:00 783 -6:00 US C%sT 784# 785# Pike County, Indiana moved from central to eastern time in 1977, 786# then switched back in 2006, then switched back again in 2007. 787# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 788Rule Pike 1955 only - May 1 0:00 1:00 D 789Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 790Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 791Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 792# Zone NAME GMTOFF RULES FORMAT [UNTIL] 793Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 794 -6:00 US C%sT 1955 795 -6:00 Pike C%sT 1965 Apr 25 2:00 796 -5:00 - EST 1966 Oct 30 2:00 797 -6:00 US C%sT 1977 Oct 30 2:00 798 -5:00 - EST 2006 Apr 2 2:00 799 -6:00 US C%sT 2007 Nov 4 2:00 800 -5:00 US E%sT 801# 802# Starke County, Indiana moved from central to eastern time in 1991, 803# then switched back in 2006. 804# From Arthur David Olson (1991-10-28): 805# An article on page A3 of the Sunday, 1991-10-27 Washington Post 806# notes that Starke County switched from Central time to Eastern time as of 807# 1991-10-27. 808# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 809Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 810Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 811Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 812Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 813Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 814# Zone NAME GMTOFF RULES FORMAT [UNTIL] 815Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 816 -6:00 US C%sT 1947 817 -6:00 Starke C%sT 1962 Apr 29 2:00 818 -5:00 - EST 1963 Oct 27 2:00 819 -6:00 US C%sT 1991 Oct 27 2:00 820 -5:00 - EST 2006 Apr 2 2:00 821 -6:00 US C%sT 822# 823# Pulaski County, Indiana, switched from eastern to central time in 824# April 2006 and then switched back in March 2007. 825# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 826Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 827Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 828Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 829Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 830# Zone NAME GMTOFF RULES FORMAT [UNTIL] 831Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 832 -6:00 US C%sT 1946 833 -6:00 Pulaski C%sT 1961 Apr 30 2:00 834 -5:00 - EST 1969 835 -5:00 US E%sT 1971 836 -5:00 - EST 2006 Apr 2 2:00 837 -6:00 US C%sT 2007 Mar 11 2:00 838 -5:00 US E%sT 839# 840# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 841# Zone NAME GMTOFF RULES FORMAT [UNTIL] 842Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 843 -6:00 US C%sT 1954 Apr 25 2:00 844 -5:00 - EST 1969 845 -5:00 US E%sT 1973 846 -5:00 - EST 2006 847 -5:00 US E%sT 848 849# Part of Kentucky left its clocks alone in 1974. 850# This also includes Clark, Floyd, and Harrison counties in Indiana. 851# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 852Rule Louisville 1921 only - May 1 2:00 1:00 D 853Rule Louisville 1921 only - Sep 1 2:00 0 S 854Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 855Rule Louisville 1941 only - Sep lastSun 2:00 0 S 856Rule Louisville 1946 only - Jun 2 2:00 0 S 857Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 858Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 859# Zone NAME GMTOFF RULES FORMAT [UNTIL] 860Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 861 -6:00 US C%sT 1921 862 -6:00 Louisville C%sT 1942 863 -6:00 US C%sT 1946 864 -6:00 Louisville C%sT 1961 Jul 23 2:00 865 -5:00 - EST 1968 866 -5:00 US E%sT 1974 Jan 6 2:00 867 -6:00 1:00 CDT 1974 Oct 27 2:00 868 -5:00 US E%sT 869# 870# Wayne County, Kentucky 871# 872# From 873# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 874# Lake Cumberland LIFE 875# </a> (1999-01-29) via WKYM-101.7: 876# Clinton County has joined Wayne County in asking the DoT to change from 877# the Central to the Eastern time zone.... The Wayne County government made 878# the same request in December. And while Russell County officials have not 879# taken action, the majority of respondents to a poll conducted there in 880# August indicated they would like to change to "fast time" also. 881# The three Lake Cumberland counties are the farthest east of any U.S. 882# location in the Central time zone. 883# 884# From Rich Wales (2000-08-29): 885# After prolonged debate, and despite continuing deep differences of opinion, 886# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 887# (-0500) time. They won't "fall back" this year. See Sara Shipley, 888# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 889# 890# From Paul Eggert (2001-07-16): 891# The final rule was published in the 892# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 893# Federal Register 65, 160 (2000-08-17), page 50154-50158. 894# </a> 895# 896Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 897 -6:00 US C%sT 1946 898 -6:00 - CST 1968 899 -6:00 US C%sT 2000 Oct 29 2:00 900 -5:00 US E%sT 901 902 903# From Rives McDow (2000-08-30): 904# Here ... are all the changes in the US since 1985. 905# Kearny County, KS (put all of county on central; 906# previously split between MST and CST) ... 1990-10 907# Starke County, IN (from CST to EST) ... 1991-10 908# Oliver County, ND (from MST to CST) ... 1992-10 909# West Wendover, NV (from PST TO MST) ... 1999-10 910# Wayne County, KY (from CST to EST) ... 2000-10 911# 912# From Paul Eggert (2001-07-17): 913# We don't know where the line used to be within Kearny County, KS, 914# so omit that change for now. 915# See America/Indiana/Knox for the Starke County, IN change. 916# See America/North_Dakota/Center for the Oliver County, ND change. 917# West Wendover, NV officially switched from Pacific to mountain time on 918# 1999-10-31. See the 919# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 920# Federal Register 64, 203 (1999-10-21), page 56705-56707. 921# </a> 922# However, the Federal Register says that West Wendover already operated 923# on mountain time, and the rule merely made this official; 924# hence a separate tz entry is not needed. 925 926# Michigan 927# 928# From Bob Devine (1988-01-28): 929# Michigan didn't observe DST from 1968 to 1973. 930# 931# From Paul Eggert (1999-03-31): 932# Shanks writes that Michigan started using standard time on 1885-09-18, 933# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 934# that Detroit kept 935# 936# local time until 1900 when the City Council decreed that clocks should 937# be put back twenty-eight minutes to Central Standard Time. Half the 938# city obeyed, half refused. After considerable debate, the decision 939# was rescinded and the city reverted to Sun time. A derisive offer to 940# erect a sundial in front of the city hall was referred to the 941# Committee on Sewers. Then, in 1905, Central time was adopted 942# by city vote. 943# 944# This story is too entertaining to be false, so go with Howse over Shanks. 945# 946# From Paul Eggert (2001-03-06): 947# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 948# one hour in 1914.'' This change is not in Shanks. We have no more 949# info, so omit this for now. 950# 951# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 952# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 953Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 954Rule Detroit 1948 only - Sep lastSun 2:00 0 S 955Rule Detroit 1967 only - Jun 14 2:00 1:00 D 956Rule Detroit 1967 only - Oct lastSun 2:00 0 S 957# Zone NAME GMTOFF RULES FORMAT [UNTIL] 958Zone America/Detroit -5:32:11 - LMT 1905 959 -6:00 - CST 1915 May 15 2:00 960 -5:00 - EST 1942 961 -5:00 US E%sT 1946 962 -5:00 Detroit E%sT 1973 963 -5:00 US E%sT 1975 964 -5:00 - EST 1975 Apr 27 2:00 965 -5:00 US E%sT 966# 967# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 968# switched from EST to CST/CDT in 1973. 969# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 970Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 971Rule Menominee 1946 only - Sep lastSun 2:00 0 S 972Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 973Rule Menominee 1966 only - Oct lastSun 2:00 0 S 974# Zone NAME GMTOFF RULES FORMAT [UNTIL] 975Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 976 -6:00 US C%sT 1946 977 -6:00 Menominee C%sT 1969 Apr 27 2:00 978 -5:00 - EST 1973 Apr 29 2:00 979 -6:00 US C%sT 980 981# Navassa 982# administered by the US Fish and Wildlife Service 983# claimed by US under the provisions of the 1856 Guano Islands Act 984# also claimed by Haiti 985# occupied 1857/1900 by the Navassa Phosphate Co 986# US lighthouse 1917/1996-09 987# currently uninhabited 988# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 989# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 990# Jimmy Skaggs, _The Great Guano Rush_ (1994). 991 992################################################################################ 993 994 995# From Paul Eggert (2006-03-22): 996# A good source for time zone historical data outside the U.S. is 997# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 998# San Diego: ACS Publications, Inc. (2003). 999# 1000# Gwillim Law writes that a good source 1001# for recent time zone data is the International Air Transport 1002# Association's Standard Schedules Information Manual (IATA SSIM), 1003# published semiannually. Law sent in several helpful summaries 1004# of the IATA's data after 1990. 1005# 1006# Except where otherwise noted, Shanks & Pottenger is the source for 1007# entries through 1990, and IATA SSIM is the source for entries afterwards. 1008# 1009# Other sources occasionally used include: 1010# 1011# Edward W. Whitman, World Time Differences, 1012# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1013# which I found in the UCLA library. 1014# 1015# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1016# William Willett, The Waste of Daylight, 19th edition 1017# </a> (1914-03) 1018# 1019# See the `europe' file for Greenland. 1020 1021# Canada 1022 1023# From Alain LaBont<e'> (1994-11-14): 1024# I post here the time zone abbreviations standardized in Canada 1025# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1026# 1027# UTC Standard time Daylight savings time 1028# offset French English French English 1029# -2:30 - - HAT NDT 1030# -3 - - HAA ADT 1031# -3:30 HNT NST - - 1032# -4 HNA AST HAE EDT 1033# -5 HNE EST HAC CDT 1034# -6 HNC CST HAR MDT 1035# -7 HNR MST HAP PDT 1036# -8 HNP PST HAY YDT 1037# -9 HNY YST - - 1038# 1039# HN: Heure Normale ST: Standard Time 1040# HA: Heure Avanc<e'>e DT: Daylight saving Time 1041# 1042# A: de l'Atlantique Atlantic 1043# C: du Centre Central 1044# E: de l'Est Eastern 1045# M: Mountain 1046# N: Newfoundland 1047# P: du Pacifique Pacific 1048# R: des Rocheuses 1049# T: de Terre-Neuve 1050# Y: du Yukon Yukon 1051# 1052# From Paul Eggert (1994-11-22): 1053# Alas, this sort of thing must be handled by localization software. 1054 1055# Unless otherwise specified, the data for Canada are all from Shanks 1056# & Pottenger. 1057 1058# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1059# 2007-03-01): 1060# The British Columbia government announced yesterday that it will 1061# adjust daylight savings next year to align with changes in the 1062# U.S. and the rest of Canada.... 1063# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1064# ... 1065# Nova Scotia 1066# Daylight saving time will be extended by four weeks starting in 2007.... 1067# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1068# 1069# [For New Brunswick] the new legislation dictates that the time change is to 1070# be done at 02:00 instead of 00:01. 1071# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1072# ... 1073# Manitoba has traditionally changed the clock every fall at 03:00. 1074# As of 2006, the transition is to take place one hour earlier at 02:00. 1075# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1076# ... 1077# [Alberta, Ontario, Quebec] will follow US rules. 1078# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1079# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1080# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1081# ... 1082# P.E.I. will follow US rules.... 1083# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1084# ... 1085# Province of Newfoundland and Labrador.... 1086# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1087# ... 1088# Yukon 1089# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1090# ... 1091# N.W.T. will follow US rules. Whoever maintains the government web site 1092# does not seem to believe in bookmarks. To see the news release, click the 1093# following link and search for "Daylight Savings Time Change". Press the 1094# "Daylight Savings Time Change" link; it will fire off a popup using 1095# JavaScript. 1096# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1097# ... 1098# Nunavut 1099# An amendment to the Interpretation Act was registered on February 19/2007.... 1100# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1101 1102# From Paul Eggert (2006-04-25): 1103# H. David Matthews and Mary Vincent's map 1104# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 1105# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1106# </a> contains detailed boundaries for regions observing nonstandard 1107# time and daylight saving time arrangements in Canada circa 1998. 1108# 1109# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1110# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 1111# information about standard and daylight saving time zones in Canada. 1112# </a> (updated periodically). 1113# Its unofficial information is often taken from Matthews and Vincent. 1114 1115# From Paul Eggert (2006-06-27): 1116# For now, assume all of DST-observing Canada will fall into line with the 1117# new US DST rules, 1118 1119# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1120Rule Canada 1918 only - Apr 14 2:00 1:00 D 1121Rule Canada 1918 only - Oct 31 2:00 0 S 1122Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1123Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1124Rule Canada 1945 only - Sep 30 2:00 0 S 1125Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1126Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1127Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1128Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1129Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1130 1131 1132# Newfoundland and Labrador 1133 1134# From Paul Eggert (2000-10-02): 1135# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1136# but the only part of Labrador that follows the rules is the 1137# southeast corner, including Port Hope Simpson and Mary's Harbour, 1138# but excluding, say, Black Tickle. 1139 1140# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1141Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1142Rule StJohns 1917 only - Sep 17 2:00 0 S 1143# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1144Rule StJohns 1919 only - May 5 23:00 1:00 D 1145Rule StJohns 1919 only - Aug 12 23:00 0 S 1146# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1147Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1148Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1149# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1150# Pottenger. 1151Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1152Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1153# Whitman gives the following transitions: 1154# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1155# but go with Shanks & Pottenger and assume they used Canadian rules. 1156# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1157# Apr 30 - Sep 24; go with Shanks & Pottenger. 1158Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1159Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1160Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1161Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1162Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1163# From Paul Eggert (2000-10-02): 1164# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1165# at 00:01 local time. For now, assume it started in 1987. 1166Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1167Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1168Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1169Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1170Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1171Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1172# 1173# St John's has an apostrophe, but Posix file names can't have apostrophes. 1174# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1175Zone America/St_Johns -3:30:52 - LMT 1884 1176 -3:30:52 StJohns N%sT 1918 1177 -3:30:52 Canada N%sT 1919 1178 -3:30:52 StJohns N%sT 1935 Mar 30 1179 -3:30 StJohns N%sT 1942 May 11 1180 -3:30 Canada N%sT 1946 1181 -3:30 StJohns N%sT 1182 1183# most of east Labrador 1184 1185# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 1186# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1187Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1188 -3:30:52 - NST 1918 1189 -3:30:52 Canada N%sT 1919 1190 -3:30:52 - NST 1935 Mar 30 1191 -3:30 - NST 1936 1192 -3:30 StJohns N%sT 1942 May 11 1193 -3:30 Canada N%sT 1946 1194 -3:30 StJohns N%sT 1966 Mar 15 2:00 1195 -4:00 StJohns A%sT 1196 1197 1198# west Labrador, Nova Scotia, Prince Edward I 1199 1200# From Paul Eggert (2006-03-22): 1201# Shanks & Pottenger write that since 1970 most of this region has been like 1202# Halifax. Many locales did not observe peacetime DST until 1972; 1203# Glace Bay, NS is the largest that we know of. 1204# Shanks & Pottenger also write that Liverpool, NS was the only town 1205# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1206# this is a typo. 1207 1208# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1209Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1210Rule Halifax 1916 only - Oct 1 0:00 0 S 1211Rule Halifax 1920 only - May 9 0:00 1:00 D 1212Rule Halifax 1920 only - Aug 29 0:00 0 S 1213Rule Halifax 1921 only - May 6 0:00 1:00 D 1214Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1215Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1216Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1217Rule Halifax 1923 only - Sep 4 0:00 0 S 1218Rule Halifax 1924 only - Sep 15 0:00 0 S 1219Rule Halifax 1925 only - Sep 28 0:00 0 S 1220Rule Halifax 1926 only - May 16 0:00 1:00 D 1221Rule Halifax 1926 only - Sep 13 0:00 0 S 1222Rule Halifax 1927 only - May 1 0:00 1:00 D 1223Rule Halifax 1927 only - Sep 26 0:00 0 S 1224Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1225Rule Halifax 1928 only - Sep 9 0:00 0 S 1226Rule Halifax 1929 only - Sep 3 0:00 0 S 1227Rule Halifax 1930 only - Sep 15 0:00 0 S 1228Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1229Rule Halifax 1932 only - May 1 0:00 1:00 D 1230Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1231Rule Halifax 1933 only - Oct 2 0:00 0 S 1232Rule Halifax 1934 only - May 20 0:00 1:00 D 1233Rule Halifax 1934 only - Sep 16 0:00 0 S 1234Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1235Rule Halifax 1935 only - Sep 30 0:00 0 S 1236Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1237Rule Halifax 1936 only - Sep 14 0:00 0 S 1238Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1239Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1240Rule Halifax 1939 only - May 28 0:00 1:00 D 1241Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1242Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1243Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1244Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1245Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1246Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1247Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1248Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1249Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1250# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1251Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1252 -4:00 Halifax A%sT 1918 1253 -4:00 Canada A%sT 1919 1254 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1255 -4:00 Canada A%sT 1946 1256 -4:00 Halifax A%sT 1974 1257 -4:00 Canada A%sT 1258Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1259 -4:00 Canada A%sT 1953 1260 -4:00 Halifax A%sT 1954 1261 -4:00 - AST 1972 1262 -4:00 Halifax A%sT 1974 1263 -4:00 Canada A%sT 1264 1265# New Brunswick 1266 1267# From Paul Eggert (2007-01-31): 1268# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1269# says they changed at 00:01 through 2006, and 1270# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1271# clear that this was the case since at least 1993. 1272# For now, assume it started in 1993. 1273 1274# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1275Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1276Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1277Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1278Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1279Rule Moncton 1939 only - May 27 1:00 1:00 D 1280Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1281Rule Moncton 1940 only - May 19 1:00 1:00 D 1282Rule Moncton 1941 only - May 4 1:00 1:00 D 1283Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1284Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1285Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1286Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1287Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1288# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1289Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1290 -5:00 - EST 1902 Jun 15 1291 -4:00 Canada A%sT 1933 1292 -4:00 Moncton A%sT 1942 1293 -4:00 Canada A%sT 1946 1294 -4:00 Moncton A%sT 1973 1295 -4:00 Canada A%sT 1993 1296 -4:00 Moncton A%sT 2007 1297 -4:00 Canada A%sT 1298 1299# Quebec 1300 1301# From Paul Eggert (2006-07-09): 1302# Shanks & Pottenger write that since 1970 most of Quebec has been 1303# like Montreal. 1304 1305# From Paul Eggert (2006-06-27): 1306# Matthews and Vincent (1998) also write that Quebec east of the -63 1307# meridian is supposed to observe AST, but residents as far east as 1308# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1309# In "Official time in Quebec" the Quebec department of justice writes in 1310# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1311# that "The residents of the Municipality of the 1312# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1313# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1314# written and use Atlantic standard time all year round. The same applies to 1315# the residents of the Native facilities along the lower North Shore." 1316# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1317# says this common practice was codified into law as of 2007. 1318# For lack of better info, guess this practice began around 1970, contra to 1319# Shanks & Pottenger who have this region observing AST/ADT. 1320 1321# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1322Rule Mont 1917 only - Mar 25 2:00 1:00 D 1323Rule Mont 1917 only - Apr 24 0:00 0 S 1324Rule Mont 1919 only - Mar 31 2:30 1:00 D 1325Rule Mont 1919 only - Oct 25 2:30 0 S 1326Rule Mont 1920 only - May 2 2:30 1:00 D 1327Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1328Rule Mont 1921 only - May 1 2:00 1:00 D 1329Rule Mont 1922 only - Apr 30 2:00 1:00 D 1330Rule Mont 1924 only - May 17 2:00 1:00 D 1331Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1332Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1333# The 1927-to-1937 rules can be expressed more simply as 1334# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1335# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1336# The rules below avoid use of 24:00 1337# (which pre-1998 versions of zic cannot handle). 1338Rule Mont 1927 only - May 1 0:00 1:00 D 1339Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1340Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1341Rule Mont 1932 only - May 1 0:00 1:00 D 1342Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1343Rule Mont 1933 only - Oct 1 0:00 0 S 1344Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1345Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1346Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1347Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1348Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1349Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1350 1351# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1352Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1353 -4:00 Canada A%sT 1970 1354 -4:00 - AST 1355Zone America/Montreal -4:54:16 - LMT 1884 1356 -5:00 Mont E%sT 1918 1357 -5:00 Canada E%sT 1919 1358 -5:00 Mont E%sT 1942 Feb 9 2:00s 1359 -5:00 Canada E%sT 1946 1360 -5:00 Mont E%sT 1974 1361 -5:00 Canada E%sT 1362 1363 1364# Ontario 1365 1366# From Paul Eggert (2006-07-09): 1367# Shanks & Pottenger write that since 1970 most of Ontario has been like 1368# Toronto. 1369# Thunder Bay skipped DST in 1973. 1370# Many smaller locales did not observe peacetime DST until 1974; 1371# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1372# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1373 1374# From Mark Brader (2003-07-26): 1375# [According to the Toronto Star] Orillia, Ontario, adopted DST 1376# effective Saturday, 1912-06-22, 22:00; the article mentions that 1377# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1378# have already done so. In Orillia DST was to run until Saturday, 1379# 1912-08-31 (no time mentioned), but it was met with considerable 1380# hostility from certain segments of the public, and was revoked after 1381# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1382# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1383# earlier in June). 1384# 1385# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1386 1387# From Paul Eggert (1997-10-17): 1388# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1389# says that Atikokan, Ontario currently does not observe DST, 1390# but will vote on 11-10 whether to use EST/EDT. 1391# He also writes that the 1392# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1393# Ontario Time Act (1990, Chapter T.9) 1394# </a> 1395# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1396# Officially Atikokan is therefore on CST/CDT, and most likely this report 1397# concerns a non-official time observed as a matter of local practice. 1398# 1399# From Paul Eggert (2000-10-02): 1400# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1401# New Osnaburgh observe CST all year, that Big Trout Lake observes 1402# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1403# violation of the official Ontario rules. 1404# 1405# From Paul Eggert (2006-07-09): 1406# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1407# 2005-07-21 Chronicle-Journal, which said: 1408# 1409# The clocks in Atikokan stay set on standard time year-round. 1410# This means they spend about half the time on central time and 1411# the other half on eastern time. 1412# 1413# For the most part, the system works, Mayor Dennis Brown said. 1414# 1415# "The majority of businesses in Atikokan deal more with Eastern 1416# Canada, but there are some that deal with Western Canada," he 1417# said. "I don't see any changes happening here." 1418# 1419# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1420# [New Osnaburgh] follow the same practice." 1421 1422# From Garry McKinnon (2006-07-14) via Chris Walton: 1423# I chatted with a member of my board who has an outstanding memory 1424# and a long history in Atikokan (and in the telecom industry) and he 1425# can say for certain that Atikokan has been practicing the current 1426# time keeping since 1952, at least. 1427 1428# From Paul Eggert (2006-07-17): 1429# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1430# ever since standard time was introduced, but the information from 1431# McKinnon sounds more authoritative. For now, assume that Atikokan 1432# switched to EST immediately after WWII era daylight saving time 1433# ended. This matches the old (less-populous) America/Coral_Harbour 1434# entry since our cutoff date of 1970, so we can move 1435# America/Coral_Harbour to the 'backward' file. 1436 1437# From Mark Brader (2010-03-06): 1438# 1439# Currently the database has: 1440# 1441# # Ontario 1442# 1443# # From Paul Eggert (2006-07-09): 1444# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1445# # Toronto. 1446# # Thunder Bay skipped DST in 1973. 1447# # Many smaller locales did not observe peacetime DST until 1974; 1448# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1449# 1450# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1451# right corner of page 1, it says that Toronto will return to standard 1452# time at 2 am Sunday morning (which agrees with the database), and that: 1453# 1454# The one-hour setback will go into effect throughout most of Ontario, 1455# except in areas like Windsor which remains on standard time all year. 1456# 1457# Windsor is, of course, a lot larger than Nipigon. 1458# 1459# I only came across this incidentally. I don't know if Windsor began 1460# observing DST when Detroit did, or in 1974, or on some other date. 1461# 1462# By the way, the article continues by noting that: 1463# 1464# Some cities in the United States have pushed the deadline back 1465# three weeks and will change over from daylight saving in October. 1466 1467# From Arthur David Olson (2010-07-17): 1468# 1469# "Standard Time and Time Zones in Canada" appeared in 1470# The Journal of The Royal Astronomical Society of Canada, 1471# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1472# was available at 1473# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1474# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1475# </a> 1476# 1477# It includes the text below (starting on page 57): 1478# 1479# A list of the places in Canada using daylight saving time would 1480# require yearly revision. From information kindly furnished by 1481# the provincial governments and by the postmasters in many cities 1482# and towns, it is found that the following places used daylight sav- 1483# ing in 1930. The information for the province of Quebec is definite, 1484# for the other provinces only approximate: 1485# 1486# Province Daylight saving time used 1487# Prince Edward Island Not used. 1488# Nova Scotia In Halifax only. 1489# New Brunswick In St. John only. 1490# Quebec In the following places: 1491# Montreal Lachine 1492# Quebec Mont-Royal 1493# Levis Iberville 1494# St. Lambert Cap de la Madeleine 1495# Verdun Loretteville 1496# Westmount Richmond 1497# Outremont St. Jerome 1498# Longueuil Greenfield Park 1499# Arvida Waterloo 1500# Chambly-Canton Beaulieu 1501# Melbourne La Tuque 1502# St. Theophile Buckingham 1503# Ontario Used generally in the cities and towns along 1504# the southerly part of the province. Not 1505# used in the northwesterlhy part. 1506# Manitoba Not used. 1507# Saskatchewan In Regina only. 1508# Alberta Not used. 1509# British Columbia Not used. 1510# 1511# With some exceptions, the use of daylight saving may be said to be limited 1512# to those cities and towns lying between Quebec city and Windsor, Ont. 1513 1514# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1515Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1516Rule Toronto 1919 only - Oct 26 0:00 0 S 1517Rule Toronto 1920 only - May 2 2:00 1:00 D 1518Rule Toronto 1920 only - Sep 26 0:00 0 S 1519Rule Toronto 1921 only - May 15 2:00 1:00 D 1520Rule Toronto 1921 only - Sep 15 2:00 0 S 1521Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1522# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1523# was meant. 1524Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1525Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1526# The 1927-to-1939 rules can be expressed more simply as 1527# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1528# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1529# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1530# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1531# The rules below avoid use of Sun>=25 1532# (which pre-2004 versions of zic cannot handle). 1533Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1534Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1535Rule Toronto 1932 only - May 1 2:00 1:00 D 1536Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1537Rule Toronto 1933 only - Oct 1 2:00 0 S 1538Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1539Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1540Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1541Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1542Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1543Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1544Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1545Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1546Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1547# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1548# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1549# is wrong, and that he had confirmed it by checking the 1971-10-30 1550# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1551Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1552 1553# From Paul Eggert (2003-07-27): 1554# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1555# Port Arthur, Ontario, the principle of the Bill has been in 1556# operation for the past three years, and in the City of Moose Jaw, 1557# Saskatchewan, for one year." 1558 1559# From David Bryan via Tory Tronrud, Director/Curator, 1560# Thunder Bay Museum (2003-11-12): 1561# There is some suggestion, however, that, by-law or not, daylight 1562# savings time was being practiced in Fort William and Port Arthur 1563# before 1909.... [I]n 1910, the line between the Eastern and Central 1564# Time Zones was permanently moved about two hundred miles west to 1565# include the Thunder Bay area.... When Canada adopted daylight 1566# savings time in 1916, Fort William and Port Arthur, having done so 1567# already, did not change their clocks.... During the Second World 1568# War,... [t]he cities agreed to implement DST during the summer 1569# months for the remainder of the war years. 1570 1571# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1572Zone America/Toronto -5:17:32 - LMT 1895 1573 -5:00 Canada E%sT 1919 1574 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1575 -5:00 Canada E%sT 1946 1576 -5:00 Toronto E%sT 1974 1577 -5:00 Canada E%sT 1578Zone America/Thunder_Bay -5:57:00 - LMT 1895 1579 -6:00 - CST 1910 1580 -5:00 - EST 1942 1581 -5:00 Canada E%sT 1970 1582 -5:00 Mont E%sT 1973 1583 -5:00 - EST 1974 1584 -5:00 Canada E%sT 1585Zone America/Nipigon -5:53:04 - LMT 1895 1586 -5:00 Canada E%sT 1940 Sep 29 1587 -5:00 1:00 EDT 1942 Feb 9 2:00s 1588 -5:00 Canada E%sT 1589Zone America/Rainy_River -6:18:16 - LMT 1895 1590 -6:00 Canada C%sT 1940 Sep 29 1591 -6:00 1:00 CDT 1942 Feb 9 2:00s 1592 -6:00 Canada C%sT 1593Zone America/Atikokan -6:06:28 - LMT 1895 1594 -6:00 Canada C%sT 1940 Sep 29 1595 -6:00 1:00 CDT 1942 Feb 9 2:00s 1596 -6:00 Canada C%sT 1945 Sep 30 2:00 1597 -5:00 - EST 1598 1599 1600# Manitoba 1601 1602# From Rob Douglas (2006-04-06): 1603# the old Manitoba Time Act - as amended by Bill 2, assented to 1604# March 27, 1987 ... said ... 1605# "between two o'clock Central Standard Time in the morning of 1606# the first Sunday of April of each year and two o'clock Central 1607# Standard Time in the morning of the last Sunday of October next 1608# following, one hour in advance of Central Standard Time."... 1609# I believe that the English legislation [of the old time act] had = 1610# been assented to (March 22, 1967).... 1611# Also, as far as I can tell, there was no order-in-council varying 1612# the time of Daylight Saving Time for 2005 and so the provisions of 1613# the 1987 version would apply - the changeover was at 2:00 Central 1614# Standard Time (i.e. not until 3:00 Central Daylight Time). 1615 1616# From Paul Eggert (2006-04-10): 1617# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1618# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1619# it was also 02:00s in 1966. 1620 1621# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1622Rule Winn 1916 only - Apr 23 0:00 1:00 D 1623Rule Winn 1916 only - Sep 17 0:00 0 S 1624Rule Winn 1918 only - Apr 14 2:00 1:00 D 1625Rule Winn 1918 only - Oct 31 2:00 0 S 1626Rule Winn 1937 only - May 16 2:00 1:00 D 1627Rule Winn 1937 only - Sep 26 2:00 0 S 1628Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1629Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1630Rule Winn 1945 only - Sep lastSun 2:00 0 S 1631Rule Winn 1946 only - May 12 2:00 1:00 D 1632Rule Winn 1946 only - Oct 13 2:00 0 S 1633Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1634Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1635Rule Winn 1950 only - May 1 2:00 1:00 D 1636Rule Winn 1950 only - Sep 30 2:00 0 S 1637Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1638Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1639Rule Winn 1959 only - Oct lastSun 2:00 0 S 1640Rule Winn 1960 only - Sep lastSun 2:00 0 S 1641Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1642Rule Winn 1963 only - Sep 22 2:00 0 S 1643Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1644Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1645Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1646# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1647Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1648 -6:00 Winn C%sT 2006 1649 -6:00 Canada C%sT 1650 1651 1652# Saskatchewan 1653 1654# From Mark Brader (2003-07-26): 1655# The first actual adoption of DST in Canada was at the municipal 1656# level. As the [Toronto] Star put it (1912-06-07), "While people 1657# elsewhere have long been talking of legislation to save daylight, 1658# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1659# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1660# presumably late evening, as below), and would run until "the end of 1661# the summer". The discrepancy between municipal time and railroad 1662# time was noted. 1663 1664# From Paul Eggert (2003-07-27): 1665# Willett (1914-03) notes that DST "has been in operation ... in the 1666# City of Moose Jaw, Saskatchewan, for one year." 1667 1668# From Paul Eggert (2006-03-22): 1669# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1670# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1671# Other western towns (e.g. Lloydminster) are like Edmonton. 1672# Matthews and Vincent (1998) write that Denare Beach and Creighton 1673# are like Winnipeg, in violation of Saskatchewan law. 1674 1675# From W. Jones (1992-11-06): 1676# The. . .below is based on information I got from our law library, the 1677# provincial archives, and the provincial Community Services department. 1678# A precise history would require digging through newspaper archives, and 1679# since you didn't say what you wanted, I didn't bother. 1680# 1681# Saskatchewan is split by a time zone meridian (105W) and over the years 1682# the boundary became pretty ragged as communities near it reevaluated 1683# their affiliations in one direction or the other. In 1965 a provincial 1684# referendum favoured legislating common time practices. 1685# 1686# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1687# Saskatchewan 1978) was proclaimed, and established that the eastern 1688# part of Saskatchewan would use CST year round, that districts in 1689# northwest Saskatchewan would by default follow CST but could opt to 1690# follow Mountain Time rules (thus 1 hour difference in the winter and 1691# zero in the summer), and that districts in southwest Saskatchewan would 1692# by default follow MT but could opt to follow CST. 1693# 1694# It took a few years for the dust to settle (I know one story of a town 1695# on one time zone having its school in another, such that a mom had to 1696# serve her family lunch in two shifts), but presently it seems that only 1697# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1698# rules any more; all other districts appear to have used CST year round 1699# since sometime in the 1960s. 1700 1701# From Chris Walton (2006-06-26): 1702# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1703# long and rather painful to read. 1704# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1705 1706# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1707Rule Regina 1918 only - Apr 14 2:00 1:00 D 1708Rule Regina 1918 only - Oct 31 2:00 0 S 1709Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1710Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1711Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1712Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1713Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1714Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1715Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1716Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1717Rule Regina 1945 only - Sep lastSun 2:00 0 S 1718Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1719Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1720Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1721Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1722Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1723Rule Regina 1959 only - Oct lastSun 2:00 0 S 1724# 1725Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1726Rule Swift 1957 only - Oct lastSun 2:00 0 S 1727Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1728Rule Swift 1959 only - Oct lastSun 2:00 0 S 1729Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1730# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1731Zone America/Regina -6:58:36 - LMT 1905 Sep 1732 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1733 -6:00 - CST 1734Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1735 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1736 -7:00 Regina M%sT 1950 1737 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1738 -6:00 - CST 1739 1740 1741# Alberta 1742 1743# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1744Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1745Rule Edm 1918 only - Oct 31 2:00 0 S 1746Rule Edm 1919 only - May 27 2:00 0 S 1747Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1748Rule Edm 1920 only - Oct lastSun 2:00 0 S 1749Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1750Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1751Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1752Rule Edm 1945 only - Sep lastSun 2:00 0 S 1753Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1754Rule Edm 1947 only - Sep lastSun 2:00 0 S 1755Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1756Rule Edm 1967 only - Oct lastSun 2:00 0 S 1757Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1758Rule Edm 1969 only - Oct lastSun 2:00 0 S 1759Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1760Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1761# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1762Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1763 -7:00 Edm M%sT 1987 1764 -7:00 Canada M%sT 1765 1766 1767# British Columbia 1768 1769# From Paul Eggert (2006-03-22): 1770# Shanks & Pottenger write that since 1970 most of this region has 1771# been like Vancouver. 1772# Dawson Creek uses MST. Much of east BC is like Edmonton. 1773# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1774 1775# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1776Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1777Rule Vanc 1918 only - Oct 31 2:00 0 S 1778Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1779Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1780Rule Vanc 1945 only - Sep 30 2:00 0 S 1781Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1782Rule Vanc 1946 only - Oct 13 2:00 0 S 1783Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1784Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1785# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1786Zone America/Vancouver -8:12:28 - LMT 1884 1787 -8:00 Vanc P%sT 1987 1788 -8:00 Canada P%sT 1789Zone America/Dawson_Creek -8:00:56 - LMT 1884 1790 -8:00 Canada P%sT 1947 1791 -8:00 Vanc P%sT 1972 Aug 30 2:00 1792 -7:00 - MST 1793 1794 1795# Northwest Territories, Nunavut, Yukon 1796 1797# From Paul Eggert (2006-03-22): 1798# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1799# Mathew Englander (1996-10-07) gives the following refs: 1800# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1801# c. 7 defines Yukon standard time as UTC-9. This is still valid; 1802# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1803# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1804# * O.I.C. 1980/02 established DST. 1805# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1806# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1807# with Englander. 1808# From Chris Walton (2006-06-26): 1809# Here is a link to the old daylight saving portion of the interpretation 1810# act which was last updated in 1987: 1811# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1812 1813# From Rives McDow (1999-09-04): 1814# Nunavut ... moved ... to incorporate the whole territory into one time zone. 1815# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1816# Nunavut moves to single time zone Oct. 31 1817# </a> 1818# 1819# From Antoine Leca (1999-09-06): 1820# We then need to create a new timezone for the Kitikmeot region of Nunavut 1821# to differentiate it from the Yellowknife region. 1822 1823# From Paul Eggert (1999-09-20): 1824# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1825# Basic Facts: The New Territory 1826# </a> (1999) reports that Pangnirtung operates on eastern time, 1827# and that Coral Harbour does not observe DST. We don't know when 1828# Pangnirtung switched to eastern time; we'll guess 1995. 1829 1830# From Rives McDow (1999-11-08): 1831# On October 31, when the rest of Nunavut went to Central time, 1832# Pangnirtung wobbled. Here is the result of their wobble: 1833# 1834# The following businesses and organizations in Pangnirtung use Central Time: 1835# 1836# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1837# Eastern Arctic National Parks, A & D Specialist 1838# 1839# The following businesses and organizations in Pangnirtung use Eastern Time: 1840# 1841# Hamlet office, All other businesses, Both schools, Airport operator 1842# 1843# This has made for an interesting situation there, which warranted the news. 1844# No one there that I spoke with seems concerned, or has plans to 1845# change the local methods of keeping time, as it evidently does not 1846# really interfere with any activities or make things difficult locally. 1847# They plan to celebrate New Year's turn-over twice, one hour apart, 1848# so it appears that the situation will last at least that long. 1849# The Nunavut Intergovernmental Affairs hopes that they will "come to 1850# their senses", but the locals evidently don't see any problem with 1851# the current state of affairs. 1852 1853# From Michaela Rodrigue, writing in the 1854# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1855# Nunatsiaq News (1999-11-19)</a>: 1856# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1857# central - or Nunavut time - for government offices, and eastern time 1858# for municipal offices and schools.... Igloolik [was similar but then] 1859# made the switch to central time on Saturday, Nov. 6. 1860 1861# From Paul Eggert (2000-10-02): 1862# Matthews and Vincent (1998) say the following, but we lack histories 1863# for these potential new Zones. 1864# 1865# The Canadian Forces station at Alert uses Eastern Time while the 1866# handful of residents at the Eureka weather station [in the Central 1867# zone] skip daylight savings. Baffin Island, which is crossed by the 1868# Central, Eastern and Atlantic Time zones only uses Eastern Time. 1869# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1870# Central Time and Southampton Island [in the Central zone] is not 1871# required to use daylight savings. 1872 1873# From 1874# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 1875# Nunavut now has two time zones 1876# </a> (2000-11-10): 1877# The Nunavut government would allow its employees in Kugluktuk and 1878# Cambridge Bay to operate on central time year-round, putting them 1879# one hour behind the rest of Nunavut for six months during the winter. 1880# At the end of October the two communities had rebelled against 1881# Nunavut's unified time zone, refusing to shift to eastern time with 1882# the rest of the territory for the winter. Cambridge Bay remained on 1883# central time, while Kugluktuk, even farther west, reverted to 1884# mountain time, which they had used before the advent of Nunavut's 1885# unified time zone in 1999. 1886# 1887# From Rives McDow (2001-01-20), quoting the Nunavut government: 1888# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1889 1890# From Paul Eggert (2000-12-04): 1891# Let's just keep track of the official times for now. 1892 1893# From Rives McDow (2001-03-07): 1894# The premier of Nunavut has issued a ministerial statement advising 1895# that effective 2001-04-01, the territory of Nunavut will revert 1896# back to three time zones (mountain, central, and eastern). Of the 1897# cities in Nunavut, Coral Harbor is the only one that I know of that 1898# has said it will not observe dst, staying on EST year round. I'm 1899# checking for more info, and will get back to you if I come up with 1900# more. 1901# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 1902 1903# From Gwillim Law (2005-05-21): 1904# According to maps at 1905# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1906# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1907# (both dated 2003), and 1908# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1909# (from a 1998 Canadian Geographic article), the de facto and de jure time 1910# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1911# round. Using Google, it's easy to find other websites that confirm this. 1912# I wasn't able to find how far back this time regimen goes, but since it 1913# predates the creation of Nunavut, it probably goes back many years.... 1914# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1915# 1916# From Paul Eggert (2005-07-26): 1917# For lack of better information, assume that Southampton Island observed 1918# daylight saving only during wartime. 1919 1920# From Chris Walton (2007-03-01): 1921# ... the community of Resolute (located on Cornwallis Island in 1922# Nunavut) moved from Central Time to Eastern Time last November. 1923# Basically the community did not change its clocks at the end of 1924# daylight saving.... 1925# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1926 1927# From Chris Walton (2007-03-14): 1928# Today I phoned the "hamlet office" to find out what Resolute was doing with 1929# its clocks. 1930# 1931# The individual that answered the phone confirmed that the clocks did not 1932# move at the end of daylight saving on October 29/2006. He also told me that 1933# the clocks did not move this past weekend (March 11/2007).... 1934 1935# From Chris Walton (2008-11-13): 1936# ...the residents of Resolute believe that they are changing "time zones" 1937# twice a year. In winter months, local time is qualified with "Eastern 1938# Time" which is really "Eastern Standard Time (UTC-5)". In summer 1939# months, local time is qualified with "Central Time" which is really 1940# "Central Daylight Time (UTC-5)"... 1941 1942# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1943Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 1944Rule NT_YK 1918 only - Oct 27 2:00 0 S 1945Rule NT_YK 1919 only - May 25 2:00 1:00 D 1946Rule NT_YK 1919 only - Nov 1 0:00 0 S 1947Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1948Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 1949Rule NT_YK 1945 only - Sep 30 2:00 0 S 1950Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 1951Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 1952Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1953Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1954Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 1955# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1956# aka Panniqtuuq 1957Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 1958 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 1959 -5:00 Canada E%sT 1999 Oct 31 2:00 1960 -6:00 Canada C%sT 2000 Oct 29 2:00 1961 -5:00 Canada E%sT 1962# formerly Frobisher Bay 1963Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 1964 -5:00 NT_YK E%sT 1999 Oct 31 2:00 1965 -6:00 Canada C%sT 2000 Oct 29 2:00 1966 -5:00 Canada E%sT 1967# aka Qausuittuq 1968# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1969Rule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1970Rule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1971Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 1972 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1973 -5:00 - EST 2001 Apr 1 3:00 1974 -6:00 Canada C%sT 2006 Oct 29 2:00 1975 -5:00 Resolute %sT 1976# aka Kangiqiniq 1977Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1978 -6:00 NT_YK C%sT 2000 Oct 29 2:00 1979 -5:00 - EST 2001 Apr 1 3:00 1980 -6:00 Canada C%sT 1981# aka Iqaluktuuttiaq 1982Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 1983 -7:00 NT_YK M%sT 1999 Oct 31 2:00 1984 -6:00 Canada C%sT 2000 Oct 29 2:00 1985 -5:00 - EST 2000 Nov 5 0:00 1986 -6:00 - CST 2001 Apr 1 3:00 1987 -7:00 Canada M%sT 1988Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1989 -7:00 NT_YK M%sT 1980 1990 -7:00 Canada M%sT 1991Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 1992 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1993 -7:00 NT_YK M%sT 1980 1994 -7:00 Canada M%sT 1995Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 1996 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1997 -8:00 NT_YK P%sT 1980 1998 -8:00 Canada P%sT 1999Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2000 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2001 -8:00 NT_YK P%sT 1980 2002 -8:00 Canada P%sT 2003 2004 2005############################################################################### 2006 2007# Mexico 2008 2009# From Paul Eggert (2001-03-05): 2010# The Investigation and Analysis Service of the 2011# Mexican Library of Congress (MLoC) has published a 2012# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 2013# history of Mexican local time (in Spanish) 2014# </a>. 2015# 2016# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2017# (In all cases we go with the MLoC.) 2018# S&P report that Baja was at -8:00 in 1922/1923. 2019# S&P say the 1930 transition in Baja was 1930-11-16. 2020# S&P report no DST during summer 1931. 2021# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2022 2023# From Gwillim Law (2001-02-20): 2024# There are some other discrepancies between the Decrees page and the 2025# tz database. I think they can best be explained by supposing that 2026# the researchers who prepared the Decrees page failed to find some of 2027# the relevant documents. 2028 2029# From Alan Perry (1996-02-15): 2030# A guy from our Mexico subsidiary finally found the Presidential Decree 2031# outlining the timezone changes in Mexico. 2032# 2033# ------------- Begin Forwarded Message ------------- 2034# 2035# I finally got my hands on the Official Presidential Decree that sets up the 2036# rules for the DST changes. The rules are: 2037# 2038# 1. The country is divided in 3 timezones: 2039# - Baja California Norte (the Mexico/BajaNorte TZ) 2040# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2041# - The rest of the country (the Mexico/General TZ) 2042# 2043# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2044# at 2:00 AM, the times in each zone are as follows: 2045# BajaNorte: GMT+7 2046# BajaSur: GMT+6 2047# General: GMT+5 2048# 2049# 3. The rest of the year, the times are as follows: 2050# BajaNorte: GMT+8 2051# BajaSur: GMT+7 2052# General: GMT+6 2053# 2054# The Decree was published in Mexico's Official Newspaper on January 4th. 2055# 2056# -------------- End Forwarded Message -------------- 2057# From Paul Eggert (1996-06-12): 2058# For an English translation of the decree, see 2059# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 2060# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 2061# </a> 2062 2063# From Rives McDow (1998-10-08): 2064# The State of Quintana Roo has reverted back to central STD and DST times 2065# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2066 2067# From Rives McDow (2000-01-10): 2068# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2069# zone 5 hours from the International Date Line, and will not observe daylight 2070# savings time so as to stay on the same time zone as the southern part of 2071# Arizona year round. 2072 2073# From Jesper Norgaard, translating 2074# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2075# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2076# Syndicate of Education Workers, refuse to apply daylight saving each 2077# year, so that the more than 10,000 schools work at normal hour the 2078# whole year. 2079 2080# From Gwillim Law (2001-01-19): 2081# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2082# (translated):... 2083# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2084# that Summer Time will be reduced from seven to five months, starting 2085# this year.... 2086# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 2087# [translated], says "summer time will ... take effect on the first Sunday 2088# in May, and end on the last Sunday of September. 2089 2090# From Arthur David Olson (2001-01-25): 2091# The 2001-01-24 traditional Washington Post contained the page one 2092# story "Timely Issue Divides Mexicans."... 2093# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2094# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 2095# Mexico City and its 20 million residents on a different time than 2096# the rest of the country..." In particular, Lopez Obrador would abolish 2097# observation of Daylight Saving Time. 2098 2099# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 2100# Official statute published by the Energy Department 2101# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2102# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 2103 2104# From Paul Eggert (2001-03-03): 2105# 2106# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 2107# James F. Smith writes in today's LA Times 2108# </a> 2109# * Sonora will continue to observe standard time. 2110# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 2111# the Federal District will not adopt DST. 2112# * 4 of 16 district leaders announced they'll ignore the decree. 2113# * The decree does not affect federal-controlled facilities including 2114# the airport, banks, hospitals, and schools. 2115# 2116# For now we'll assume that the Federal District will bow to federal rules. 2117 2118# From Jesper Norgaard (2001-04-01): 2119# I found some references to the Mexican application of daylight 2120# saving, which modifies what I had already sent you, stating earlier 2121# that a number of northern Mexican states would go on daylight 2122# saving. The modification reverts this to only cover Baja California 2123# (Norte), while all other states (except Sonora, who has no daylight 2124# saving all year) will follow the original decree of president 2125# Vicente Fox, starting daylight saving May 6, 2001 and ending 2126# September 30, 2001. 2127# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 2128# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2129 2130# From Reuters (2001-09-04): 2131# Mexico's Supreme Court on Tuesday declared that daylight savings was 2132# unconstitutional in Mexico City, creating the possibility the 2133# capital will be in a different time zone from the rest of the nation 2134# next year.... The Supreme Court's ruling takes effect at 2:00 2135# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2136# standard time. "This is so residents of the Federal District are not 2137# subject to unexpected time changes," a statement from the court said. 2138 2139# From Jesper Norgaard Welen (2002-03-12): 2140# ... consulting my local grocery store(!) and my coworkers, they all insisted 2141# that a new decision had been made to reinstate US style DST in Mexico.... 2142# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2143# confirms this. Sonora as usual is the only state where DST is not applied. 2144 2145# From Steffen Thorsen (2009-12-28): 2146# 2147# Steffen Thorsen wrote: 2148# > Mexico's House of Representatives has approved a proposal for northern 2149# > Mexico's border cities to share the same daylight saving schedule as 2150# > the United States. 2151# Now this has passed both the Congress and the Senate, so starting from 2152# 2010, some border regions will be the same: 2153# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2154# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2155# </a> 2156# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2157# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2158# </a> 2159# (Spanish) 2160# 2161# Could not find the new law text, but the proposed law text changes are here: 2162# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2163# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2164# </a> 2165# (Gaceta Parlamentaria) 2166# 2167# There is also a list of the votes here: 2168# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2169# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2170# </a> 2171# 2172# Our page: 2173# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2174# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2175# </a> 2176 2177# From Arthur David Olson (2010-01-20): 2178# The page 2179# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2180# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2181# </a> 2182# includes this text: 2183# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2184# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2185# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2186# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2187# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2188# horas del primer domingo de noviembre. 2189# En los municipios fronterizos que se encuentren ubicados en la franja 2190# fronteriza norte en el territorio comprendido entre la línea 2191# internacional y la línea paralela ubicada a una distancia de veinte 2192# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2193# interior del país, la aplicación de este horario estacional surtirá 2194# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2195# las dos horas del primer domingo de noviembre. 2196 2197# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2198Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2199Rule Mexico 1939 only - Jun 25 0:00 0 S 2200Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2201Rule Mexico 1941 only - Apr 1 0:00 0 S 2202Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2203Rule Mexico 1944 only - May 1 0:00 0 S 2204Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2205Rule Mexico 1950 only - Jul 30 0:00 0 S 2206Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2207Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2208Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2209Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2210Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2211Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2212# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2213# Quintana Roo 2214Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2215 -6:00 - CST 1981 Dec 23 2216 -5:00 Mexico E%sT 1998 Aug 2 2:00 2217 -6:00 Mexico C%sT 2218# Campeche, Yucatan 2219Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2220 -6:00 - CST 1981 Dec 23 2221 -5:00 - EST 1982 Dec 2 2222 -6:00 Mexico C%sT 2223# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2224Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2225 -6:00 - CST 1988 2226 -6:00 US C%sT 1989 2227 -6:00 Mexico C%sT 2010 2228 -6:00 US C%sT 2229# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 2230Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2231 -6:00 - CST 1988 2232 -6:00 US C%sT 1989 2233 -6:00 Mexico C%sT 2234# Central Mexico 2235Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2236 -7:00 - MST 1927 Jun 10 23:00 2237 -6:00 - CST 1930 Nov 15 2238 -7:00 - MST 1931 May 1 23:00 2239 -6:00 - CST 1931 Oct 2240 -7:00 - MST 1932 Apr 1 2241 -6:00 Mexico C%sT 2001 Sep 30 02:00 2242 -6:00 - CST 2002 Feb 20 2243 -6:00 Mexico C%sT 2244# Chihuahua (near US border) 2245Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2246 -7:00 - MST 1927 Jun 10 23:00 2247 -6:00 - CST 1930 Nov 15 2248 -7:00 - MST 1931 May 1 23:00 2249 -6:00 - CST 1931 Oct 2250 -7:00 - MST 1932 Apr 1 2251 -6:00 - CST 1996 2252 -6:00 Mexico C%sT 1998 2253 -6:00 - CST 1998 Apr Sun>=1 3:00 2254 -7:00 Mexico M%sT 2010 2255 -7:00 US M%sT 2256# Chihuahua (away from US border) 2257Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2258 -7:00 - MST 1927 Jun 10 23:00 2259 -6:00 - CST 1930 Nov 15 2260 -7:00 - MST 1931 May 1 23:00 2261 -6:00 - CST 1931 Oct 2262 -7:00 - MST 1932 Apr 1 2263 -6:00 - CST 1996 2264 -6:00 Mexico C%sT 1998 2265 -6:00 - CST 1998 Apr Sun>=1 3:00 2266 -7:00 Mexico M%sT 2267# Sonora 2268Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2269 -7:00 - MST 1927 Jun 10 23:00 2270 -6:00 - CST 1930 Nov 15 2271 -7:00 - MST 1931 May 1 23:00 2272 -6:00 - CST 1931 Oct 2273 -7:00 - MST 1932 Apr 1 2274 -6:00 - CST 1942 Apr 24 2275 -7:00 - MST 1949 Jan 14 2276 -8:00 - PST 1970 2277 -7:00 Mexico M%sT 1999 2278 -7:00 - MST 2279 2280# From Alexander Krivenyshev (2010-04-21): 2281# According to news, Bahía de Banderas (Mexican state of Nayarit) 2282# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2283# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2284# 2285# (Spanish) 2286# Bahía de Banderas homologa su horario al del centro del 2287# país, a partir de este domingo 2288# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2289# http://www.nayarit.gob.mx/notes.asp?id=20748 2290# </a> 2291# 2292# Bahía de Banderas homologa su horario con el del Centro del 2293# País 2294# <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"> 2295# 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" 2296# </a> 2297# 2298# (English) 2299# Puerto Vallarta and Bahía de Banderas: One Time Zone 2300# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2301# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2302# </a> 2303# 2304# or 2305# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2306# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2307# </a> 2308# 2309# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2310# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2311# zone ..." 2312# Baja California Sur, Nayarit, Sinaloa 2313 2314# From Arthur David Olson (2010-05-01): 2315# Use "Bahia_Banderas" to keep the name to fourteen characters. 2316 2317Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2318 -7:00 - MST 1927 Jun 10 23:00 2319 -6:00 - CST 1930 Nov 15 2320 -7:00 - MST 1931 May 1 23:00 2321 -6:00 - CST 1931 Oct 2322 -7:00 - MST 1932 Apr 1 2323 -6:00 - CST 1942 Apr 24 2324 -7:00 - MST 1949 Jan 14 2325 -8:00 - PST 1970 2326 -7:00 Mexico M%sT 2327 2328Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2329 -7:00 - MST 1927 Jun 10 23:00 2330 -6:00 - CST 1930 Nov 15 2331 -7:00 - MST 1931 May 1 23:00 2332 -6:00 - CST 1931 Oct 2333 -7:00 - MST 1932 Apr 1 2334 -6:00 - CST 1942 Apr 24 2335 -7:00 - MST 1949 Jan 14 2336 -8:00 - PST 1970 2337 -7:00 Mexico M%sT 2010 Apr 4 2:00 2338 -6:00 Mexico C%sT 2339 2340# Baja California (near US border) 2341Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2342 -7:00 - MST 1924 2343 -8:00 - PST 1927 Jun 10 23:00 2344 -7:00 - MST 1930 Nov 15 2345 -8:00 - PST 1931 Apr 1 2346 -8:00 1:00 PDT 1931 Sep 30 2347 -8:00 - PST 1942 Apr 24 2348 -8:00 1:00 PWT 1945 Aug 14 23:00u 2349 -8:00 1:00 PPT 1945 Nov 12 # Peace 2350 -8:00 - PST 1948 Apr 5 2351 -8:00 1:00 PDT 1949 Jan 14 2352 -8:00 - PST 1954 2353 -8:00 CA P%sT 1961 2354 -8:00 - PST 1976 2355 -8:00 US P%sT 1996 2356 -8:00 Mexico P%sT 2001 2357 -8:00 US P%sT 2002 Feb 20 2358 -8:00 Mexico P%sT 2010 2359 -8:00 US P%sT 2360# Baja California (away from US border) 2361Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2362 -7:00 - MST 1924 2363 -8:00 - PST 1927 Jun 10 23:00 2364 -7:00 - MST 1930 Nov 15 2365 -8:00 - PST 1931 Apr 1 2366 -8:00 1:00 PDT 1931 Sep 30 2367 -8:00 - PST 1942 Apr 24 2368 -8:00 1:00 PWT 1945 Aug 14 23:00u 2369 -8:00 1:00 PPT 1945 Nov 12 # Peace 2370 -8:00 - PST 1948 Apr 5 2371 -8:00 1:00 PDT 1949 Jan 14 2372 -8:00 - PST 1954 2373 -8:00 CA P%sT 1961 2374 -8:00 - PST 1976 2375 -8:00 US P%sT 1996 2376 -8:00 Mexico P%sT 2001 2377 -8:00 US P%sT 2002 Feb 20 2378 -8:00 Mexico P%sT 2379# From Paul Eggert (2006-03-22): 2380# Formerly there was an America/Ensenada zone, which differed from 2381# America/Tijuana only in that it did not observe DST from 1976 2382# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2383# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2384# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2385# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2386# DST-observance was a town-by-town matter back then. This concerns 2387# data after 1970 so most likely there should be at least one Zone 2388# other than America/Tijuana for Baja, but it's not clear yet what its 2389# name or contents should be. 2390# 2391# Revillagigedo Is 2392# no information 2393 2394############################################################################### 2395 2396# Anguilla 2397# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2398Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 2399 -4:00 - AST 2400 2401# Antigua and Barbuda 2402# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2403Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2404 -5:00 - EST 1951 2405 -4:00 - AST 2406 2407# Bahamas 2408# 2409# From Sue Williams (2006-12-07): 2410# The Bahamas announced about a month ago that they plan to change their DST 2411# rules to sync with the U.S. starting in 2007.... 2412# http://www.jonesbahamas.com/?c=45&a=10412 2413 2414# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2415Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2416Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2417# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2418Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 2419 -5:00 Bahamas E%sT 1976 2420 -5:00 US E%sT 2421 2422# Barbados 2423# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2424Rule Barb 1977 only - Jun 12 2:00 1:00 D 2425Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2426Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2427Rule Barb 1979 only - Sep 30 2:00 0 S 2428Rule Barb 1980 only - Sep 25 2:00 0 S 2429# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2430Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 2431 -3:58:28 - BMT 1932 # Bridgetown Mean Time 2432 -4:00 Barb A%sT 2433 2434# Belize 2435# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2436# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2437Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2438Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2439Rule Belize 1973 only - Dec 5 0:00 1:00 D 2440Rule Belize 1974 only - Feb 9 0:00 0 S 2441Rule Belize 1982 only - Dec 18 0:00 1:00 D 2442Rule Belize 1983 only - Feb 12 0:00 0 S 2443# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2444Zone America/Belize -5:52:48 - LMT 1912 Apr 2445 -6:00 Belize C%sT 2446 2447# Bermuda 2448 2449# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2450 2451# Next year, however, clocks in the US will go forward on the second Sunday 2452# in March, until the first Sunday in November. And, after the Time Zone 2453# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2454# Friday, the same thing will happen in Bermuda. 2455# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2456 2457# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2458Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 2459 -4:00 - AST 1974 Apr 28 2:00 2460 -4:00 Bahamas A%sT 1976 2461 -4:00 US A%sT 2462 2463# Cayman Is 2464# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2465Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2466 -5:07:12 - KMT 1912 Feb # Kingston Mean Time 2467 -5:00 - EST 2468 2469# Costa Rica 2470# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2471Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2472Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2473Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2474# IATA SSIM (1991-09) says the following was at 1:00; 2475# go with Shanks & Pottenger. 2476Rule CR 1991 only - Jul 1 0:00 0 S 2477Rule CR 1992 only - Mar 15 0:00 0 S 2478# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 2479# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2480Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 2481 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 2482 -6:00 CR C%sT 2483# Coco 2484# no information; probably like America/Costa_Rica 2485 2486# Cuba 2487 2488# From Arthur David Olson (1999-03-29): 2489# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2490# the Cuban National Team and the Baltimore Orioles was carried live on 2491# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2492# During the game, play-by-play announcer Jim Hunter noted that 2493# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2494# Time today." (The "two hour" remark referred to losing one hour of 2495# sleep on 1999-03-28--when the announcers were in Cuba as it switched 2496# to DST--and one more hour on 1999-04-04--when the announcers will have 2497# returned to Baltimore, which switches on that date.) 2498 2499# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2500# Cuba is not going back to standard time this year. 2501# From Paul Eggert (2006-03-22): 2502# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2503# says that it's due to a problem at the Antonio Guiteras 2504# thermoelectric plant, and says "This October there will be no return 2505# to normal hours (after daylight saving time)". 2506# For now, let's assume that it's a temporary measure. 2507 2508# From Carlos A. Carnero Delgado (2005-11-12): 2509# This year (just like in 2004-2005) there's no change in time zone 2510# adjustment in Cuba. We will stay in daylight saving time: 2511# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2512 2513# From Jesper Norgaard Welen (2006-10-21): 2514# An article in GRANMA INTERNACIONAL claims that Cuba will end 2515# the 3 years of permanent DST next weekend, see 2516# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2517# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2518# watches should be set back one hour -- going back to 00:00 hours -- returning 2519# to the normal schedule.... 2520 2521# From Paul Eggert (2007-03-02): 2522# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2523# says Cuban clocks will advance at midnight on March 10. 2524# For lack of better information, assume Cuba will use US rules, 2525# except that it switches at midnight standard time as usual. 2526# 2527# From Steffen Thorsen (2007-10-25): 2528# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2529# earlier - on the last Sunday of October, just like in 2006. 2530# 2531# He supplied these references: 2532# 2533# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2534# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2535# 2536# From Alex Kryvenishev (2007-10-25): 2537# Here is also article from Granma (Cuba): 2538# 2539# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2540# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2541# 2542# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2543 2544# From Arthur David Olson (2008-03-09): 2545# I'm in Maryland which is now observing United States Eastern Daylight 2546# Time. At 9:44 local time I used RealPlayer to listen to 2547# <a href="http://media.enet.cu/radioreloj"> 2548# http://media.enet.cu/radioreloj 2549# </a>, a Cuban information station, and heard 2550# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2551# indicating that Cuba is still on standard time. 2552 2553# From Steffen Thorsen (2008-03-12): 2554# It seems that Cuba will start DST on Sunday, 2007-03-16... 2555# It was announced yesterday, according to this source (in Spanish): 2556# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2557# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2558# </a> 2559# 2560# Some more background information is posted here: 2561# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2562# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2563# </a> 2564# 2565# The article also says that Cuba has been observing DST since 1963, 2566# while Shanks (and tzdata) has 1965 as the first date (except in the 2567# 1940's). Many other web pages in Cuba also claim that it has been 2568# observed since 1963, but with the exception of 1970 - an exception 2569# which is not present in tzdata/Shanks. So there is a chance we need to 2570# change some historic records as well. 2571# 2572# One example: 2573# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2574# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2575# </a> 2576 2577# From Jesper Norgaard Welen (2008-03-13): 2578# The Cuban time change has just been confirmed on the most authoritative 2579# web site, the Granma. Please check out 2580# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2581# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2582# </a> 2583# 2584# Basically as expected after Steffen Thorsens information, the change 2585# will take place midnight between Saturday and Sunday. 2586 2587# From Arthur David Olson (2008-03-12): 2588# Assume Sun>=15 (third Sunday) going forward. 2589 2590# From Alexander Krivenyshev (2009-03-04) 2591# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2592# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2593# not on midnight March 14 / March 15 as previously thought. 2594# 2595# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2596# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2597# (in Spanish) 2598# </a> 2599 2600# From Arthur David Olson (2009-03-09) 2601# I listened over the Internet to 2602# <a href="http://media.enet.cu/readioreloj"> 2603# http://media.enet.cu/readioreloj 2604# </a> 2605# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2606# the time was announced as "diez cinco"--the same time as here, indicating 2607# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2608
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