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