1 # 2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # 4 # This code is free software; you can redistribute it and/or modify it 5 # under the terms of the GNU General Public License version 2 only, as 6 # published by the Free Software Foundation. Oracle designates this 7 # particular file as subject to the "Classpath" exception as provided 8 # by Oracle in the LICENSE file that accompanied this code. 9 # 10 # This code is distributed in the hope that it will be useful, but WITHOUT 11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 # version 2 for more details (a copy is included in the LICENSE file that 14 # accompanied this code). 15 # 16 # You should have received a copy of the GNU General Public License version 17 # 2 along with this work; if not, write to the Free Software Foundation, 18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 # 20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 # or visit www.oracle.com if you need additional information or have any 22 # questions. 23 # 24 # This file is in the public domain, so clarified as of 25 # 2009-05-17 by Arthur David Olson. 26 27 # also includes Central America and the Caribbean 28 29 # This file is by no means authoritative; if you think you know better, 30 # go ahead and edit the file (and please send any changes to 31 # tz@iana.org for general use in the future). For more, please see 32 # the file CONTRIBUTING in the tz distribution. 33 34 # From Paul Eggert (1999-03-22): 35 # A reliable and entertaining source about time zones is 36 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38 ############################################################################### 39 40 # United States 41 42 # From Paul Eggert (1999-03-31): 43 # Howse writes (pp 121-125) that time zones were invented by 44 # Professor Charles Ferdinand Dowd (1825-1904), 45 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46 # His pamphlet "A System of National Time for Railroads" (1870) 47 # was the result of his proposals at the Convention of Railroad Trunk Lines 48 # in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49 # but in 1872-05 he moved the proposed origin to Greenwich. 50 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, 51 # and the most of the country soon followed suit. 52 53 # From Paul Eggert (2005-04-16): 54 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 55 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 56 57 # From Paul Eggert (2006-03-22): 58 # A good source for time zone historical data in the US is 59 # Thomas G. Shanks, The American Atlas (5th edition), 60 # San Diego: ACS Publications, Inc. (1991). 61 # Make sure you have the errata sheet; the book is somewhat useless without it. 62 # It is the source for most of the pre-1991 US entries below. 63 64 # From Paul Eggert (2001-03-06): 65 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 66 # in his whimsical essay "An Economical Project for Diminishing the Cost 67 # of Light" published in the Journal de Paris (1784-04-26). 68 # Not everyone is happy with the results: 69 # 70 # I don't really care how time is reckoned so long as there is some 71 # agreement about it, but I object to being told that I am saving 72 # daylight when my reason tells me that I am doing nothing of the kind. 73 # I even object to the implication that I am wasting something 74 # valuable if I stay in bed after the sun has risen. As an admirer 75 # of moonlight I resent the bossy insistence of those who want to 76 # reduce my time for enjoying it. At the back of the Daylight Saving 77 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 78 # to push people into bed earlier, and get them up earlier, to make 79 # them healthy, wealthy and wise in spite of themselves. 80 # 81 # -- Robertson Davies, The diary of Samuel Marchbanks, 82 # Clarke, Irwin (1947), XIX, Sunday 83 # 84 # For more about the first ten years of DST in the United States, see 85 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 86 # (Carnegie Library of Pittsburgh, 1927). 87 # http://www.clpgh.org/exhibit/dst.html 88 # 89 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 90 # However, DST was imposed by the Standard Time Act of 1918, which 91 # was the first nationwide legal time standard, and apparently 92 # time was just called "Standard Time" or "Daylight Saving Time". 93 94 # From Arthur David Olson: 95 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 96 # See, for example, the front page of the Saturday, 1974-10-26 97 # and Sunday, 1974-10-27 editions of the Washington Post. 98 99 # From Arthur David Olson: 100 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 101 # Daylight Saving Time in the US was by local option, except during wartime. 102 103 # From Arthur David Olson (2000-09-25): 104 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 105 # In the introduction, Oboler spoke of "Eastern Peace Time." 106 # An AltaVista search turned up: 107 # http://rowayton.org/rhs/hstaug45.html 108 # "When the time is announced over the radio now, it is 'Eastern Peace 109 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 110 # (August 1945) by way of confirmation. 111 112 # From Joseph Gallant citing 113 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 114 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 115 # to switch to London for Attlee's address, but the American people 116 # never got to hear his speech live. According to one press account, 117 # CBS' Bob Trout was first to announce the word of Japan's surrender, 118 # but a few seconds later, NBC, ABC and Mutual also flashed the word 119 # of surrender, all of whom interrupting the bells of Big Ben in 120 # London which were to precede Mr. Attlee's speech. 121 122 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 123 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 124 # 125 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 126 # Any announcement from Asia would reach St. John's New York newsroom on a 127 # wire service teletype machine, which had prescribed signals for major news. 128 # Associated Press, for example, would ring five bells before spewing out 129 # typed copy of an important story, and 10 bells for news "of transcendental 130 # importance." 131 # 132 # On Aug. 14, stalling while talking steadily into the NBC networks' open 133 # microphone, St. John heard five bells and waited only to hear a sixth bell, 134 # before announcing confidently: "Ladies and gentlemen, World War II is over. 135 # The Japanese have agreed to our surrender terms." 136 # 137 # He had scored a 20-second scoop on other broadcasters. 138 139 # From Arthur David Olson (2005-08-22): 140 # Paul has been careful to use the "US" rules only in those locations 141 # that are part of the United States; this reflects the real scope of 142 # U.S. government action. So even though the "US" rules have changed 143 # in the latest release, other countries won't be affected. 144 145 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 146 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 147 Rule US 1918 1919 - Oct lastSun 2:00 0 S 148 Rule US 1942 only - Feb 9 2:00 1:00 W # War 149 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 150 Rule US 1945 only - Sep lastSun 2:00 0 S 151 Rule US 1967 2006 - Oct lastSun 2:00 0 S 152 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 153 Rule US 1974 only - Jan 6 2:00 1:00 D 154 Rule US 1975 only - Feb 23 2:00 1:00 D 155 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 156 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 157 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 158 Rule US 2007 max - Nov Sun>=1 2:00 0 S 159 160 # From Arthur David Olson, 2005-12-19 161 # We generate the files specified below to guard against old files with 162 # obsolete information being left in the time zone binary directory. 163 # We limit the list to names that have appeared in previous versions of 164 # this time zone package. 165 # We do these as separate Zones rather than as Links to avoid problems if 166 # a particular place changes whether it observes DST. 167 # We put these specifications here in the northamerica file both to 168 # increase the chances that they'll actually get compiled and to 169 # avoid the need to duplicate the US rules in another file. 170 171 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 172 Zone EST -5:00 - EST 173 Zone MST -7:00 - MST 174 Zone HST -10:00 - HST 175 Zone EST5EDT -5:00 US E%sT 176 Zone CST6CDT -6:00 US C%sT 177 Zone MST7MDT -7:00 US M%sT 178 Zone PST8PDT -8:00 US P%sT 179 180 # From Bob Devine (1988-01-28): 181 # ...Alaska (and Hawaii) had the timezone names changed in 1967. 182 # old new 183 # Pacific Standard Time(PST) -same- 184 # Yukon Standard Time(YST) -same- 185 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 186 # Nome Standard Time (NT) Bering Standard Time (BST) 187 # 188 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 189 # The YST zone now covers nearly all of the state, AHST just part 190 # of the Aleutian islands. No DST. 191 192 # From Paul Eggert (1995-12-19): 193 # The tables below use 'NST', not 'NT', for Nome Standard Time. 194 # I invented 'CAWT' for Central Alaska War Time. 195 196 # From U. S. Naval Observatory (1989-01-19): 197 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 198 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 199 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 200 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 201 # USA MOUNTAIN 7 H BEHIND UTC DENVER 202 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 203 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 204 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 205 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 206 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 207 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 208 # USA " 9 H BEHIND UTC APR 3 - OCT 30 209 # USA HAWAII 10 H BEHIND UTC 210 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 211 212 # From Arthur David Olson (1989-01-21): 213 # The above dates are for 1988. 214 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 215 # no DST in Samoa, and the claim that there is DST in Alaska and the 216 # Aleutians. 217 218 # From Arthur David Olson (1988-02-13): 219 # Legal standard time zone names, from United States Code (1982 Edition and 220 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 221 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 222 # took effect), as explained in sections 263 and 261: 223 # (none) 224 # United States standard eastern time 225 # United States standard mountain time 226 # United States standard central time 227 # United States standard Pacific time 228 # (none) 229 # United States standard Alaska time 230 # (none) 231 # Next, names from 1967-04-01 until 1983-11-30 (the date for 232 # public law 98-181): 233 # Atlantic standard time 234 # eastern standard time 235 # central standard time 236 # mountain standard time 237 # Pacific standard time 238 # Yukon standard time 239 # Alaska-Hawaii standard time 240 # Bering standard time 241 # And after 1983-11-30: 242 # Atlantic standard time 243 # eastern standard time 244 # central standard time 245 # mountain standard time 246 # Pacific standard time 247 # Alaska standard time 248 # Hawaii-Aleutian standard time 249 # Samoa standard time 250 # The law doesn't give abbreviations. 251 # 252 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 253 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 254 # for time in Guam and the Northern Marianas. See the file "australasia". 255 # 256 # From Paul Eggert (2015-04-17): 257 # HST and HDT are standardized abbreviations for Hawaii-Aleutian 258 # standard and daylight times. See section 9.47 (p 234) of the 259 # U.S. Government Printing Office Style Manual (2008) 260 # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 261 262 # From Arthur David Olson, 2005-08-09 263 # The following was signed into law on 2005-08-08. 264 # 265 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 266 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 267 # U.S.C. 260a(a)) is amended-- 268 # (1) by striking "first Sunday of April" and inserting "second 269 # Sunday of March"; and 270 # (2) by striking "last Sunday of October" and inserting "first 271 # Sunday of November'. 272 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the 273 # date of enactment of this Act or March 1, 2007, whichever is later. 274 # (c) Report to Congress.--Not later than 9 months after the effective 275 # date stated in subsection (b), the Secretary shall report to Congress 276 # on the impact of this section on energy consumption in the United 277 # States. 278 # (d) Right to Revert.--Congress retains the right to revert the 279 # Daylight Saving Time back to the 2005 time schedules once the 280 # Department study is complete. 281 282 # US eastern time, represented by New York 283 284 # Connecticut, Delaware, District of Columbia, most of Florida, 285 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 286 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 287 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 288 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 289 # Vermont, Virginia, West Virginia 290 291 # From Dave Cantor (2004-11-02): 292 # Early this summer I had the occasion to visit the Mount Washington 293 # Observatory weather station atop (of course!) Mount Washington [, NH].... 294 # One of the staff members said that the station was on Eastern Standard Time 295 # and didn't change their clocks for Daylight Saving ... so that their 296 # reports will always have times which are 5 hours behind UTC. 297 298 # From Paul Eggert (2005-08-26): 299 # According to today's Huntsville Times 300 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 301 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 302 # in Russell County, Lanett in Chambers County and some towns in Lee County, 303 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 304 # Roberts, city administrator in Phenix City. as saying "We are in the Central 305 # time zone, but we do go by the Eastern time zone because so many people work 306 # in Columbus." 307 308 # From Paul Eggert (2014-09-06): 309 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 310 # says that New York City Hall time was 3 minutes 58.4 seconds fast of 311 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 312 # nearest second. 313 314 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 315 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 316 Rule NYC 1920 only - Oct lastSun 2:00 0 S 317 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 318 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 319 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 320 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 321 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 322 -5:00 US E%sT 1920 323 -5:00 NYC E%sT 1942 324 -5:00 US E%sT 1946 325 -5:00 NYC E%sT 1967 326 -5:00 US E%sT 327 328 # US central time, represented by Chicago 329 330 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 331 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 332 # Washington counties), Illinois, western Indiana 333 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 334 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 335 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 336 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 337 # western Tennessee, most of Texas, Wisconsin 338 339 # From Larry M. Smith (2006-04-26) re Wisconsin: 340 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 341 # is currently enforced at the 01:00 time of change. Because the local 342 # "bar time" in the state corresponds to 02:00, a number of citations 343 # are issued for the "sale of class 'B' alcohol after prohibited 344 # hours" within the deviated hour of this change every year.... 345 # 346 # From Douglas R. Bomberg (2007-03-12): 347 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 348 # Statue 175 closer in synch with the US Congress' intent.... 349 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 350 351 # From an email administrator of the City of Fort Pierre, SD (2015-12-21): 352 # Fort Pierre is technically located in the Mountain time zone as is 353 # the rest of Stanley County. Most of Stanley County and Fort Pierre 354 # uses the Central time zone due to doing most of their business in 355 # Pierre so it simplifies schedules. I have lived in Stanley County 356 # all my life and it has been that way since I can remember. (43 years!) 357 # 358 # From Paul Eggert (2015-12-25): 359 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 360 361 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 362 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 363 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 364 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 365 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 366 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 367 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 368 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 369 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 370 -6:00 US C%sT 1920 371 -6:00 Chicago C%sT 1936 Mar 1 2:00 372 -5:00 - EST 1936 Nov 15 2:00 373 -6:00 Chicago C%sT 1942 374 -6:00 US C%sT 1946 375 -6:00 Chicago C%sT 1967 376 -6:00 US C%sT 377 # Oliver County, ND switched from mountain to central time on 1992-10-25. 378 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 379 -7:00 US M%sT 1992 Oct 25 2:00 380 -6:00 US C%sT 381 # Morton County, ND, switched from mountain to central time on 382 # 2003-10-26, except for the area around Mandan which was already central time. 383 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 384 # Officially this switch also included part of Sioux County, and 385 # Jones, Mellette, and Todd Counties in South Dakota; 386 # but in practice these other counties were already observing central time. 387 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 388 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 389 -7:00 US M%sT 2003 Oct 26 2:00 390 -6:00 US C%sT 391 392 # From Josh Findley (2011-01-21): 393 # ...it appears that Mercer County, North Dakota, changed from the 394 # mountain time zone to the central time zone at the last transition from 395 # daylight-saving to standard time (on Nov. 7, 2010): 396 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 397 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 398 399 # From Andy Lipscomb (2011-01-24): 400 # ...according to the Census Bureau, the largest city is Beulah (although 401 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 402 # largest city in Mercer County). Google Maps places Beulah's city hall 403 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 404 # of 6h47'07". 405 406 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 407 -7:00 US M%sT 2010 Nov 7 2:00 408 -6:00 US C%sT 409 410 # US mountain time, represented by Denver 411 # 412 # Colorado, far western Kansas, Montana, western 413 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 414 # New Mexico, southwestern North Dakota, 415 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 416 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 417 # 418 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 419 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 420 Rule Denver 1920 only - Oct lastSun 2:00 0 S 421 Rule Denver 1921 only - May 22 2:00 0 S 422 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 423 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 424 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 425 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 426 -7:00 US M%sT 1920 427 -7:00 Denver M%sT 1942 428 -7:00 US M%sT 1946 429 -7:00 Denver M%sT 1967 430 -7:00 US M%sT 431 432 # US Pacific time, represented by Los Angeles 433 # 434 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 435 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 436 # north of the Salmon River, and the towns of Burgdorf and Warren), 437 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 438 # Malheur county), and Washington 439 440 # From Paul Eggert (2016-08-20): 441 # In early February 1948, in response to California's electricity shortage, 442 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 443 # causing electric clocks to lose six minutes per day. (This did not change 444 # legal time, and is not part of the data here.) See: 445 # Ross SA. An energy crisis from the past: Northern California in 1948. 446 # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 447 # 1973-11. http://escholarship.org/uc/item/8x22k30c 448 # 449 # In another measure to save electricity, DST was instituted from 1948-03-14 450 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 451 # the fallback transition earlier. See pages 3-4 of: 452 # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 453 # 454 # In response: 455 # 456 # Governor Warren received a torrent of objecting mail, and it is not too much 457 # to speculate that the objections to Daylight Saving Time were one important 458 # factor in the defeat of the Dewey-Warren Presidential ticket in California. 459 # -- Ross, p 25 460 # 461 # On December 8 the governor exercised the option, setting the date to January 1 462 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 463 # 464 # Despite the controversy, in 1949 California voters approved Proposition 12, 465 # which established DST from April's last Sunday at 01:00 until September's 466 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 467 # the fall-back date to October's last Sunday. See: 468 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 469 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 470 # 471 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 472 Rule CA 1948 only - Mar 14 2:01 1:00 D 473 Rule CA 1949 only - Jan 1 2:00 0 S 474 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D 475 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 476 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 477 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 478 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 479 -8:00 US P%sT 1946 480 -8:00 CA P%sT 1967 481 -8:00 US P%sT 482 483 # Alaska 484 # AK%sT is the modern abbreviation for -9:00 per USNO. 485 # 486 # From Paul Eggert (2001-05-30): 487 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 488 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 489 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 490 # also a Friday. Include only the time zone part of this transition, 491 # ignoring the switch from Julian to Gregorian, since we can't represent 492 # the Julian calendar. 493 # 494 # As far as we know, none of the exact locations mentioned below were 495 # permanently inhabited in 1867 by anyone using either calendar. 496 # (Yakutat was colonized by the Russians in 1799, but the settlement 497 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 498 # were nearby inhabitants in some cases and for our purposes perhaps 499 # it's best to simply use the official transition. 500 501 # From Paul Eggert (2014-07-18): 502 # One opinion of the early-1980s turmoil in Alaska over time zones and 503 # daylight saving time appeared as graffiti on a Juneau airport wall: 504 # "Welcome to Juneau. Please turn your watch back to the 19th century." 505 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 506 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 507 # 508 # Steve Ferguson (2011-01-31) referred to the following source: 509 # Norris F. Keeping time in Alaska: national directives, local response. 510 # Alaska History 2001;16(1-2). 511 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 512 513 # From Arthur David Olson (2011-02-01): 514 # Here's database-relevant material from the 2001 "Alaska History" article: 515 # 516 # On September 20 [1979]...DOT...officials decreed that on April 27, 517 # 1980, Juneau and other nearby communities would move to Yukon Time. 518 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 519 # Pacific Time. 520 # 521 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 522 # Department's September 1979 decision. Juneau and other communities in 523 # northern Southeast reverted to Pacific Time on October 26. 524 # 525 # On October 28 [1983]...the Metlakatla Indian Community Council voted 526 # unanimously to keep the reservation on Pacific Time. 527 # 528 # According to DOT official Joanne Petrie, Indian reservations are not 529 # bound to follow time zones imposed by neighboring jurisdictions. 530 # 531 # (The last is consistent with how the database now handles the Navajo 532 # Nation.) 533 534 # From Arthur David Olson (2011-02-09): 535 # I just spoke by phone with a staff member at the Metlakatla Indian 536 # Community office (using contact information available at 537 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 538 # It's shortly after 1:00 here on the east coast of the United States; 539 # the staffer said it was shortly after 10:00 there. When I asked whether 540 # that meant they were on Pacific time, they said no - they were on their 541 # own time. I asked about daylight saving; they said it wasn't used. I 542 # did not inquire about practices in the past. 543 544 # From Arthur David Olson (2011-08-17): 545 # For lack of better information, assume that Metlakatla's 546 # abandonment of use of daylight saving resulted from the 1983 vote. 547 548 # From Steffen Thorsen (2015-11-09): 549 # It seems Metlakatla did go off PST on Sunday, November 1, changing 550 # their time to AKST and are going to follow Alaska's DST, switching 551 # between AKST and AKDT from now on.... 552 # http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 553 554 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 555 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 556 -8:57:41 - LMT 1900 Aug 20 12:00 557 -8:00 - PST 1942 558 -8:00 US P%sT 1946 559 -8:00 - PST 1969 560 -8:00 US P%sT 1980 Apr 27 2:00 561 -9:00 US Y%sT 1980 Oct 26 2:00 562 -8:00 US P%sT 1983 Oct 30 2:00 563 -9:00 US Y%sT 1983 Nov 30 564 -9:00 US AK%sT 565 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 566 -9:01:13 - LMT 1900 Aug 20 12:00 567 -8:00 - PST 1942 568 -8:00 US P%sT 1946 569 -8:00 - PST 1969 570 -8:00 US P%sT 1983 Oct 30 2:00 571 -9:00 US Y%sT 1983 Nov 30 572 -9:00 US AK%sT 573 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 574 -8:46:18 - LMT 1900 Aug 20 12:00 575 -8:00 - PST 1942 576 -8:00 US P%sT 1946 577 -8:00 - PST 1969 578 -8:00 US P%sT 1983 Oct 30 2:00 579 -8:00 - PST 2015 Nov 1 2:00 580 -9:00 US AK%sT 581 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 582 -9:18:55 - LMT 1900 Aug 20 12:00 583 -9:00 - YST 1942 584 -9:00 US Y%sT 1946 585 -9:00 - YST 1969 586 -9:00 US Y%sT 1983 Nov 30 587 -9:00 US AK%sT 588 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 589 -9:59:36 - LMT 1900 Aug 20 12:00 590 -10:00 - CAT 1942 591 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 592 -10:00 US CAT/CAPT 1946 # Peace 593 -10:00 - CAT 1967 Apr 594 -10:00 - AHST 1969 595 -10:00 US AH%sT 1983 Oct 30 2:00 596 -9:00 US Y%sT 1983 Nov 30 597 -9:00 US AK%sT 598 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 599 -11:01:38 - LMT 1900 Aug 20 12:00 600 -11:00 - NST 1942 601 -11:00 US N%sT 1946 602 -11:00 - NST 1967 Apr 603 -11:00 - BST 1969 604 -11:00 US B%sT 1983 Oct 30 2:00 605 -9:00 US Y%sT 1983 Nov 30 606 -9:00 US AK%sT 607 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 608 -11:46:38 - LMT 1900 Aug 20 12:00 609 -11:00 - NST 1942 610 -11:00 US N%sT 1946 611 -11:00 - NST 1967 Apr 612 -11:00 - BST 1969 613 -11:00 US B%sT 1983 Oct 30 2:00 614 -10:00 US AH%sT 1983 Nov 30 615 -10:00 US H%sT 616 # The following switches don't quite make our 1970 cutoff. 617 # 618 # Shanks writes that part of southwest Alaska (e.g. Aniak) 619 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 620 # and another part (e.g. Akiak) made the same switch five weeks later. 621 # 622 # From David Flater (2004-11-09): 623 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 624 # Historic Preservation Commission, provided this information, which 625 # suggests that Unalaska deviated from statutory time from early 1967 626 # possibly until 1983: 627 # 628 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 629 # "Except for St. Paul and Akutan, Unalaska is the only important 630 # location not on Alaska Standard Time. The following resolution was 631 # made by William Robinson and seconded by Henry Swanson: Be it 632 # resolved that the City of Unalaska hereby goes to Alaska Standard 633 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 634 # January 14, Alaska Standard Time.) This resolution was passed with 635 # three votes for and one against." 636 637 # Hawaii 638 639 # From Arthur David Olson (2010-12-09): 640 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 641 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 642 # the article is available at 643 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 644 # and indicates that standard time was adopted effective noon, January 645 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 646 # saving for the period between the last Sunday of each April and the 647 # last Sunday of each September, but less than a month later repealed the 648 # act," (page 220), that year-round daylight saving time was in effect 649 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 650 # when clocks changed) and that clocks were changed by 30 minutes 651 # effective the second Sunday of June, 1947 (page 219, with no time of 652 # day given for when clocks changed). A footnote for the 1933 changes 653 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 654 # and Act 163 (approved 21 May 1933)." 655 656 # From Arthur David Olson (2011-01-19): 657 # The following is from "Laws of the Territory of Hawaii Passed by the 658 # Seventeenth Legislature: Regular Session 1933," available (as of 659 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 660 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 661 # year, the standard time of this Territory shall be advanced one 662 # hour...This Act shall take effect upon its approval. Approved this 26th 663 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 664 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 665 # hereby repealed...This Act shall take effect upon its approval, upon 666 # which date the standard time of this Territory shall be restored to 667 # that existing immediately prior to the taking effect of said Act 90. 668 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 669 # of the Territory of Hawaii." 670 # 671 # Note that 1933-05-21 was a Sunday. 672 # We're left to guess the time of day when Act 163 was approved; guess noon. 673 674 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 675 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 676 -10:30 - HST 1933 Apr 30 2:00 677 -10:30 1:00 HDT 1933 May 21 12:00 678 -10:30 - HST 1942 Feb 9 2:00 679 -10:30 1:00 HDT 1945 Sep 30 2:00 680 -10:30 - HST 1947 Jun 8 2:00 681 -10:00 - HST 682 Link Pacific/Honolulu Pacific/Johnston 683 684 # Now we turn to US areas that have diverged from the consensus since 1970. 685 686 # Arizona mostly uses MST. 687 688 # From Paul Eggert (2002-10-20): 689 # 690 # The information in the rest of this paragraph is derived from the 691 # Daylight Saving Time web page 692 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 693 # maintained by the Arizona State Library, Archives and Public Records. 694 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 695 # time, but by federal law railroads, airlines, bus lines, military 696 # personnel, and some engaged in interstate commerce continued to 697 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 698 # Gazette says that was the date the law changed, and that 04-01 was 699 # the date the state's clocks would change. In 1945 the State of 700 # Arizona used standard time all year, again with exceptions only as 701 # mandated by federal law. Arizona observed DST in 1967, but Arizona 702 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 703 # 704 # Shanks says the 1944 experiment came to an end on 1944-03-17. 705 # Go with the Arizona State Library instead. 706 707 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 708 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 709 -7:00 US M%sT 1944 Jan 1 0:01 710 -7:00 - MST 1944 Apr 1 0:01 711 -7:00 US M%sT 1944 Oct 1 0:01 712 -7:00 - MST 1967 713 -7:00 US M%sT 1968 Mar 21 714 -7:00 - MST 715 # From Arthur David Olson (1988-02-13): 716 # A writer from the Inter Tribal Council of Arizona, Inc., 717 # notes in private correspondence dated 1987-12-28 that "Presently, only the 718 # Navajo Nation participates in the Daylight Saving Time policy, due to its 719 # large size and location in three states." (The "only" means that other 720 # tribal nations don't use DST.) 721 # 722 # From Paul Eggert (2013-08-26): 723 # See America/Denver for a zone appropriate for the Navajo Nation. 724 725 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 726 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 727 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 728 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 729 # Teton, Twin Falls, Valley, Washington counties, and the southern 730 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 731 # switched four weeks late in 1974. 732 # 733 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 734 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 735 -8:00 US P%sT 1923 May 13 2:00 736 -7:00 US M%sT 1974 737 -7:00 - MST 1974 Feb 3 2:00 738 -7:00 US M%sT 739 740 # Indiana 741 # 742 # For a map of Indiana's time zone regions, see: 743 # http://en.wikipedia.org/wiki/Time_in_Indiana 744 # 745 # From Paul Eggert (2007-08-17): 746 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 747 # with the following exceptions: 748 # 749 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 750 # Vanderburgh, and Warrick counties have been like America/Chicago. 751 # 752 # - Dearborn and Ohio counties have been like America/New_York. 753 # 754 # - Clark, Floyd, and Harrison counties have been like 755 # America/Kentucky/Louisville. 756 # 757 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 758 # and Switzerland counties have their own time zone histories as noted below. 759 # 760 # Shanks partitioned Indiana into 345 regions, each with its own time history, 761 # and wrote "Even newspaper reports present contradictory information." 762 # Those Hoosiers! Such a flighty and changeable people! 763 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 764 # 765 # Other than Indianapolis, the Indiana place names are so nondescript 766 # that they would be ambiguous if we left them at the 'America' level. 767 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 768 769 # From Paul Eggert (2014-06-26): 770 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 771 # says "DOT is relocating the time zone boundary in Indiana to move Starke, 772 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 773 # Eastern Time Zone to the Central Time Zone.... The effective date of 774 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 775 # changeover date from standard time to Daylight Saving Time." 776 # Strictly speaking, this meant the affected counties changed their 777 # clocks twice that night, but this obviously was in error. The intent 778 # was that 01:59:59 EST be followed by 02:00:00 CDT. 779 780 # From Gwillim Law (2007-02-10): 781 # The Associated Press has been reporting that Pulaski County, Indiana is 782 # going to switch from Central to Eastern Time on March 11, 2007.... 783 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 784 785 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 786 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 787 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 788 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 789 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 790 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 791 -6:00 US C%sT 1920 792 -6:00 Indianapolis C%sT 1942 793 -6:00 US C%sT 1946 794 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 795 -5:00 - EST 1957 Sep 29 2:00 796 -6:00 - CST 1958 Apr 27 2:00 797 -5:00 - EST 1969 798 -5:00 US E%sT 1971 799 -5:00 - EST 2006 800 -5:00 US E%sT 801 # 802 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 803 # as well as from 1976 through 2005. 804 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 805 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 806 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 807 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 808 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 809 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 810 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 811 -6:00 US C%sT 1951 812 -6:00 Marengo C%sT 1961 Apr 30 2:00 813 -5:00 - EST 1969 814 -5:00 US E%sT 1974 Jan 6 2:00 815 -6:00 1:00 CDT 1974 Oct 27 2:00 816 -5:00 US E%sT 1976 817 -5:00 - EST 2006 818 -5:00 US E%sT 819 # 820 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 821 # switched from eastern to central time in April 2006, then switched back 822 # in November 2007. 823 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 824 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 825 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 826 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 827 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 828 Rule Vincennes 1955 only - May 1 0:00 1:00 D 829 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 830 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 831 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 832 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 833 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 834 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 835 -6:00 US C%sT 1946 836 -6:00 Vincennes C%sT 1964 Apr 26 2:00 837 -5:00 - EST 1969 838 -5:00 US E%sT 1971 839 -5:00 - EST 2006 Apr 2 2:00 840 -6:00 US C%sT 2007 Nov 4 2:00 841 -5:00 US E%sT 842 # 843 # Perry County, Indiana, switched from eastern to central time in April 2006. 844 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 845 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 846 Rule Perry 1946 only - Sep lastSun 2:00 0 S 847 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 848 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 849 Rule Perry 1955 only - May 1 0:00 1:00 D 850 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 851 Rule Perry 1960 only - Oct lastSun 2:00 0 S 852 Rule Perry 1961 only - Sep lastSun 2:00 0 S 853 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 854 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 855 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 856 -6:00 US C%sT 1946 857 -6:00 Perry C%sT 1964 Apr 26 2:00 858 -5:00 - EST 1969 859 -5:00 US E%sT 1971 860 -5:00 - EST 2006 Apr 2 2:00 861 -6:00 US C%sT 862 # 863 # Pike County, Indiana moved from central to eastern time in 1977, 864 # then switched back in 2006, then switched back again in 2007. 865 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 866 Rule Pike 1955 only - May 1 0:00 1:00 D 867 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 868 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 869 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 870 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 871 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 872 -6:00 US C%sT 1955 873 -6:00 Pike C%sT 1965 Apr 25 2:00 874 -5:00 - EST 1966 Oct 30 2:00 875 -6:00 US C%sT 1977 Oct 30 2:00 876 -5:00 - EST 2006 Apr 2 2:00 877 -6:00 US C%sT 2007 Nov 4 2:00 878 -5:00 US E%sT 879 # 880 # Starke County, Indiana moved from central to eastern time in 1991, 881 # then switched back in 2006. 882 # From Arthur David Olson (1991-10-28): 883 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 884 # notes that Starke County switched from Central time to Eastern time as of 885 # 1991-10-27. 886 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 887 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 888 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 889 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 890 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 891 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 892 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 893 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 894 -6:00 US C%sT 1947 895 -6:00 Starke C%sT 1962 Apr 29 2:00 896 -5:00 - EST 1963 Oct 27 2:00 897 -6:00 US C%sT 1991 Oct 27 2:00 898 -5:00 - EST 2006 Apr 2 2:00 899 -6:00 US C%sT 900 # 901 # Pulaski County, Indiana, switched from eastern to central time in 902 # April 2006 and then switched back in March 2007. 903 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 904 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 905 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 906 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 907 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 908 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 909 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 910 -6:00 US C%sT 1946 911 -6:00 Pulaski C%sT 1961 Apr 30 2:00 912 -5:00 - EST 1969 913 -5:00 US E%sT 1971 914 -5:00 - EST 2006 Apr 2 2:00 915 -6:00 US C%sT 2007 Mar 11 2:00 916 -5:00 US E%sT 917 # 918 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 919 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 920 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 921 -6:00 US C%sT 1954 Apr 25 2:00 922 -5:00 - EST 1969 923 -5:00 US E%sT 1973 924 -5:00 - EST 2006 925 -5:00 US E%sT 926 927 # Part of Kentucky left its clocks alone in 1974. 928 # This also includes Clark, Floyd, and Harrison counties in Indiana. 929 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 930 Rule Louisville 1921 only - May 1 2:00 1:00 D 931 Rule Louisville 1921 only - Sep 1 2:00 0 S 932 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 933 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 934 Rule Louisville 1946 only - Jun 2 2:00 0 S 935 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 936 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 937 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 938 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 939 -6:00 US C%sT 1921 940 -6:00 Louisville C%sT 1942 941 -6:00 US C%sT 1946 942 -6:00 Louisville C%sT 1961 Jul 23 2:00 943 -5:00 - EST 1968 944 -5:00 US E%sT 1974 Jan 6 2:00 945 -6:00 1:00 CDT 1974 Oct 27 2:00 946 -5:00 US E%sT 947 # 948 # Wayne County, Kentucky 949 # 950 # From Lake Cumberland LIFE 951 # http://www.lake-cumberland.com/life/archive/news990129time.shtml 952 # (1999-01-29) via WKYM-101.7: 953 # Clinton County has joined Wayne County in asking the DoT to change from 954 # the Central to the Eastern time zone.... The Wayne County government made 955 # the same request in December. And while Russell County officials have not 956 # taken action, the majority of respondents to a poll conducted there in 957 # August indicated they would like to change to "fast time" also. 958 # The three Lake Cumberland counties are the farthest east of any U.S. 959 # location in the Central time zone. 960 # 961 # From Rich Wales (2000-08-29): 962 # After prolonged debate, and despite continuing deep differences of opinion, 963 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 964 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 965 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 966 # 967 # From Paul Eggert (2001-07-16): 968 # The final rule was published in the 969 # Federal Register 65, 160 (2000-08-17), pp 50154-50158. 970 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 971 # 972 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 973 -6:00 US C%sT 1946 974 -6:00 - CST 1968 975 -6:00 US C%sT 2000 Oct 29 2:00 976 -5:00 US E%sT 977 978 979 # From Rives McDow (2000-08-30): 980 # Here ... are all the changes in the US since 1985. 981 # Kearny County, KS (put all of county on central; 982 # previously split between MST and CST) ... 1990-10 983 # Starke County, IN (from CST to EST) ... 1991-10 984 # Oliver County, ND (from MST to CST) ... 1992-10 985 # West Wendover, NV (from PST TO MST) ... 1999-10 986 # Wayne County, KY (from CST to EST) ... 2000-10 987 # 988 # From Paul Eggert (2001-07-17): 989 # We don't know where the line used to be within Kearny County, KS, 990 # so omit that change for now. 991 # See America/Indiana/Knox for the Starke County, IN change. 992 # See America/North_Dakota/Center for the Oliver County, ND change. 993 # West Wendover, NV officially switched from Pacific to mountain time on 994 # 1999-10-31. See the 995 # Federal Register 64, 203 (1999-10-21), pp 56705-56707. 996 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 997 # However, the Federal Register says that West Wendover already operated 998 # on mountain time, and the rule merely made this official; 999 # hence a separate tz entry is not needed. 1000 1001 # Michigan 1002 # 1003 # From Bob Devine (1988-01-28): 1004 # Michigan didn't observe DST from 1968 to 1973. 1005 # 1006 # From Paul Eggert (1999-03-31): 1007 # Shanks writes that Michigan started using standard time on 1885-09-18, 1008 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 1009 # that Detroit kept 1010 # 1011 # local time until 1900 when the City Council decreed that clocks should 1012 # be put back twenty-eight minutes to Central Standard Time. Half the 1013 # city obeyed, half refused. After considerable debate, the decision 1014 # was rescinded and the city reverted to Sun time. A derisive offer to 1015 # erect a sundial in front of the city hall was referred to the 1016 # Committee on Sewers. Then, in 1905, Central time was adopted 1017 # by city vote. 1018 # 1019 # This story is too entertaining to be false, so go with Howse over Shanks. 1020 # 1021 # From Paul Eggert (2001-03-06): 1022 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 1023 # one hour in 1914." This change is not in Shanks. We have no more 1024 # info, so omit this for now. 1025 # 1026 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 1027 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1028 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 1029 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 1030 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 1031 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 1032 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1033 Zone America/Detroit -5:32:11 - LMT 1905 1034 -6:00 - CST 1915 May 15 2:00 1035 -5:00 - EST 1942 1036 -5:00 US E%sT 1946 1037 -5:00 Detroit E%sT 1973 1038 -5:00 US E%sT 1975 1039 -5:00 - EST 1975 Apr 27 2:00 1040 -5:00 US E%sT 1041 # 1042 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1043 # switched from EST to CST/CDT in 1973. 1044 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1045 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1046 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1047 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1048 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1049 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1050 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1051 -6:00 US C%sT 1946 1052 -6:00 Menominee C%sT 1969 Apr 27 2:00 1053 -5:00 - EST 1973 Apr 29 2:00 1054 -6:00 US C%sT 1055 1056 # Navassa 1057 # administered by the US Fish and Wildlife Service 1058 # claimed by US under the provisions of the 1856 Guano Islands Act 1059 # also claimed by Haiti 1060 # occupied 1857/1900 by the Navassa Phosphate Co 1061 # US lighthouse 1917/1996-09 1062 # currently uninhabited 1063 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1064 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1065 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1066 1067 ################################################################################ 1068 1069 1070 # From Paul Eggert (2014-10-31): 1071 # 1072 # Unless otherwise specified, the source for data through 1990 is: 1073 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1074 # San Diego: ACS Publications, Inc. (2003). 1075 # Unfortunately this book contains many errors and cites no sources. 1076 # 1077 # Gwillim Law writes that a good source 1078 # for recent time zone data is the International Air Transport 1079 # Association's Standard Schedules Information Manual (IATA SSIM), 1080 # published semiannually. Law sent in several helpful summaries 1081 # of the IATA's data after 1990. Except where otherwise noted, 1082 # IATA SSIM is the source for entries after 1990. 1083 # 1084 # Other sources occasionally used include: 1085 # 1086 # Edward W. Whitman, World Time Differences, 1087 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1088 # which I found in the UCLA library. 1089 # 1090 # William Willett, The Waste of Daylight, 19th edition 1091 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1092 # [PDF] (1914-03) 1093 # 1094 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1095 # <http://www.jstor.org/stable/1774359>. 1096 # 1097 # See the 'europe' file for Greenland. 1098 1099 # Canada 1100 1101 # From Alain LaBonté (1994-11-14): 1102 # I post here the time zone abbreviations standardized in Canada 1103 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1104 # 1105 # UTC Standard time Daylight saving time 1106 # offset French English French English 1107 # -2:30 - - HAT NDT 1108 # -3 - - HAA ADT 1109 # -3:30 HNT NST - - 1110 # -4 HNA AST HAE EDT 1111 # -5 HNE EST HAC CDT 1112 # -6 HNC CST HAR MDT 1113 # -7 HNR MST HAP PDT 1114 # -8 HNP PST HAY YDT 1115 # -9 HNY YST - - 1116 # 1117 # HN: Heure Normale ST: Standard Time 1118 # HA: Heure Avancée DT: Daylight saving Time 1119 # 1120 # A: de l'Atlantique Atlantic 1121 # C: du Centre Central 1122 # E: de l'Est Eastern 1123 # M: Mountain 1124 # N: Newfoundland 1125 # P: du Pacifique Pacific 1126 # R: des Rocheuses 1127 # T: de Terre-Neuve 1128 # Y: du Yukon Yukon 1129 # 1130 # From Paul Eggert (1994-11-22): 1131 # Alas, this sort of thing must be handled by localization software. 1132 1133 # Unless otherwise specified, the data entries for Canada are all from Shanks 1134 # & Pottenger. 1135 1136 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1137 # 2007-03-01): 1138 # The British Columbia government announced yesterday that it will 1139 # adjust daylight savings next year to align with changes in the 1140 # U.S. and the rest of Canada.... 1141 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1142 # ... 1143 # Nova Scotia 1144 # Daylight saving time will be extended by four weeks starting in 2007.... 1145 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1146 # 1147 # [For New Brunswick] the new legislation dictates that the time change is to 1148 # be done at 02:00 instead of 00:01. 1149 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1150 # ... 1151 # Manitoba has traditionally changed the clock every fall at 03:00. 1152 # As of 2006, the transition is to take place one hour earlier at 02:00. 1153 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1154 # ... 1155 # [Alberta, Ontario, Quebec] will follow US rules. 1156 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1157 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1158 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1159 # ... 1160 # P.E.I. will follow US rules.... 1161 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1162 # ... 1163 # Province of Newfoundland and Labrador.... 1164 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1165 # ... 1166 # Yukon 1167 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1168 # ... 1169 # N.W.T. will follow US rules. Whoever maintains the government web site 1170 # does not seem to believe in bookmarks. To see the news release, click the 1171 # following link and search for "Daylight Savings Time Change". Press the 1172 # "Daylight Savings Time Change" link; it will fire off a popup using 1173 # JavaScript. 1174 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1175 # ... 1176 # Nunavut 1177 # An amendment to the Interpretation Act was registered on February 19/2007.... 1178 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1179 1180 # From Paul Eggert (2014-10-18): 1181 # H. David Matthews and Mary Vincent's map 1182 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1183 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1184 # contains detailed boundaries for regions observing nonstandard 1185 # time and daylight saving time arrangements in Canada circa 1998. 1186 # 1187 # National Research Council Canada maintains info about time zones and DST. 1188 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1189 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1190 # Its unofficial information is often taken from Matthews and Vincent. 1191 1192 # From Paul Eggert (2006-06-27): 1193 # For now, assume all of DST-observing Canada will fall into line with the 1194 # new US DST rules, 1195 1196 # From Chris Walton (2011-12-01) 1197 # In the first of Tammy Hardwick's articles 1198 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1199 # she quotes the Friday November 1/1918 edition of the Creston Review. 1200 # The quote includes these two statements: 1201 # 'Sunday the CPR went back to the old system of time...' 1202 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1203 # These statements refer to a transition from daylight time to standard time 1204 # that occurred nationally on Sunday October 27/1918. This transition was 1205 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1206 1207 # In light of that evidence, we alter the date from the earlier believed 1208 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1209 # than Thursday) in all Canadian rulesets. 1210 1211 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1212 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1213 Rule Canada 1918 only - Oct 27 2:00 0 S 1214 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1215 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1216 Rule Canada 1945 only - Sep 30 2:00 0 S 1217 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1218 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1219 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1220 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1221 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1222 1223 1224 # Newfoundland and Labrador 1225 1226 # From Paul Eggert (2000-10-02): 1227 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1228 # but the only part of Labrador that follows the rules is the 1229 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1230 # but excluding, say, Black Tickle. 1231 1232 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1233 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1234 Rule StJohns 1917 only - Sep 17 2:00 0 S 1235 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1236 Rule StJohns 1919 only - May 5 23:00 1:00 D 1237 Rule StJohns 1919 only - Aug 12 23:00 0 S 1238 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1239 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1240 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1241 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1242 # Pottenger. 1243 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1244 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1245 # Whitman gives the following transitions: 1246 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1247 # but go with Shanks & Pottenger and assume they used Canadian rules. 1248 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1249 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1250 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1251 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1252 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1253 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1254 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1255 # From Paul Eggert (2000-10-02): 1256 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1257 # at 00:01 local time. For now, assume it started in 1987. 1258 1259 # From Michael Pelley (2011-09-12): 1260 # We received today, Monday, September 12, 2011, notification that the 1261 # changes to the Newfoundland Standard Time Act have been proclaimed. 1262 # The change in the Act stipulates that the change from Daylight Savings 1263 # Time to Standard Time and from Standard Time to Daylight Savings Time 1264 # now occurs at 2:00AM. 1265 # ... 1266 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1267 # ... 1268 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1269 # Office of the Chief Information Officer 1270 # Executive Council 1271 # Government of Newfoundland & Labrador 1272 1273 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1274 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1275 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1276 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1277 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1278 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1279 # 1280 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1281 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1282 Zone America/St_Johns -3:30:52 - LMT 1884 1283 -3:30:52 StJohns N%sT 1918 1284 -3:30:52 Canada N%sT 1919 1285 -3:30:52 StJohns N%sT 1935 Mar 30 1286 -3:30 StJohns N%sT 1942 May 11 1287 -3:30 Canada N%sT 1946 1288 -3:30 StJohns N%sT 2011 Nov 1289 -3:30 Canada N%sT 1290 1291 # most of east Labrador 1292 1293 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1294 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1295 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1296 -3:30:52 - NST 1918 1297 -3:30:52 Canada N%sT 1919 1298 -3:30:52 - NST 1935 Mar 30 1299 -3:30 - NST 1936 1300 -3:30 StJohns N%sT 1942 May 11 1301 -3:30 Canada N%sT 1946 1302 -3:30 StJohns N%sT 1966 Mar 15 2:00 1303 -4:00 StJohns A%sT 2011 Nov 1304 -4:00 Canada A%sT 1305 1306 1307 # west Labrador, Nova Scotia, Prince Edward I 1308 1309 # From Brian Inglis (2015-07-20): 1310 # From the historical weather station records available at: 1311 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1312 # Sydney shares the same time history as Glace Bay, so was 1313 # likely to be the same across the island.... 1314 # Sydney, as the capital and most populous location, or Cape Breton, would 1315 # have been better names for the zone had we known this in 1996. 1316 1317 # From Paul Eggert (2015-07-20): 1318 # Shanks & Pottenger write that since 1970 most of this region has been like 1319 # Halifax. Many locales did not observe peacetime DST until 1972; 1320 # the Cape Breton area, represented by Glace Bay, is the largest we know of 1321 # (Glace Bay was perhaps not the best name choice but no point changing now). 1322 # Shanks & Pottenger also write that Liverpool, NS was the only town 1323 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1324 # this is a typo. 1325 1326 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1327 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1328 Rule Halifax 1916 only - Oct 1 0:00 0 S 1329 Rule Halifax 1920 only - May 9 0:00 1:00 D 1330 Rule Halifax 1920 only - Aug 29 0:00 0 S 1331 Rule Halifax 1921 only - May 6 0:00 1:00 D 1332 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1333 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1334 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1335 Rule Halifax 1923 only - Sep 4 0:00 0 S 1336 Rule Halifax 1924 only - Sep 15 0:00 0 S 1337 Rule Halifax 1925 only - Sep 28 0:00 0 S 1338 Rule Halifax 1926 only - May 16 0:00 1:00 D 1339 Rule Halifax 1926 only - Sep 13 0:00 0 S 1340 Rule Halifax 1927 only - May 1 0:00 1:00 D 1341 Rule Halifax 1927 only - Sep 26 0:00 0 S 1342 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1343 Rule Halifax 1928 only - Sep 9 0:00 0 S 1344 Rule Halifax 1929 only - Sep 3 0:00 0 S 1345 Rule Halifax 1930 only - Sep 15 0:00 0 S 1346 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1347 Rule Halifax 1932 only - May 1 0:00 1:00 D 1348 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1349 Rule Halifax 1933 only - Oct 2 0:00 0 S 1350 Rule Halifax 1934 only - May 20 0:00 1:00 D 1351 Rule Halifax 1934 only - Sep 16 0:00 0 S 1352 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1353 Rule Halifax 1935 only - Sep 30 0:00 0 S 1354 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1355 Rule Halifax 1936 only - Sep 14 0:00 0 S 1356 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1357 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1358 Rule Halifax 1939 only - May 28 0:00 1:00 D 1359 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1360 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1361 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1362 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1363 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1364 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1365 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1366 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1367 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1368 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1369 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1370 -4:00 Halifax A%sT 1918 1371 -4:00 Canada A%sT 1919 1372 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1373 -4:00 Canada A%sT 1946 1374 -4:00 Halifax A%sT 1974 1375 -4:00 Canada A%sT 1376 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1377 -4:00 Canada A%sT 1953 1378 -4:00 Halifax A%sT 1954 1379 -4:00 - AST 1972 1380 -4:00 Halifax A%sT 1974 1381 -4:00 Canada A%sT 1382 1383 # New Brunswick 1384 1385 # From Paul Eggert (2007-01-31): 1386 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1387 # says they changed at 00:01 through 2006, and 1388 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1389 # clear that this was the case since at least 1993. 1390 # For now, assume it started in 1993. 1391 1392 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1393 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1394 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1395 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1396 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1397 Rule Moncton 1939 only - May 27 1:00 1:00 D 1398 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1399 Rule Moncton 1940 only - May 19 1:00 1:00 D 1400 Rule Moncton 1941 only - May 4 1:00 1:00 D 1401 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1402 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1403 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1404 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1405 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1406 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1407 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1408 -5:00 - EST 1902 Jun 15 1409 -4:00 Canada A%sT 1933 1410 -4:00 Moncton A%sT 1942 1411 -4:00 Canada A%sT 1946 1412 -4:00 Moncton A%sT 1973 1413 -4:00 Canada A%sT 1993 1414 -4:00 Moncton A%sT 2007 1415 -4:00 Canada A%sT 1416 1417 # Quebec 1418 1419 # From Paul Eggert (2015-03-24): 1420 # See America/Toronto for most of Quebec, including Montreal. 1421 # 1422 # Matthews and Vincent (1998) also write that Quebec east of the -63 1423 # meridian is supposed to observe AST, but residents as far east as 1424 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1425 # The Quebec department of justice writes in 1426 # "The situation in Minganie and Basse-Côte-Nord" 1427 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1428 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1429 # observes Atlantic standard time all year round. 1430 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1431 # says this common practice was codified into law as of 2007. 1432 # For lack of better info, guess this practice began around 1970, contra to 1433 # Shanks & Pottenger who have this region observing AST/ADT. 1434 1435 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1436 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1437 -4:00 Canada A%sT 1970 1438 -4:00 - AST 1439 1440 # Ontario 1441 1442 # From Paul Eggert (2006-07-09): 1443 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1444 # Toronto. 1445 # Thunder Bay skipped DST in 1973. 1446 # Many smaller locales did not observe peacetime DST until 1974; 1447 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1448 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1449 1450 # From Mark Brader (2003-07-26): 1451 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1452 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1453 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1454 # have already done so. In Orillia DST was to run until Saturday, 1455 # 1912-08-31 (no time mentioned), but it was met with considerable 1456 # hostility from certain segments of the public, and was revoked after 1457 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1458 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1459 # earlier in June). 1460 # 1461 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1462 1463 # From Paul Eggert (1997-10-17): 1464 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1465 # says that Atikokan, Ontario currently does not observe DST, 1466 # but will vote on 11-10 whether to use EST/EDT. 1467 # He also writes that the Ontario Time Act (1990, Chapter T.9) 1468 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1469 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1470 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1471 # concerns a non-official time observed as a matter of local practice. 1472 # 1473 # From Paul Eggert (2000-10-02): 1474 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1475 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1476 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1477 # violation of the official Ontario rules. 1478 # 1479 # From Paul Eggert (2006-07-09): 1480 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1481 # 2005-07-21 Chronicle-Journal, which said: 1482 # 1483 # The clocks in Atikokan stay set on standard time year-round. 1484 # This means they spend about half the time on central time and 1485 # the other half on eastern time. 1486 # 1487 # For the most part, the system works, Mayor Dennis Brown said. 1488 # 1489 # "The majority of businesses in Atikokan deal more with Eastern 1490 # Canada, but there are some that deal with Western Canada," he 1491 # said. "I don't see any changes happening here." 1492 # 1493 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1494 # [New Osnaburgh] follow the same practice." 1495 1496 # From Garry McKinnon (2006-07-14) via Chris Walton: 1497 # I chatted with a member of my board who has an outstanding memory 1498 # and a long history in Atikokan (and in the telecom industry) and he 1499 # can say for certain that Atikokan has been practicing the current 1500 # time keeping since 1952, at least. 1501 1502 # From Paul Eggert (2006-07-17): 1503 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1504 # ever since standard time was introduced, but the information from 1505 # McKinnon sounds more authoritative. For now, assume that Atikokan 1506 # switched to EST immediately after WWII era daylight saving time 1507 # ended. This matches the old (less-populous) America/Coral_Harbour 1508 # entry since our cutoff date of 1970, so we can move 1509 # America/Coral_Harbour to the 'backward' file. 1510 1511 # From Mark Brader (2010-03-06): 1512 # 1513 # Currently the database has: 1514 # 1515 # # Ontario 1516 # 1517 # # From Paul Eggert (2006-07-09): 1518 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1519 # # Toronto. 1520 # # Thunder Bay skipped DST in 1973. 1521 # # Many smaller locales did not observe peacetime DST until 1974; 1522 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1523 # 1524 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1525 # right corner of page 1, it says that Toronto will return to standard 1526 # time at 2 am Sunday morning (which agrees with the database), and that: 1527 # 1528 # The one-hour setback will go into effect throughout most of Ontario, 1529 # except in areas like Windsor which remains on standard time all year. 1530 # 1531 # Windsor is, of course, a lot larger than Nipigon. 1532 # 1533 # I only came across this incidentally. I don't know if Windsor began 1534 # observing DST when Detroit did, or in 1974, or on some other date. 1535 # 1536 # By the way, the article continues by noting that: 1537 # 1538 # Some cities in the United States have pushed the deadline back 1539 # three weeks and will change over from daylight saving in October. 1540 1541 # From Arthur David Olson (2010-07-17): 1542 # 1543 # "Standard Time and Time Zones in Canada" appeared in 1544 # The Journal of The Royal Astronomical Society of Canada, 1545 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1546 # was available at 1547 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1548 # 1549 # It includes the text below (starting on page 57): 1550 # 1551 # A list of the places in Canada using daylight saving time would 1552 # require yearly revision. From information kindly furnished by 1553 # the provincial governments and by the postmasters in many cities 1554 # and towns, it is found that the following places used daylight sav- 1555 # ing in 1930. The information for the province of Quebec is definite, 1556 # for the other provinces only approximate: 1557 # 1558 # Province Daylight saving time used 1559 # Prince Edward Island Not used. 1560 # Nova Scotia In Halifax only. 1561 # New Brunswick In St. John only. 1562 # Quebec In the following places: 1563 # Montreal Lachine 1564 # Quebec Mont-Royal 1565 # Lévis Iberville 1566 # St. Lambert Cap de la Madelèine 1567 # Verdun Loretteville 1568 # Westmount Richmond 1569 # Outremont St. Jérôme 1570 # Longueuil Greenfield Park 1571 # Arvida Waterloo 1572 # Chambly-Canton Beaulieu 1573 # Melbourne La Tuque 1574 # St. Théophile Buckingham 1575 # Ontario Used generally in the cities and towns along 1576 # the southerly part of the province. Not 1577 # used in the northwesterly part. 1578 # Manitoba Not used. 1579 # Saskatchewan In Regina only. 1580 # Alberta Not used. 1581 # British Columbia Not used. 1582 # 1583 # With some exceptions, the use of daylight saving may be said to be limited 1584 # to those cities and towns lying between Quebec city and Windsor, Ont. 1585 1586 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1587 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1588 Rule Toronto 1919 only - Oct 26 0:00 0 S 1589 Rule Toronto 1920 only - May 2 2:00 1:00 D 1590 Rule Toronto 1920 only - Sep 26 0:00 0 S 1591 Rule Toronto 1921 only - May 15 2:00 1:00 D 1592 Rule Toronto 1921 only - Sep 15 2:00 0 S 1593 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1594 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1595 # was meant. 1596 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1597 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1598 # The 1927-to-1939 rules can be expressed more simply as 1599 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1600 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1601 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1602 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1603 # The rules below avoid use of Sun>=25 1604 # (which pre-2004 versions of zic cannot handle). 1605 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1606 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1607 Rule Toronto 1932 only - May 1 2:00 1:00 D 1608 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1609 Rule Toronto 1933 only - Oct 1 2:00 0 S 1610 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1611 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1612 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1613 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1614 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1615 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1616 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1617 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1618 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1619 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1620 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1621 # is wrong, and that he had confirmed it by checking the 1971-10-30 1622 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1623 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1624 1625 # From Paul Eggert (2003-07-27): 1626 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1627 # Port Arthur, Ontario, the principle of the Bill has been in 1628 # operation for the past three years, and in the City of Moose Jaw, 1629 # Saskatchewan, for one year." 1630 1631 # From David Bryan via Tory Tronrud, Director/Curator, 1632 # Thunder Bay Museum (2003-11-12): 1633 # There is some suggestion, however, that, by-law or not, daylight 1634 # savings time was being practiced in Fort William and Port Arthur 1635 # before 1909.... [I]n 1910, the line between the Eastern and Central 1636 # Time Zones was permanently moved about two hundred miles west to 1637 # include the Thunder Bay area.... When Canada adopted daylight 1638 # savings time in 1916, Fort William and Port Arthur, having done so 1639 # already, did not change their clocks.... During the Second World 1640 # War,... [t]he cities agreed to implement DST during the summer 1641 # months for the remainder of the war years. 1642 1643 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1644 Zone America/Toronto -5:17:32 - LMT 1895 1645 -5:00 Canada E%sT 1919 1646 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1647 -5:00 Canada E%sT 1946 1648 -5:00 Toronto E%sT 1974 1649 -5:00 Canada E%sT 1650 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1651 -6:00 - CST 1910 1652 -5:00 - EST 1942 1653 -5:00 Canada E%sT 1970 1654 -5:00 Toronto E%sT 1973 1655 -5:00 - EST 1974 1656 -5:00 Canada E%sT 1657 Zone America/Nipigon -5:53:04 - LMT 1895 1658 -5:00 Canada E%sT 1940 Sep 29 1659 -5:00 1:00 EDT 1942 Feb 9 2:00s 1660 -5:00 Canada E%sT 1661 Zone America/Rainy_River -6:18:16 - LMT 1895 1662 -6:00 Canada C%sT 1940 Sep 29 1663 -6:00 1:00 CDT 1942 Feb 9 2:00s 1664 -6:00 Canada C%sT 1665 Zone America/Atikokan -6:06:28 - LMT 1895 1666 -6:00 Canada C%sT 1940 Sep 29 1667 -6:00 1:00 CDT 1942 Feb 9 2:00s 1668 -6:00 Canada C%sT 1945 Sep 30 2:00 1669 -5:00 - EST 1670 1671 1672 # Manitoba 1673 1674 # From Rob Douglas (2006-04-06): 1675 # the old Manitoba Time Act - as amended by Bill 2, assented to 1676 # March 27, 1987 ... said ... 1677 # "between two o'clock Central Standard Time in the morning of 1678 # the first Sunday of April of each year and two o'clock Central 1679 # Standard Time in the morning of the last Sunday of October next 1680 # following, one hour in advance of Central Standard Time."... 1681 # I believe that the English legislation [of the old time act] had 1682 # been assented to (March 22, 1967).... 1683 # Also, as far as I can tell, there was no order-in-council varying 1684 # the time of Daylight Saving Time for 2005 and so the provisions of 1685 # the 1987 version would apply - the changeover was at 2:00 Central 1686 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1687 1688 # From Paul Eggert (2006-04-10): 1689 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1690 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1691 # it was also 02:00s in 1966. 1692 1693 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1694 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1695 Rule Winn 1916 only - Sep 17 0:00 0 S 1696 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1697 Rule Winn 1918 only - Oct 27 2:00 0 S 1698 Rule Winn 1937 only - May 16 2:00 1:00 D 1699 Rule Winn 1937 only - Sep 26 2:00 0 S 1700 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1701 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1702 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1703 Rule Winn 1946 only - May 12 2:00 1:00 D 1704 Rule Winn 1946 only - Oct 13 2:00 0 S 1705 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1706 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1707 Rule Winn 1950 only - May 1 2:00 1:00 D 1708 Rule Winn 1950 only - Sep 30 2:00 0 S 1709 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1710 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1711 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1712 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1713 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1714 Rule Winn 1963 only - Sep 22 2:00 0 S 1715 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1716 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1717 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1718 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1719 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1720 -6:00 Winn C%sT 2006 1721 -6:00 Canada C%sT 1722 1723 1724 # Saskatchewan 1725 1726 # From Mark Brader (2003-07-26): 1727 # The first actual adoption of DST in Canada was at the municipal 1728 # level. As the [Toronto] Star put it (1912-06-07), "While people 1729 # elsewhere have long been talking of legislation to save daylight, 1730 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1731 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1732 # presumably late evening, as below), and would run until "the end of 1733 # the summer". The discrepancy between municipal time and railroad 1734 # time was noted. 1735 1736 # From Paul Eggert (2003-07-27): 1737 # Willett (1914-03) notes that DST "has been in operation ... in the 1738 # City of Moose Jaw, Saskatchewan, for one year." 1739 1740 # From Paul Eggert (2006-03-22): 1741 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1742 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1743 # Other western towns (e.g. Lloydminster) are like Edmonton. 1744 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1745 # are like Winnipeg, in violation of Saskatchewan law. 1746 1747 # From W. Jones (1992-11-06): 1748 # The. . .below is based on information I got from our law library, the 1749 # provincial archives, and the provincial Community Services department. 1750 # A precise history would require digging through newspaper archives, and 1751 # since you didn't say what you wanted, I didn't bother. 1752 # 1753 # Saskatchewan is split by a time zone meridian (105W) and over the years 1754 # the boundary became pretty ragged as communities near it reevaluated 1755 # their affiliations in one direction or the other. In 1965 a provincial 1756 # referendum favoured legislating common time practices. 1757 # 1758 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1759 # Saskatchewan 1978) was proclaimed, and established that the eastern 1760 # part of Saskatchewan would use CST year round, that districts in 1761 # northwest Saskatchewan would by default follow CST but could opt to 1762 # follow Mountain Time rules (thus 1 hour difference in the winter and 1763 # zero in the summer), and that districts in southwest Saskatchewan would 1764 # by default follow MT but could opt to follow CST. 1765 # 1766 # It took a few years for the dust to settle (I know one story of a town 1767 # on one time zone having its school in another, such that a mom had to 1768 # serve her family lunch in two shifts), but presently it seems that only 1769 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1770 # rules any more; all other districts appear to have used CST year round 1771 # since sometime in the 1960s. 1772 1773 # From Chris Walton (2006-06-26): 1774 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1775 # long and rather painful to read. 1776 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1777 1778 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1779 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1780 Rule Regina 1918 only - Oct 27 2:00 0 S 1781 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1782 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1783 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1784 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1785 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1786 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1787 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1788 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1789 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1790 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1791 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1792 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1793 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1794 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1795 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1796 # 1797 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1798 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1799 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1800 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1801 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1802 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1803 Zone America/Regina -6:58:36 - LMT 1905 Sep 1804 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1805 -6:00 - CST 1806 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1807 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1808 -7:00 Regina M%sT 1950 1809 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1810 -6:00 - CST 1811 1812 1813 # Alberta 1814 1815 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1816 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1817 Rule Edm 1918 only - Oct 27 2:00 0 S 1818 Rule Edm 1919 only - May 27 2:00 0 S 1819 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1820 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1821 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1822 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1823 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1824 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1825 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1826 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1827 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1828 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1829 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1830 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1831 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1832 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1833 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1834 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1835 -7:00 Edm M%sT 1987 1836 -7:00 Canada M%sT 1837 1838 1839 # British Columbia 1840 1841 # From Paul Eggert (2006-03-22): 1842 # Shanks & Pottenger write that since 1970 most of this region has 1843 # been like Vancouver. 1844 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1845 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1846 1847 # It seems though that (re: Creston) is not entirely correct: 1848 1849 # From Chris Walton (2011-12-01): 1850 # There are two areas within the Canadian province of British Columbia 1851 # that do not currently observe daylight saving: 1852 # a) The Creston Valley (includes the town of Creston and surrounding area) 1853 # b) The eastern half of the Peace River Regional District 1854 # (includes the cities of Dawson Creek and Fort St. John) 1855 1856 # Earlier this year I stumbled across a detailed article about the time 1857 # keeping history of Creston; it was written by Tammy Hardwick who is the 1858 # manager of the Creston & District Museum. The article was written in May 2009. 1859 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1860 # According to the article, Creston has not changed its clocks since June 1918. 1861 # i.e. Creston has been stuck on UTC-7 for 93 years. 1862 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1863 1864 # Unfortunately the exact date for the time change in June 1918 remains 1865 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1866 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1867 # as plausible as any other date (in June). She also said that after writing 1868 # the article she had discovered another time change in 1916; this is the 1869 # subject of another article which she wrote in October 2010. 1870 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1871 1872 # Here is a summary of the three clock change events in Creston's history: 1873 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1874 # Exact date unknown 1875 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1876 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1877 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1878 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1879 # note 1: 1880 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1881 # Creston did not change its clocks. 1882 # note 2: 1883 # During WWII when the Federal Government legislated a mandatory clock change, 1884 # Creston did not oblige. 1885 # note 3: 1886 # There is no guarantee that Creston will remain on Mountain Standard Time 1887 # (UTC-7) forever. 1888 # The subject was debated at least once this year by the town Council. 1889 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1890 1891 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1892 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1893 # summer time to cause the offset to be -7:00, the same as it had been before 1894 # the change. It can be argued that the timezone abbreviation during this 1895 # period should be PDT rather than MST, but that doesn't seem important enough 1896 # (to anyone) to further complicate the rules. 1897 1898 # The transition dates (and times) are guesses. 1899 1900 # From Matt Johnson (2015-09-21): 1901 # Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1902 # were aligned with America/Vancouver, they're now aligned with 1903 # America/Dawson_Creek. 1904 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1905 # 1906 # From Tim Parenti (2015-09-23): 1907 # This requires a new zone for the Northern Rockies Regional Municipality, 1908 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1909 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1910 # been on MST (-0700) like Dawson Creek since it advanced its clocks on 1911 # 2015-03-08. 1912 # 1913 # From Paul Eggert (2015-09-23): 1914 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1915 1916 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1917 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1918 Rule Vanc 1918 only - Oct 27 2:00 0 S 1919 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1920 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1921 Rule Vanc 1945 only - Sep 30 2:00 0 S 1922 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1923 Rule Vanc 1946 only - Oct 13 2:00 0 S 1924 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1925 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1926 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1927 Zone America/Vancouver -8:12:28 - LMT 1884 1928 -8:00 Vanc P%sT 1987 1929 -8:00 Canada P%sT 1930 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1931 -8:00 Canada P%sT 1947 1932 -8:00 Vanc P%sT 1972 Aug 30 2:00 1933 -7:00 - MST 1934 Zone America/Fort_Nelson -8:10:47 - LMT 1884 1935 -8:00 Vanc P%sT 1946 1936 -8:00 - PST 1947 1937 -8:00 Vanc P%sT 1987 1938 -8:00 Canada P%sT 2015 Mar 8 2:00 1939 -7:00 - MST 1940 Zone America/Creston -7:46:04 - LMT 1884 1941 -7:00 - MST 1916 Oct 1 1942 -8:00 - PST 1918 Jun 2 1943 -7:00 - MST 1944 1945 # Northwest Territories, Nunavut, Yukon 1946 1947 # From Paul Eggert (2006-03-22): 1948 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1949 # Mathew Englander (1996-10-07) gives the following refs: 1950 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1951 # c. 7 defines Yukon standard time as UTC-9.... 1952 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1953 # [http://canlii.ca/t/7vhg] 1954 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1955 # * O.I.C. 1980/02 established DST. 1956 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1957 1958 # From Brian Inglis (2015-04-14): 1959 # 1960 # I tried to trace the history of Yukon time and found the following 1961 # regulations, giving the reference title and URL if found, regulation name, 1962 # and relevant quote if available. Each regulation specifically revokes its 1963 # predecessor. The final reference is to the current Interpretation Act 1964 # authorizing and resulting from these regulatory changes. 1965 # 1966 # Only recent regulations were retrievable via Yukon government site search or 1967 # index, and only some via Canadian legal sources. Other sources used include 1968 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1969 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1970 # 1970 quoted below; each article includes current extracts from provincial 1971 # and territorial ST and DST regulations at the end, summaries and details of 1972 # standard times and daylight saving time at many locations across Canada, 1973 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1974 # and LMST; they also cover many countries and global locations, with a chart 1975 # and table showing current Universal Time offsets, and may be useful as 1976 # another source of information for 1970 and earlier. 1977 # 1978 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 1979 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 1980 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 1981 # Yukon Interpretation Ordinance 1982 # Yukon standard time is the local mean time at the one hundred and 1983 # thirty-fifth meridian. 1984 # 1985 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 1986 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 1987 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 1988 # Yukon Interpretation Ordinance, 1955, Chap. 16. 1989 # 1990 # (1) Subject to this section, standard time shall be reckoned as nine 1991 # hours behind Greenwich Time and called Yukon Standard Time. 1992 # 1993 # (2) Notwithstanding subsection (1), the Commissioner may make regulations 1994 # varying the manner of reckoning standard time. 1995 # 1996 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 1997 # http://? - no online source found 1998 # 1999 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2000 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2001 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2002 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2003 # 2004 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2005 # Territory on 27th January, 1966, is hereby revoked. 2006 # 2007 # 2. Yukon (East) Standard Time as defined by section 36 of the 2008 # Interpretation Ordinance from and after mid-night on the 28th day of May, 2009 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2010 # is to say, eight hours behind Greenwich Time in the area of the Yukon 2011 # Territory lying east of the 138th degree longitude west. 2012 # 2013 # 3. In the remainder of the Territory, lying west of the 138th degree 2014 # longitude west, Yukon (West) Standard Time shall be reckoned as nine 2015 # hours behind Greenwich Time. 2016 # 2017 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2018 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2019 # C.O. 1973/214 INTERPRETATION ACT ... 2020 # 2021 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2022 # revoked. 2023 # 2024 # 2. Yukon Standard Time as defined by section 36 of the Interpretation 2025 # Act from and after midnight on the twenty-eighth day of October, 1973 2026 # shall be reckoned in the same manner as Pacific Standard Time, that is 2027 # to say eight hours behind Greenwich Time. 2028 # 2029 # * O.I.C. 1980/02 INTERPRETATION ACT 2030 # http://? - no online source found 2031 # 2032 # * Yukon Daylight Saving Time, YOIC 1987/56 2033 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2034 # O.I.C. 1987/056 INTERPRETATION ACT ... 2035 # 2036 # In every year between 2037 # (a) two o'clock in the morning in the first Sunday in April, and 2038 # (b) two o'clock in the morning in the last Sunday in October, 2039 # Standard Time shall be reckoned as seven hours behind Greenwich Time and 2040 # called Yukon Daylight Saving Time. 2041 # ... 2042 # Dated ... 9th day of March, A.D., 1987. 2043 # 2044 # * Yukon Daylight Saving Time 2006, YOIC 2006/127 2045 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2046 # O.I.C. 2006/127 INTERPRETATION ACT ... 2047 # 2048 # 1. In Yukon each year the time for general purposes shall be 7 hours 2049 # behind Greenwich mean time during the period commencing at two o'clock 2050 # in the forenoon on the second Sunday of March and ending at two o'clock 2051 # in the forenoon on the first Sunday of November and shall be called 2052 # Yukon Daylight Saving Time. 2053 # 2054 # 2. Order-in-Council 1987/56 is revoked. 2055 # 2056 # 3. This order comes into force January 1, 2007. 2057 # 2058 # * Interpretation Act, RSY 2002, c 125 2059 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2060 2061 # From Rives McDow (1999-09-04): 2062 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 2063 # Nunavut moves to single time zone Oct. 31 2064 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html 2065 # 2066 # From Antoine Leca (1999-09-06): 2067 # We then need to create a new timezone for the Kitikmeot region of Nunavut 2068 # to differentiate it from the Yellowknife region. 2069 2070 # From Paul Eggert (1999-09-20): 2071 # Basic Facts: The New Territory 2072 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2073 # (1999) reports that Pangnirtung operates on eastern time, 2074 # and that Coral Harbour does not observe DST. We don't know when 2075 # Pangnirtung switched to eastern time; we'll guess 1995. 2076 2077 # From Rives McDow (1999-11-08): 2078 # On October 31, when the rest of Nunavut went to Central time, 2079 # Pangnirtung wobbled. Here is the result of their wobble: 2080 # 2081 # The following businesses and organizations in Pangnirtung use Central Time: 2082 # 2083 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2084 # Eastern Arctic National Parks, A & D Specialist 2085 # 2086 # The following businesses and organizations in Pangnirtung use Eastern Time: 2087 # 2088 # Hamlet office, All other businesses, Both schools, Airport operator 2089 # 2090 # This has made for an interesting situation there, which warranted the news. 2091 # No one there that I spoke with seems concerned, or has plans to 2092 # change the local methods of keeping time, as it evidently does not 2093 # really interfere with any activities or make things difficult locally. 2094 # They plan to celebrate New Year's turn-over twice, one hour apart, 2095 # so it appears that the situation will last at least that long. 2096 # The Nunavut Intergovernmental Affairs hopes that they will "come to 2097 # their senses", but the locals evidently don't see any problem with 2098 # the current state of affairs. 2099 2100 # From Michaela Rodrigue, writing in the 2101 # Nunatsiaq News (1999-11-19): 2102 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2103 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2104 # central - or Nunavut time - for government offices, and eastern time 2105 # for municipal offices and schools.... Igloolik [was similar but then] 2106 # made the switch to central time on Saturday, Nov. 6. 2107 2108 # From Paul Eggert (2000-10-02): 2109 # Matthews and Vincent (1998) say the following, but we lack histories 2110 # for these potential new Zones. 2111 # 2112 # The Canadian Forces station at Alert uses Eastern Time while the 2113 # handful of residents at the Eureka weather station [in the Central 2114 # zone] skip daylight savings. Baffin Island, which is crossed by the 2115 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 2116 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2117 # Central Time and Southampton Island [in the Central zone] is not 2118 # required to use daylight savings. 2119 2120 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2121 # Nunavut now has two time zones (2000-11-10): 2122 # The Nunavut government would allow its employees in Kugluktuk and 2123 # Cambridge Bay to operate on central time year-round, putting them 2124 # one hour behind the rest of Nunavut for six months during the winter. 2125 # At the end of October the two communities had rebelled against 2126 # Nunavut's unified time zone, refusing to shift to eastern time with 2127 # the rest of the territory for the winter. Cambridge Bay remained on 2128 # central time, while Kugluktuk, even farther west, reverted to 2129 # mountain time, which they had used before the advent of Nunavut's 2130 # unified time zone in 1999. 2131 # 2132 # From Rives McDow (2001-01-20), quoting the Nunavut government: 2133 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2134 2135 # From Paul Eggert (2000-12-04): 2136 # Let's just keep track of the official times for now. 2137 2138 # From Rives McDow (2001-03-07): 2139 # The premier of Nunavut has issued a ministerial statement advising 2140 # that effective 2001-04-01, the territory of Nunavut will revert 2141 # back to three time zones (mountain, central, and eastern). Of the 2142 # cities in Nunavut, Coral Harbor is the only one that I know of that 2143 # has said it will not observe dst, staying on EST year round. I'm 2144 # checking for more info, and will get back to you if I come up with 2145 # more. 2146 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2147 2148 # From Gwillim Law (2005-05-21): 2149 # According to ... 2150 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2151 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2152 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2153 # round. Using Google, it's easy to find other websites that confirm this. 2154 # I wasn't able to find how far back this time regimen goes, but since it 2155 # predates the creation of Nunavut, it probably goes back many years.... 2156 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2157 # 2158 # From Paul Eggert (2014-10-17): 2159 # For lack of better information, assume that Southampton Island observed 2160 # daylight saving only during wartime. Gwillim Law's email also 2161 # mentioned maps now maintained by National Research Council Canada; 2162 # see above for an up-to-date link. 2163 2164 # From Chris Walton (2007-03-01): 2165 # ... the community of Resolute (located on Cornwallis Island in 2166 # Nunavut) moved from Central Time to Eastern Time last November. 2167 # Basically the community did not change its clocks at the end of 2168 # daylight saving.... 2169 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2170 2171 # From Chris Walton (2011-03-21): 2172 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2173 # Bay. Resolute Bay is a small community located about 900km north of 2174 # the Arctic Circle. The zone file was required because Resolute Bay had 2175 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2176 # 2177 # According to new information which I received last week, Resolute Bay 2178 # went back to using UTC-6 in the winter of 2007-2008... 2179 # 2180 # On March 11/2007 most of Canada went onto daylight saving. On March 2181 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2182 # talked to somebody that was both knowledgeable and helpful. I was able 2183 # to confirm that Resolute Bay was still operating on UTC-5. It was 2184 # explained to me that Resolute Bay had been on the Eastern Time zone 2185 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2186 # i.e. the time zone had changed twice in the last year but the clocks 2187 # had not moved. The residents had to know which time zone they were in 2188 # so they could follow the correct TV schedule... 2189 # 2190 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2191 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2192 # of the phone call, I decided to seek out an alternate source of 2193 # information. I found an e-mail address for somebody by the name of 2194 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2195 # Arctic Co-operatives." I was under the impression that Stephanie lived 2196 # and worked in Resolute Bay... 2197 # 2198 # On March 14/2011 I phoned the hamlet office again. I was told that 2199 # Resolute Bay had been using Central Standard Time over the winter of 2200 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2201 # on March 13/2011. The person I talked to was aware that Resolute Bay 2202 # had previously experimented with Eastern Standard Time but he could not 2203 # tell me when the practice had stopped. 2204 # 2205 # On March 17/2011 I searched the Web to find an e-mail address of 2206 # somebody that might be able to tell me exactly when Resolute Bay went 2207 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2208 # used to be the mayor of Resolute Bay and he apparently owns half the 2209 # businesses including "South Camp Inn." This website has some info on 2210 # Aziz: 2211 # http://www.uphere.ca/node/493 2212 # 2213 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2214 # Eastern Standard Time. 2215 # 2216 # Aziz responded quickly with this: "hi, The time was not changed for the 2217 # 1 year only, the following year, the community went back to the old way 2218 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2219 # the winter Zulu plus 6 hrs" 2220 # 2221 # This of course conflicted with everything I had ascertained in November 2008. 2222 # 2223 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2224 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2225 # may want to check with the weather office in Resolute Bay or do a 2226 # search on the weather through Env. Canada. web site" 2227 # 2228 # If I had realized the Stephanie did not live in Resolute Bay I would 2229 # never have contacted her. I now believe that all the information I 2230 # obtained in November 2008 should be ignored... 2231 # I apologize for reporting incorrect information in 2008. 2232 2233 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2234 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2235 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2236 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2237 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2238 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2239 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2240 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2241 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2242 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2243 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2244 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2245 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2246 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2247 # aka Panniqtuuq 2248 Zone America/Pangnirtung 0 - -00 1921 # trading post est. 2249 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2250 -5:00 Canada E%sT 1999 Oct 31 2:00 2251 -6:00 Canada C%sT 2000 Oct 29 2:00 2252 -5:00 Canada E%sT 2253 # formerly Frobisher Bay 2254 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2255 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2256 -6:00 Canada C%sT 2000 Oct 29 2:00 2257 -5:00 Canada E%sT 2258 # aka Qausuittuq 2259 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2260 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2261 -5:00 - EST 2001 Apr 1 3:00 2262 -6:00 Canada C%sT 2006 Oct 29 2:00 2263 -5:00 - EST 2007 Mar 11 3:00 2264 -6:00 Canada C%sT 2265 # aka Kangiqiniq 2266 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2267 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2268 -5:00 - EST 2001 Apr 1 3:00 2269 -6:00 Canada C%sT 2270 # aka Iqaluktuuttiaq 2271 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2272 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2273 -6:00 Canada C%sT 2000 Oct 29 2:00 2274 -5:00 - EST 2000 Nov 5 0:00 2275 -6:00 - CST 2001 Apr 1 3:00 2276 -7:00 Canada M%sT 2277 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2278 -7:00 NT_YK M%sT 1980 2279 -7:00 Canada M%sT 2280 Zone America/Inuvik 0 - -00 1953 # Inuvik founded 2281 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2282 -7:00 NT_YK M%sT 1980 2283 -7:00 Canada M%sT 2284 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2285 -9:00 NT_YK Y%sT 1967 May 28 0:00 2286 -8:00 NT_YK P%sT 1980 2287 -8:00 Canada P%sT 2288 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2289 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2290 -8:00 NT_YK P%sT 1980 2291 -8:00 Canada P%sT 2292 2293 2294 ############################################################################### 2295 2296 # Mexico 2297 2298 # From Paul Eggert (2014-12-07): 2299 # The Investigation and Analysis Service of the 2300 # Mexican Library of Congress (MLoC) has published a 2301 # history of Mexican local time (in Spanish) 2302 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2303 # 2304 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2305 # (In all cases we go with the MLoC.) 2306 # S&P report that Baja was at -8:00 in 1922/1923. 2307 # S&P say the 1930 transition in Baja was 1930-11-16. 2308 # S&P report no DST during summer 1931. 2309 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2310 2311 # From Gwillim Law (2001-02-20): 2312 # There are some other discrepancies between the Decrees page and the 2313 # tz database. I think they can best be explained by supposing that 2314 # the researchers who prepared the Decrees page failed to find some of 2315 # the relevant documents. 2316 2317 # From Alan Perry (1996-02-15): 2318 # A guy from our Mexico subsidiary finally found the Presidential Decree 2319 # outlining the timezone changes in Mexico. 2320 # 2321 # ------------- Begin Forwarded Message ------------- 2322 # 2323 # I finally got my hands on the Official Presidential Decree that sets up the 2324 # rules for the DST changes. The rules are: 2325 # 2326 # 1. The country is divided in 3 timezones: 2327 # - Baja California Norte (the Mexico/BajaNorte TZ) 2328 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2329 # - The rest of the country (the Mexico/General TZ) 2330 # 2331 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2332 # at 2:00 AM, the times in each zone are as follows: 2333 # BajaNorte: GMT+7 2334 # BajaSur: GMT+6 2335 # General: GMT+5 2336 # 2337 # 3. The rest of the year, the times are as follows: 2338 # BajaNorte: GMT+8 2339 # BajaSur: GMT+7 2340 # General: GMT+6 2341 # 2342 # The Decree was published in Mexico's Official Newspaper on January 4th. 2343 # 2344 # -------------- End Forwarded Message -------------- 2345 # From Paul Eggert (1996-06-12): 2346 # For an English translation of the decree, see 2347 # "Diario Oficial: Time Zone Changeover" (1996-01-04). 2348 # http://mexico-travel.com/extra/timezone_eng.html 2349 2350 # From Rives McDow (1998-10-08): 2351 # The State of Quintana Roo has reverted back to central STD and DST times 2352 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2353 2354 # From Rives McDow (2000-01-10): 2355 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2356 # zone 5 hours from the International Date Line, and will not observe daylight 2357 # savings time so as to stay on the same time zone as the southern part of 2358 # Arizona year round. 2359 2360 # From Jesper Nørgaard, translating 2361 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2362 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2363 # Syndicate of Education Workers, refuse to apply daylight saving each 2364 # year, so that the more than 10,000 schools work at normal hour the 2365 # whole year. 2366 2367 # From Gwillim Law (2001-01-19): 2368 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2369 # (translated):... 2370 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2371 # that Summer Time will be reduced from seven to five months, starting 2372 # this year.... 2373 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2374 # [translated], says "summer time will ... take effect on the first Sunday 2375 # in May, and end on the last Sunday of September. 2376 2377 # From Arthur David Olson (2001-01-25): 2378 # The 2001-01-24 traditional Washington Post contained the page one 2379 # story "Timely Issue Divides Mexicans."... 2380 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2381 # ... Mexico City Mayor López Obrador "...is threatening to keep 2382 # Mexico City and its 20 million residents on a different time than 2383 # the rest of the country..." In particular, López Obrador would abolish 2384 # observation of Daylight Saving Time. 2385 2386 # Official statute published by the Energy Department 2387 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2388 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2389 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2390 2391 # From Paul Eggert (2001-03-03): 2392 # 2393 # http://www.latimes.com/news/nation/20010303/t000018766.html 2394 # James F. Smith writes in today's LA Times 2395 # * Sonora will continue to observe standard time. 2396 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2397 # the Federal District will not adopt DST. 2398 # * 4 of 16 district leaders announced they'll ignore the decree. 2399 # * The decree does not affect federal-controlled facilities including 2400 # the airport, banks, hospitals, and schools. 2401 # 2402 # For now we'll assume that the Federal District will bow to federal rules. 2403 2404 # From Jesper Nørgaard (2001-04-01): 2405 # I found some references to the Mexican application of daylight 2406 # saving, which modifies what I had already sent you, stating earlier 2407 # that a number of northern Mexican states would go on daylight 2408 # saving. The modification reverts this to only cover Baja California 2409 # (Norte), while all other states (except Sonora, who has no daylight 2410 # saving all year) will follow the original decree of president 2411 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2412 # September 30, 2001. 2413 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2414 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2415 2416 # From Reuters (2001-09-04): 2417 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2418 # unconstitutional in Mexico City, creating the possibility the 2419 # capital will be in a different time zone from the rest of the nation 2420 # next year.... The Supreme Court's ruling takes effect at 2:00 2421 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2422 # standard time. "This is so residents of the Federal District are not 2423 # subject to unexpected time changes," a statement from the court said. 2424 2425 # From Jesper Nørgaard Welen (2002-03-12): 2426 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2427 # that a new decision had been made to reinstate US style DST in Mexico.... 2428 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2429 # confirms this. Sonora as usual is the only state where DST is not applied. 2430 2431 # From Steffen Thorsen (2009-12-28): 2432 # 2433 # Steffen Thorsen wrote: 2434 # > Mexico's House of Representatives has approved a proposal for northern 2435 # > Mexico's border cities to share the same daylight saving schedule as 2436 # > the United States. 2437 # Now this has passed both the Congress and the Senate, so starting from 2438 # 2010, some border regions will be the same: 2439 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2440 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2441 # (Spanish) 2442 # 2443 # Could not find the new law text, but the proposed law text changes are here: 2444 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2445 # (Gaceta Parlamentaria) 2446 # 2447 # There is also a list of the votes here: 2448 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2449 # 2450 # Our page: 2451 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2452 2453 # From Arthur David Olson (2010-01-20): 2454 # The page 2455 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2456 # includes this text: 2457 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2458 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2459 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2460 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2461 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2462 # horas del primer domingo de noviembre. 2463 # En los municipios fronterizos que se encuentren ubicados en la franja 2464 # fronteriza norte en el territorio comprendido entre la línea 2465 # internacional y la línea paralela ubicada a una distancia de veinte 2466 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2467 # interior del país, la aplicación de este horario estacional surtirá 2468 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2469 # las dos horas del primer domingo de noviembre. 2470 2471 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2472 # The Mexican state of Quintana Roo will likely change to EST in 2015. 2473 # 2474 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2475 # "With this change, the time conflict that has existed between the municipios 2476 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2477 # end. The latter declared itself in rebellion 15 years ago when a time change 2478 # was initiated in Mexico, and since then it has refused to change its time 2479 # zone along with the rest of the country." 2480 # 2481 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2482 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2483 # "...the new time zone will come into effect at two o'clock on the first Sunday 2484 # of February, when we will have to advance the clock one hour from its current 2485 # time..." 2486 # Also, the new zone will not use DST. 2487 # 2488 # From Carlos Raúl Perasso (2015-02-02): 2489 # The decree that modifies the Mexican Hour System Law has finally 2490 # been published at the Diario Oficial de la Federación 2491 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2492 # It establishes 5 zones for Mexico: 2493 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2494 # includes most of Mexico, excluding what's mentioned below. 2495 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the 2496 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía 2497 # de Banderas which lies in Central Zone); Sinaloa and Sonora. 2498 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2499 # state of Baja California. 2500 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2501 # of Quintana Roo. 2502 # 5- The islands, reefs and keys shall take their timezone from the 2503 # longitude they are located at. 2504 2505 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2506 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2507 Rule Mexico 1939 only - Jun 25 0:00 0 S 2508 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2509 Rule Mexico 1941 only - Apr 1 0:00 0 S 2510 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2511 Rule Mexico 1944 only - May 1 0:00 0 S 2512 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2513 Rule Mexico 1950 only - Jul 30 0:00 0 S 2514 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2515 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2516 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2517 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2518 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2519 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2520 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2521 # Quintana Roo; represented by Cancún 2522 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2523 -6:00 - CST 1981 Dec 23 2524 -5:00 Mexico E%sT 1998 Aug 2 2:00 2525 -6:00 Mexico C%sT 2015 Feb 1 2:00 2526 -5:00 - EST 2527 # Campeche, Yucatán; represented by Mérida 2528 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2529 -6:00 - CST 1981 Dec 23 2530 -5:00 - EST 1982 Dec 2 2531 -6:00 Mexico C%sT 2532 # Coahuila, Nuevo León, Tamaulipas (near US border) 2533 # This includes the following municipalities: 2534 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, 2535 # Guerrero, Hidalgo. 2536 # in Nuevo León: Anáhuac, Los Aldama. 2537 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, 2538 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. 2539 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, 2540 # 2016-03-12 2541 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2542 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2543 -6:00 - CST 1988 2544 -6:00 US C%sT 1989 2545 -6:00 Mexico C%sT 2010 2546 -6:00 US C%sT 2547 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) 2548 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2549 -6:00 - CST 1988 2550 -6:00 US C%sT 1989 2551 -6:00 Mexico C%sT 2552 # Central Mexico 2553 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2554 -7:00 - MST 1927 Jun 10 23:00 2555 -6:00 - CST 1930 Nov 15 2556 -7:00 - MST 1931 May 1 23:00 2557 -6:00 - CST 1931 Oct 2558 -7:00 - MST 1932 Apr 1 2559 -6:00 Mexico C%sT 2001 Sep 30 2:00 2560 -6:00 - CST 2002 Feb 20 2561 -6:00 Mexico C%sT 2562 # Chihuahua (near US border) 2563 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, 2564 # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2565 # (See the 2016-03-12 El Universal source mentioned above.) 2566 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2567 -7:00 - MST 1927 Jun 10 23:00 2568 -6:00 - CST 1930 Nov 15 2569 -7:00 - MST 1931 May 1 23:00 2570 -6:00 - CST 1931 Oct 2571 -7:00 - MST 1932 Apr 1 2572 -6:00 - CST 1996 2573 -6:00 Mexico C%sT 1998 2574 -6:00 - CST 1998 Apr Sun>=1 3:00 2575 -7:00 Mexico M%sT 2010 2576 -7:00 US M%sT 2577 # Chihuahua (away from US border) 2578 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2579 -7:00 - MST 1927 Jun 10 23:00 2580 -6:00 - CST 1930 Nov 15 2581 -7:00 - MST 1931 May 1 23:00 2582 -6:00 - CST 1931 Oct 2583 -7:00 - MST 1932 Apr 1 2584 -6:00 - CST 1996 2585 -6:00 Mexico C%sT 1998 2586 -6:00 - CST 1998 Apr Sun>=1 3:00 2587 -7:00 Mexico M%sT 2588 # Sonora 2589 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2590 -7:00 - MST 1927 Jun 10 23:00 2591 -6:00 - CST 1930 Nov 15 2592 -7:00 - MST 1931 May 1 23:00 2593 -6:00 - CST 1931 Oct 2594 -7:00 - MST 1932 Apr 1 2595 -6:00 - CST 1942 Apr 24 2596 -7:00 - MST 1949 Jan 14 2597 -8:00 - PST 1970 2598 -7:00 Mexico M%sT 1999 2599 -7:00 - MST 2600 2601 # From Alexander Krivenyshev (2010-04-21): 2602 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2603 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2604 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2605 # 2606 # (Spanish) 2607 # Bahía de Banderas homologa su horario al del centro del 2608 # país, a partir de este domingo 2609 # http://www.nayarit.gob.mx/notes.asp?id=20748 2610 # 2611 # Bahía de Banderas homologa su horario con el del Centro del 2612 # País 2613 # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2614 # 2615 # (English) 2616 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2617 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2618 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2619 # 2620 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2621 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2622 # zone ..." 2623 # Baja California Sur, Nayarit, Sinaloa 2624 2625 # From Arthur David Olson (2010-05-01): 2626 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2627 2628 # Mazatlán 2629 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2630 -7:00 - MST 1927 Jun 10 23:00 2631 -6:00 - CST 1930 Nov 15 2632 -7:00 - MST 1931 May 1 23:00 2633 -6:00 - CST 1931 Oct 2634 -7:00 - MST 1932 Apr 1 2635 -6:00 - CST 1942 Apr 24 2636 -7:00 - MST 1949 Jan 14 2637 -8:00 - PST 1970 2638 -7:00 Mexico M%sT 2639 2640 # Bahía de Banderas 2641 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2642 -7:00 - MST 1927 Jun 10 23:00 2643 -6:00 - CST 1930 Nov 15 2644 -7:00 - MST 1931 May 1 23:00 2645 -6:00 - CST 1931 Oct 2646 -7:00 - MST 1932 Apr 1 2647 -6:00 - CST 1942 Apr 24 2648 -7:00 - MST 1949 Jan 14 2649 -8:00 - PST 1970 2650 -7:00 Mexico M%sT 2010 Apr 4 2:00 2651 -6:00 Mexico C%sT 2652 2653 # Baja California 2654 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2655 -7:00 - MST 1924 2656 -8:00 - PST 1927 Jun 10 23:00 2657 -7:00 - MST 1930 Nov 15 2658 -8:00 - PST 1931 Apr 1 2659 -8:00 1:00 PDT 1931 Sep 30 2660 -8:00 - PST 1942 Apr 24 2661 -8:00 1:00 PWT 1945 Aug 14 23:00u 2662 -8:00 1:00 PPT 1945 Nov 12 # Peace 2663 -8:00 - PST 1948 Apr 5 2664 -8:00 1:00 PDT 1949 Jan 14 2665 -8:00 - PST 1954 2666 -8:00 CA P%sT 1961 2667 -8:00 - PST 1976 2668 -8:00 US P%sT 1996 2669 -8:00 Mexico P%sT 2001 2670 -8:00 US P%sT 2002 Feb 20 2671 -8:00 Mexico P%sT 2010 2672 -8:00 US P%sT 2673 # From Paul Eggert (2006-03-22): 2674 # Formerly there was an America/Ensenada zone, which differed from 2675 # America/Tijuana only in that it did not observe DST from 1976 2676 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2677 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2678 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2679 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2680 # DST-observance was a town-by-town matter back then. This concerns 2681 # data after 1970 so most likely there should be at least one Zone 2682 # other than America/Tijuana for Baja, but it's not clear yet what its 2683 # name or contents should be. 2684 # 2685 # From Paul Eggert (2015-10-08): 2686 # Formerly there was an America/Santa_Isabel zone, but this appears to 2687 # have come from a misreading of 2688 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2689 # It has been moved to the 'backward' file. 2690 # 2691 # 2692 # Revillagigedo Is 2693 # no information 2694 2695 ############################################################################### 2696 2697 # Anguilla 2698 # Antigua and Barbuda 2699 # See America/Port_of_Spain. 2700 2701 # Bahamas 2702 # 2703 # For 1899 Milne gives -5:09:29.5; round that. 2704 # 2705 # From Sue Williams (2006-12-07): 2706 # The Bahamas announced about a month ago that they plan to change their DST 2707 # rules to sync with the U.S. starting in 2007.... 2708 # http://www.jonesbahamas.com/?c=45&a=10412 2709 2710 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2711 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2712 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2713 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2714 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2715 -5:00 Bahamas E%sT 1976 2716 -5:00 US E%sT 2717 2718 # Barbados 2719 2720 # For 1899 Milne gives -3:58:29.2; round that. 2721 2722 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2723 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2724 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2725 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2726 Rule Barb 1979 only - Sep 30 2:00 0 S 2727 Rule Barb 1980 only - Sep 25 2:00 0 S 2728 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2729 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2730 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2731 -4:00 Barb A%sT 2732 2733 # Belize 2734 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2735 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2736 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2737 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2738 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2739 Rule Belize 1974 only - Feb 9 0:00 0 S 2740 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2741 Rule Belize 1983 only - Feb 12 0:00 0 S 2742 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2743 Zone America/Belize -5:52:48 - LMT 1912 Apr 2744 -6:00 Belize C%sT 2745 2746 # Bermuda 2747 2748 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2749 # Bermuda dockyard, Ireland I; round that. 2750 2751 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2752 2753 # Next year, however, clocks in the US will go forward on the second Sunday 2754 # in March, until the first Sunday in November. And, after the Time Zone 2755 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2756 # Friday, the same thing will happen in Bermuda. 2757 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2758 2759 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2760 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2761 -4:00 - AST 1974 Apr 28 2:00 2762 -4:00 Canada A%sT 1976 2763 -4:00 US A%sT 2764 2765 # Cayman Is 2766 # See America/Panama. 2767 2768 # Costa Rica 2769 2770 # Milne gives -5:36:13.3 as San José mean time; round to nearest. 2771 2772 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2773 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2774 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2775 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2776 # IATA SSIM (1991-09) says the following was at 1:00; 2777 # go with Shanks & Pottenger. 2778 Rule CR 1991 only - Jul 1 0:00 0 S 2779 Rule CR 1992 only - Mar 15 0:00 0 S 2780 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2781 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2782 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2783 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2784 -6:00 CR C%sT 2785 # Coco 2786 # no information; probably like America/Costa_Rica 2787 2788 # Cuba 2789 2790 # From Paul Eggert (2013-02-21): 2791 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2792 # for the port, and -5:30 for meteorological observations. 2793 # For now, stick with Shanks & Pottenger. 2794 2795 # From Arthur David Olson (1999-03-29): 2796 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2797 # the Cuban National Team and the Baltimore Orioles was carried live on 2798 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2799 # During the game, play-by-play announcer Jim Hunter noted that 2800 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2801 # Time today." (The "two hour" remark referred to losing one hour of 2802 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2803 # to DST - and one more hour on 1999-04-04 - when the announcers will have 2804 # returned to Baltimore, which switches on that date.) 2805 2806 # From Steffen Thorsen (2013-11-11): 2807 # DST start in Cuba in 2004 ... does not follow the same rules as the 2808 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2809 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2810 2811 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2812 # Cuba is not going back to standard time this year. 2813 # From Paul Eggert (2006-03-22): 2814 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2815 # says that it's due to a problem at the Antonio Guiteras 2816 # thermoelectric plant, and says "This October there will be no return 2817 # to normal hours (after daylight saving time)". 2818 # For now, let's assume that it's a temporary measure. 2819 2820 # From Carlos A. Carnero Delgado (2005-11-12): 2821 # This year (just like in 2004-2005) there's no change in time zone 2822 # adjustment in Cuba. We will stay in daylight saving time: 2823 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2824 2825 # From Jesper Nørgaard Welen (2006-10-21): 2826 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2827 # the 3 years of permanent DST next weekend, see 2828 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2829 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2830 # watches should be set back one hour - going back to 00:00 hours - returning 2831 # to the normal schedule.... 2832 2833 # From Paul Eggert (2007-03-02): 2834 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2835 # says Cuban clocks will advance at midnight on March 10. 2836 # For lack of better information, assume Cuba will use US rules, 2837 # except that it switches at midnight standard time as usual. 2838 # 2839 # From Steffen Thorsen (2007-10-25): 2840 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2841 # earlier - on the last Sunday of October, just like in 2006. 2842 # 2843 # He supplied these references: 2844 # 2845 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2846 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2847 # 2848 # From Alex Krivenyshev (2007-10-25): 2849 # Here is also article from Granma (Cuba): 2850 # 2851 # Regirá el Horario Normal desde el próximo domingo 28 de octubre 2852 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2853 # 2854 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2855 2856 # From Arthur David Olson (2008-03-09): 2857 # I'm in Maryland which is now observing United States Eastern Daylight 2858 # Time. At 9:44 local time I used RealPlayer to listen to 2859 # http://media.enet.cu/radioreloj 2860 # a Cuban information station, and heard 2861 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2862 # indicating that Cuba is still on standard time. 2863 2864 # From Steffen Thorsen (2008-03-12): 2865 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2866 # It was announced yesterday, according to this source (in Spanish): 2867 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2868 # 2869 # Some more background information is posted here: 2870 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2871 # 2872 # The article also says that Cuba has been observing DST since 1963, 2873 # while Shanks (and tzdata) has 1965 as the first date (except in the 2874 # 1940's). Many other web pages in Cuba also claim that it has been 2875 # observed since 1963, but with the exception of 1970 - an exception 2876 # which is not present in tzdata/Shanks. So there is a chance we need to 2877 # change some historic records as well. 2878 # 2879 # One example: 2880 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2881 2882 # From Jesper Nørgaard Welen (2008-03-13): 2883 # The Cuban time change has just been confirmed on the most authoritative 2884 # web site, the Granma. Please check out 2885 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2886 # 2887 # Basically as expected after Steffen Thorsen's information, the change 2888 # will take place midnight between Saturday and Sunday. 2889 2890 # From Arthur David Olson (2008-03-12): 2891 # Assume Sun>=15 (third Sunday) going forward. 2892 2893 # From Alexander Krivenyshev (2009-03-04) 2894 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2895 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2896 # not on midnight March 14 / March 15 as previously thought. 2897 # 2898 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2899 # (in Spanish) 2900 2901 # From Arthur David Olson (2009-03-09) 2902 # I listened over the Internet to 2903 # http://media.enet.cu/readioreloj 2904 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2905 # the time was announced as "diez cinco" - the same time as here, indicating 2906 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2907 2908 # From Steffen Thorsen (2011-03-08): 2909 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2910 # this year. Nothing about the end date known so far (if that has 2911 # changed at all). 2912 # 2913 # Source: 2914 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2915 # 2916 # Our info: 2917 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2918 # 2919 # From Steffen Thorsen (2011-10-30) 2920 # Cuba will end DST two weeks later this year. Instead of going back 2921 # tonight, it has been delayed to 2011-11-13 at 01:00. 2922 # 2923 # One source (Spanish) 2924 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2925 # 2926 # Our page: 2927 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2928 # 2929 # From Steffen Thorsen (2012-03-01) 2930 # According to Radio Reloj, Cuba will start DST on Midnight between March 2931 # 31 and April 1. 2932 # 2933 # Radio Reloj has the following info (Spanish): 2934 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2935 # 2936 # Our info on it: 2937 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2938 2939 # From Steffen Thorsen (2012-11-03): 2940 # Radio Reloj and many other sources report that Cuba is changing back 2941 # to standard time on 2012-11-04: 2942 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2943 # From Paul Eggert (2012-11-03): 2944 # For now, assume the future rule is first Sunday in November. 2945 2946 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2947 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2948 Rule Cuba 1928 only - Oct 10 0:00 0 S 2949 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2950 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2951 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2952 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2953 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2954 Rule Cuba 1965 only - Sep 30 0:00 0 S 2955 Rule Cuba 1966 only - May 29 0:00 1:00 D 2956 Rule Cuba 1966 only - Oct 2 0:00 0 S 2957 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2958 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2959 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2960 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2961 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2962 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2963 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2964 Rule Cuba 1978 only - May 7 0:00 1:00 D 2965 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2966 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2967 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2968 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2969 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2970 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2971 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2972 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2973 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2974 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2975 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2976 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2977 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2978 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2979 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2980 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2981 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2982 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2983 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2984 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2985 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2986 2987 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2988 Zone America/Havana -5:29:28 - LMT 1890 2989 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2990 -5:00 Cuba C%sT 2991 2992 # Dominica 2993 # See America/Port_of_Spain. 2994 2995 # Dominican Republic 2996 2997 # From Steffen Thorsen (2000-10-30): 2998 # Enrique Morales reported to me that the Dominican Republic has changed the 2999 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 3000 # http://www.listin.com.do/antes/261000/republica/princi.html 3001 3002 # From Paul Eggert (2000-12-04): 3003 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 3004 3005 # From Rives McDow (2000-12-01): 3006 # Dominican Republic changed its mind and presidential decree on Tuesday, 3007 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 3008 # Dominican Republic will be reverting to 8 hours from the International Date 3009 # Line, and will not be using DST in the foreseeable future. The reason they 3010 # decided to use DST was to be in synch with Puerto Rico, who was also going 3011 # to implement DST. When Puerto Rico didn't implement DST, the president 3012 # decided to revert. 3013 3014 3015 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3016 Rule DR 1966 only - Oct 30 0:00 1:00 D 3017 Rule DR 1967 only - Feb 28 0:00 0 S 3018 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 3019 Rule DR 1970 only - Feb 21 0:00 0 S 3020 Rule DR 1971 only - Jan 20 0:00 0 S 3021 Rule DR 1972 1974 - Jan 21 0:00 0 S 3022 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3023 Zone America/Santo_Domingo -4:39:36 - LMT 1890 3024 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3025 -5:00 DR E%sT 1974 Oct 27 3026 -4:00 - AST 2000 Oct 29 2:00 3027 -5:00 US E%sT 2000 Dec 3 1:00 3028 -4:00 - AST 3029 3030 # El Salvador 3031 3032 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3033 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 3034 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 3035 # There are too many San Salvadors elsewhere, so use America/El_Salvador 3036 # instead of America/San_Salvador. 3037 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3038 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 3039 -6:00 Salv C%sT 3040 3041 # Grenada 3042 # Guadeloupe 3043 # St Barthélemy 3044 # St Martin (French part) 3045 # See America/Port_of_Spain. 3046 3047 # Guatemala 3048 # 3049 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3050 # Diario Co Latino, at 3051 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3052 # says in an article dated 2006-04-19 that the Guatemalan government had 3053 # decided on that date to advance official time by 60 minutes, to lessen the 3054 # impact of the elevated cost of oil.... Daylight saving time will last from 3055 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3056 # From Paul Eggert (2006-06-22): 3057 # The Ministry of Energy and Mines, press release CP-15/2006 3058 # (2006-04-19), says DST ends at 24:00. See 3059 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3060 3061 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3062 Rule Guat 1973 only - Nov 25 0:00 1:00 D 3063 Rule Guat 1974 only - Feb 24 0:00 0 S 3064 Rule Guat 1983 only - May 21 0:00 1:00 D 3065 Rule Guat 1983 only - Sep 22 0:00 0 S 3066 Rule Guat 1991 only - Mar 23 0:00 1:00 D 3067 Rule Guat 1991 only - Sep 7 0:00 0 S 3068 Rule Guat 2006 only - Apr 30 0:00 1:00 D 3069 Rule Guat 2006 only - Oct 1 0:00 0 S 3070 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3071 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3072 -6:00 Guat C%sT 3073 3074 # Haiti 3075 # From Gwillim Law (2005-04-15): 3076 # Risto O. Nykänen wrote me that Haiti is now on DST. 3077 # I searched for confirmation, and I found a press release 3078 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3079 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3080 # 3081 # "The Prime Minister's Communication Office notifies the public in general 3082 # and the press in particular that, following a decision of the Interior 3083 # Ministry and the Territorial Collectivities [I suppose that means the 3084 # provinces], Haiti will move to Eastern Daylight Time in the night from next 3085 # Saturday the 2nd to Sunday the 3rd. 3086 # 3087 # "Consequently, the Prime Minister's Communication Office wishes to inform 3088 # the population that the country's clocks will be set forward one hour 3089 # starting at midnight. This provision will hold until the last Saturday in 3090 # October 2005. 3091 # 3092 # "Port-au-Prince, March 31, 2005" 3093 # 3094 # From Steffen Thorsen (2006-04-04): 3095 # I have been informed by users that Haiti observes DST this year like 3096 # last year, so the current "only" rule for 2005 might be changed to a 3097 # "max" rule or to last until 2006. (Who knows if they will observe DST 3098 # next year or if they will extend their DST like US/Canada next year). 3099 # 3100 # I have found this article about it (in French): 3101 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 3102 # 3103 # The reason seems to be an energy crisis. 3104 3105 # From Stephen Colebourne (2007-02-22): 3106 # Some IATA info: Haiti won't be having DST in 2007. 3107 3108 # From Steffen Thorsen (2012-03-11): 3109 # According to several news sources, Haiti will observe DST this year, 3110 # apparently using the same start and end date as USA/Canada. 3111 # So this means they have already changed their time. 3112 # 3113 # http://www.alterpresse.org/spip.php?article12510 3114 # http://radiovision2000haiti.net/home/?p=13253 3115 # 3116 # From Arthur David Olson (2012-03-11): 3117 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3118 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 3119 # Assume a US-style fall back as well. 3120 3121 # From Steffen Thorsen (2013-03-10): 3122 # It appears that Haiti is observing DST this year as well, same rules 3123 # as US/Canada. They did it last year as well, and it looks like they 3124 # are going to observe DST every year now... 3125 # 3126 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3127 # http://www.canalplushaiti.net/?p=6714 3128 3129 # From Steffen Thorsen (2016-03-12): 3130 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3131 # are not going on DST this year. Several other resources confirm this: ... 3132 # http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3133 # http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3134 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3135 3136 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3137 Rule Haiti 1983 only - May 8 0:00 1:00 D 3138 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3139 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3140 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3141 # Go with IATA. 3142 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3143 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3144 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3145 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3146 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3147 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3148 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3149 Zone America/Port-au-Prince -4:49:20 - LMT 1890 3150 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3151 -5:00 Haiti E%sT 3152 3153 # Honduras 3154 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3155 3156 # From Paul Eggert (2006-05-05): 3157 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3158 # saying Honduras will start using DST midnight Saturday, effective 4 3159 # months until September. La Tribuna reported today 3160 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3161 # of Honduras, refused to back down on this. 3162 3163 # From Jesper Nørgaard Welen (2006-08-08): 3164 # It seems that Honduras has returned from DST to standard time this Monday at 3165 # 00:00 hours (prolonging Sunday to 25 hours duration). 3166 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3167 3168 # From Paul Eggert (2006-08-08): 3169 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3170 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3171 # It mentions executive decree 18-2006. 3172 3173 # From Steffen Thorsen (2006-08-17): 3174 # Honduras will observe DST from 2007 to 2009, exact dates are not 3175 # published, I have located this authoritative source: 3176 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 3177 3178 # From Steffen Thorsen (2007-03-30): 3179 # http://www.laprensahn.com/pais_nota.php?id04962=7386 3180 # So it seems that Honduras will not enter DST this year.... 3181 3182 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3183 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3184 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3185 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3186 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3187 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3188 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3189 -6:00 Hond C%sT 3190 # 3191 # Great Swan I ceded by US to Honduras in 1972 3192 3193 # Jamaica 3194 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3195 # unspecified official document, and says "This time is used throughout the 3196 # island". Go with Milne. Round to the nearest second as required by zic. 3197 # 3198 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3199 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3200 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3201 # Manley's supporters associated this act with Manley's nickname "Joshua" 3202 # (recall that in the Bible the sun stood still at Joshua's request), 3203 # and with the Rod of Correction which Manley said he had received from 3204 # Haile Selassie, Emperor of Ethiopia. See: 3205 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3206 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3207 # 3208 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3209 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3210 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3211 -5:00 - EST 1974 3212 -5:00 US E%sT 1984 3213 -5:00 - EST 3214 3215 # Martinique 3216 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3217 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3218 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3219 -4:00 - AST 1980 Apr 6 3220 -4:00 1:00 ADT 1980 Sep 28 3221 -4:00 - AST 3222 3223 # Montserrat 3224 # See America/Port_of_Spain. 3225 3226 # Nicaragua 3227 # 3228 # This uses Shanks & Pottenger for times before 2005. 3229 # 3230 # From Steffen Thorsen (2005-04-12): 3231 # I've got reports from 8 different people that Nicaragua just started 3232 # DST on Sunday 2005-04-10, in order to save energy because of 3233 # expensive petroleum. The exact end date for DST is not yet 3234 # announced, only "September" but some sites also say "mid-September". 3235 # Some background information is available on the President's official site: 3236 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3237 # The Decree, no 23-2005 is available here: 3238 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf 3239 # 3240 # From Paul Eggert (2005-05-01): 3241 # The decree doesn't say anything about daylight saving, but for now let's 3242 # assume that it is daylight saving.... 3243 # 3244 # From Gwillim Law (2005-04-21): 3245 # The Associated Press story on the time change, which can be found at 3246 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3247 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3248 # time that a change of clocks was applied to save energy was in the year 2000 3249 # during the Arnoldo Alemán administration."... 3250 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3251 # since December 1998. I wasn't able to find any details of Nicaraguan time 3252 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3253 # the effect that we have indirect evidence that DST was observed in 2000. 3254 # 3255 # From Jesper Nørgaard Welen (2005-11-02): 3256 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3257 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3258 # (2005-09-26) 3259 # 3260 # From Jesper Nørgaard Welen (2006-05-05): 3261 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3262 # (my informal translation) 3263 # By order of the president of the republic, Enrique Bolaños, Nicaragua 3264 # advanced by sixty minutes their official time, yesterday at 2 in the 3265 # morning, and will stay that way until 30th of September. 3266 # 3267 # From Jesper Nørgaard Welen (2006-09-30): 3268 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3269 # My informal translation runs: 3270 # The natural sun time is restored in all the national territory, in that the 3271 # time is returned one hour at 01:00 am of October 1 of 2006. 3272 # 3273 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3274 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3275 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3276 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3277 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3278 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3279 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3280 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3281 Zone America/Managua -5:45:08 - LMT 1890 3282 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3283 -6:00 - CST 1973 May 3284 -5:00 - EST 1975 Feb 16 3285 -6:00 Nic C%sT 1992 Jan 1 4:00 3286 -5:00 - EST 1992 Sep 24 3287 -6:00 - CST 1993 3288 -5:00 - EST 1997 3289 -6:00 Nic C%sT 3290 3291 # Panama 3292 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3293 Zone America/Panama -5:18:08 - LMT 1890 3294 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3295 -5:00 - EST 3296 Link America/Panama America/Cayman 3297 3298 # Puerto Rico 3299 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3300 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3301 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3302 -4:00 - AST 1942 May 3 3303 -4:00 US A%sT 1946 3304 -4:00 - AST 3305 3306 # St Kitts-Nevis 3307 # St Lucia 3308 # See America/Port_of_Spain. 3309 3310 # St Pierre and Miquelon 3311 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3312 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3313 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3314 -4:00 - AST 1980 May 3315 -3:00 - PMST 1987 # Pierre & Miquelon Time 3316 -3:00 Canada PM%sT 3317 3318 # St Vincent and the Grenadines 3319 # See America/Port_of_Spain. 3320 3321 # Turks and Caicos 3322 # 3323 # From Chris Dunn in 3324 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3325 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3326 # daylight saving dates for time changes have been adjusted to match 3327 # the recent U.S. change of dates. 3328 # 3329 # From Brian Inglis (2007-04-28): 3330 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3331 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3332 # rows before that there is an out of date entry for Oct: 3333 # "Eastern Standard Times Begins 2007 3334 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3335 # indicating that the normal ET rules are followed. 3336 # 3337 # From Paul Eggert (2014-08-19): 3338 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3339 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3340 # Model this as a switch from EST/EDT to AST ... 3341 # From Chris Walton (2014-11-04): 3342 # ... the TCI government appears to have delayed the switch to 3343 # "permanent daylight saving time" by one year.... 3344 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3345 # 3346 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3347 Zone America/Grand_Turk -4:44:32 - LMT 1890 3348 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3349 -5:00 - EST 1979 3350 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3351 -4:00 - AST 3352 3353 # British Virgin Is 3354 # Virgin Is 3355 # See America/Port_of_Spain. 3356 3357 3358 # Local Variables: 3359 # coding: utf-8 3360 # End: