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