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 51 # From Paul Eggert (2016-09-21): 52 # Dowd's proposal left many details unresolved, such as where to draw 53 # lines between time zones. The key individual who made time zones 54 # work in the US was William Frederick Allen - railway engineer, 55 # managing editor of the Travelers' Guide, and secretary of the 56 # General Time Convention, a railway standardization group. Allen 57 # spent months in dialogs with scientific and railway leaders, 58 # developed a workable plan to institute time zones, and presented it 59 # to the General Time Convention on 1883-04-11, saying that his plan 60 # meant "local time would be practically abolished" - a plus for 61 # railway scheduling. By the next convention on 1883-10-11 nearly all 62 # railroads had agreed and it took effect on 1883-11-18 at 12:00. 63 # That Sunday was called the "day of two noons", as the eastern parts 64 # of the new zones observed noon twice. Allen witnessed the 65 # transition in New York City, writing: 66 # 67 # I heard the bells of St. Paul's strike on the old time. Four 68 # minutes later, obedient to the electrical signal from the Naval 69 # Observatory ... the time-ball made its rapid descent, the chimes 70 # of old Trinity rang twelve measured strokes, and local time was 71 # abandoned, probably forever. 72 # 73 # Most of the US soon followed suit. See: 74 # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 75 # http://dx.doi.org/10.2307/3105430 76 77 # From Paul Eggert (2005-04-16): 78 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 79 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 80 81 # From Paul Eggert (2006-03-22): 82 # A good source for time zone historical data in the US is 83 # Thomas G. Shanks, The American Atlas (5th edition), 84 # San Diego: ACS Publications, Inc. (1991). 85 # Make sure you have the errata sheet; the book is somewhat useless without it. 86 # It is the source for most of the pre-1991 US entries below. 87 88 # From Paul Eggert (2001-03-06): 89 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 90 # in his whimsical essay "An Economical Project for Diminishing the Cost 91 # of Light" published in the Journal de Paris (1784-04-26). 92 # Not everyone is happy with the results: 93 # 94 # I don't really care how time is reckoned so long as there is some 95 # agreement about it, but I object to being told that I am saving 96 # daylight when my reason tells me that I am doing nothing of the kind. 97 # I even object to the implication that I am wasting something 98 # valuable if I stay in bed after the sun has risen. As an admirer 99 # of moonlight I resent the bossy insistence of those who want to 100 # reduce my time for enjoying it. At the back of the Daylight Saving 101 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 102 # to push people into bed earlier, and get them up earlier, to make 103 # them healthy, wealthy and wise in spite of themselves. 104 # 105 # -- Robertson Davies, The diary of Samuel Marchbanks, 106 # Clarke, Irwin (1947), XIX, Sunday 107 # 108 # For more about the first ten years of DST in the United States, see 109 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 110 # (Carnegie Library of Pittsburgh, 1927). 111 # http://www.clpgh.org/exhibit/dst.html 112 # 113 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 114 # However, DST was imposed by the Standard Time Act of 1918, which 115 # was the first nationwide legal time standard, and apparently 116 # time was just called "Standard Time" or "Daylight Saving Time". 117 118 # From Arthur David Olson: 119 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 120 # See, for example, the front page of the Saturday, 1974-10-26 121 # and Sunday, 1974-10-27 editions of the Washington Post. 122 123 # From Arthur David Olson: 124 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 125 # Daylight Saving Time in the US was by local option, except during wartime. 126 127 # From Arthur David Olson (2000-09-25): 128 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 129 # In the introduction, Oboler spoke of "Eastern Peace Time." 130 # An AltaVista search turned up: 131 # http://rowayton.org/rhs/hstaug45.html 132 # "When the time is announced over the radio now, it is 'Eastern Peace 133 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 134 # (August 1945) by way of confirmation. 135 136 # From Joseph Gallant citing 137 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 138 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 139 # to switch to London for Attlee's address, but the American people 140 # never got to hear his speech live. According to one press account, 141 # CBS' Bob Trout was first to announce the word of Japan's surrender, 142 # but a few seconds later, NBC, ABC and Mutual also flashed the word 143 # of surrender, all of whom interrupting the bells of Big Ben in 144 # London which were to precede Mr. Attlee's speech. 145 146 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 147 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 148 # 149 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 150 # Any announcement from Asia would reach St. John's New York newsroom on a 151 # wire service teletype machine, which had prescribed signals for major news. 152 # Associated Press, for example, would ring five bells before spewing out 153 # typed copy of an important story, and 10 bells for news "of transcendental 154 # importance." 155 # 156 # On Aug. 14, stalling while talking steadily into the NBC networks' open 157 # microphone, St. John heard five bells and waited only to hear a sixth bell, 158 # before announcing confidently: "Ladies and gentlemen, World War II is over. 159 # The Japanese have agreed to our surrender terms." 160 # 161 # He had scored a 20-second scoop on other broadcasters. 162 163 # From Arthur David Olson (2005-08-22): 164 # Paul has been careful to use the "US" rules only in those locations 165 # that are part of the United States; this reflects the real scope of 166 # U.S. government action. So even though the "US" rules have changed 167 # in the latest release, other countries won't be affected. 168 169 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 170 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 171 Rule US 1918 1919 - Oct lastSun 2:00 0 S 172 Rule US 1942 only - Feb 9 2:00 1:00 W # War 173 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 174 Rule US 1945 only - Sep lastSun 2:00 0 S 175 Rule US 1967 2006 - Oct lastSun 2:00 0 S 176 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 177 Rule US 1974 only - Jan 6 2:00 1:00 D 178 Rule US 1975 only - Feb 23 2:00 1:00 D 179 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 180 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 181 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 182 Rule US 2007 max - Nov Sun>=1 2:00 0 S 183 184 # From Arthur David Olson, 2005-12-19 185 # We generate the files specified below to guard against old files with 186 # obsolete information being left in the time zone binary directory. 187 # We limit the list to names that have appeared in previous versions of 188 # this time zone package. 189 # We do these as separate Zones rather than as Links to avoid problems if 190 # a particular place changes whether it observes DST. 191 # We put these specifications here in the northamerica file both to 192 # increase the chances that they'll actually get compiled and to 193 # avoid the need to duplicate the US rules in another file. 194 195 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 196 Zone EST -5:00 - EST 197 Zone MST -7:00 - MST 198 Zone HST -10:00 - HST 199 Zone EST5EDT -5:00 US E%sT 200 Zone CST6CDT -6:00 US C%sT 201 Zone MST7MDT -7:00 US M%sT 202 Zone PST8PDT -8:00 US P%sT 203 204 # From U. S. Naval Observatory (1989-01-19): 205 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 206 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 207 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 208 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 209 # USA MOUNTAIN 7 H BEHIND UTC DENVER 210 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 211 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 212 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 213 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 214 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 215 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 216 # USA " 9 H BEHIND UTC APR 3 - OCT 30 217 # USA HAWAII 10 H BEHIND UTC 218 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 219 220 # From Arthur David Olson (1989-01-21): 221 # The above dates are for 1988. 222 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 223 # no DST in Samoa, and the claim that there is DST in Alaska and the 224 # Aleutians. 225 226 # From Arthur David Olson (1988-02-13): 227 # Legal standard time zone names, from United States Code (1982 Edition and 228 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 229 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 230 # took effect), as explained in sections 263 and 261: 231 # (none) 232 # United States standard eastern time 233 # United States standard mountain time 234 # United States standard central time 235 # United States standard Pacific time 236 # (none) 237 # United States standard Alaska time 238 # (none) 239 # Next, names from 1967-04-01 until 1983-11-30 (the date for 240 # public law 98-181): 241 # Atlantic standard time 242 # eastern standard time 243 # central standard time 244 # mountain standard time 245 # Pacific standard time 246 # Yukon standard time 247 # Alaska-Hawaii standard time 248 # Bering standard time 249 # And after 1983-11-30: 250 # Atlantic standard time 251 # eastern standard time 252 # central standard time 253 # mountain standard time 254 # Pacific standard time 255 # Alaska standard time 256 # Hawaii-Aleutian standard time 257 # Samoa standard time 258 # The law doesn't give abbreviations. 259 # 260 # From Paul Eggert (2016-12-19): 261 # Here are URLs for the 1918 and 1966 legislation: 262 # http://uscode.house.gov/statviewer.htm?volume=40&page=451 263 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 264 # Although the 1918 names were officially "United States Standard 265 # Eastern Time" and similarly for "Central", "Mountain", "Pacific", 266 # and "Alaska", in practice "Standard" was placed just before "Time", 267 # as codified in 1966. In practice, Alaska time was abbreviated "AST" 268 # before 1968. Summarizing the 1967 name changes: 269 # 1918 names 1967 names 270 # -08 Standard Pacific Time (PST) Pacific standard time (PST) 271 # -09 (unofficial) Yukon (YST) Yukon standard time (YST) 272 # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) 273 # -11 (unofficial) Nome (NST) Bering standard time (BST) 274 # 275 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 276 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 277 # for time in Guam and the Northern Marianas. See the file "australasia". 278 # 279 # From Paul Eggert (2015-04-17): 280 # HST and HDT are standardized abbreviations for Hawaii-Aleutian 281 # standard and daylight times. See section 9.47 (p 234) of the 282 # U.S. Government Printing Office Style Manual (2008) 283 # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 284 285 # From Arthur David Olson, 2005-08-09 286 # The following was signed into law on 2005-08-08. 287 # 288 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 289 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 290 # U.S.C. 260a(a)) is amended-- 291 # (1) by striking "first Sunday of April" and inserting "second 292 # Sunday of March"; and 293 # (2) by striking "last Sunday of October" and inserting "first 294 # Sunday of November'. 295 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the 296 # date of enactment of this Act or March 1, 2007, whichever is later. 297 # (c) Report to Congress.--Not later than 9 months after the effective 298 # date stated in subsection (b), the Secretary shall report to Congress 299 # on the impact of this section on energy consumption in the United 300 # States. 301 # (d) Right to Revert.--Congress retains the right to revert the 302 # Daylight Saving Time back to the 2005 time schedules once the 303 # Department study is complete. 304 305 # US eastern time, represented by New York 306 307 # Connecticut, Delaware, District of Columbia, most of Florida, 308 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 309 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 310 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 311 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 312 # Vermont, Virginia, West Virginia 313 314 # From Dave Cantor (2004-11-02): 315 # Early this summer I had the occasion to visit the Mount Washington 316 # Observatory weather station atop (of course!) Mount Washington [, NH].... 317 # One of the staff members said that the station was on Eastern Standard Time 318 # and didn't change their clocks for Daylight Saving ... so that their 319 # reports will always have times which are 5 hours behind UTC. 320 321 # From Paul Eggert (2005-08-26): 322 # According to today's Huntsville Times 323 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 324 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 325 # in Russell County, Lanett in Chambers County and some towns in Lee County, 326 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 327 # Roberts, city administrator in Phenix City. as saying "We are in the Central 328 # time zone, but we do go by the Eastern time zone because so many people work 329 # in Columbus." 330 # 331 # From Paul Eggert (2017-02-22): 332 # Four cities are involved. The two not mentioned above are Smiths Station 333 # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started 334 # because West Point Pepperell textile mills were in Alabama while the 335 # corporate office was in Georgia, and residents voted to keep Eastern 336 # time even after the mills closed. See: Kazek K. Did you know which 337 # Alabama towns are in a different time zone? al.com 2017-02-06. 338 # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html 339 340 # From Paul Eggert (2014-09-06): 341 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 342 # says that New York City Hall time was 3 minutes 58.4 seconds fast of 343 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 344 # nearest second. 345 346 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 347 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 348 Rule NYC 1920 only - Oct lastSun 2:00 0 S 349 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 350 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 351 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 352 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 353 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 354 -5:00 US E%sT 1920 355 -5:00 NYC E%sT 1942 356 -5:00 US E%sT 1946 357 -5:00 NYC E%sT 1967 358 -5:00 US E%sT 359 360 # US central time, represented by Chicago 361 362 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 363 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 364 # Washington counties), Illinois, western Indiana 365 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 366 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 367 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 368 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 369 # western Tennessee, most of Texas, Wisconsin 370 371 # From Larry M. Smith (2006-04-26) re Wisconsin: 372 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 373 # is currently enforced at the 01:00 time of change. Because the local 374 # "bar time" in the state corresponds to 02:00, a number of citations 375 # are issued for the "sale of class 'B' alcohol after prohibited 376 # hours" within the deviated hour of this change every year.... 377 # 378 # From Douglas R. Bomberg (2007-03-12): 379 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 380 # Statue 175 closer in synch with the US Congress' intent.... 381 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 382 383 # From an email administrator of the City of Fort Pierre, SD (2015-12-21): 384 # Fort Pierre is technically located in the Mountain time zone as is 385 # the rest of Stanley County. Most of Stanley County and Fort Pierre 386 # uses the Central time zone due to doing most of their business in 387 # Pierre so it simplifies schedules. I have lived in Stanley County 388 # all my life and it has been that way since I can remember. (43 years!) 389 # 390 # From Paul Eggert (2015-12-25): 391 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 392 393 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 394 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 395 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 396 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 397 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 398 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 399 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 400 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 401 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 402 -6:00 US C%sT 1920 403 -6:00 Chicago C%sT 1936 Mar 1 2:00 404 -5:00 - EST 1936 Nov 15 2:00 405 -6:00 Chicago C%sT 1942 406 -6:00 US C%sT 1946 407 -6:00 Chicago C%sT 1967 408 -6:00 US C%sT 409 # Oliver County, ND switched from mountain to central time on 1992-10-25. 410 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 411 -7:00 US M%sT 1992 Oct 25 2:00 412 -6:00 US C%sT 413 # Morton County, ND, switched from mountain to central time on 414 # 2003-10-26, except for the area around Mandan which was already central time. 415 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 416 # Officially this switch also included part of Sioux County, and 417 # Jones, Mellette, and Todd Counties in South Dakota; 418 # but in practice these other counties were already observing central time. 419 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 420 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 421 -7:00 US M%sT 2003 Oct 26 2:00 422 -6:00 US C%sT 423 424 # From Josh Findley (2011-01-21): 425 # ...it appears that Mercer County, North Dakota, changed from the 426 # mountain time zone to the central time zone at the last transition from 427 # daylight-saving to standard time (on Nov. 7, 2010): 428 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 429 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 430 431 # From Andy Lipscomb (2011-01-24): 432 # ...according to the Census Bureau, the largest city is Beulah (although 433 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 434 # largest city in Mercer County). Google Maps places Beulah's city hall 435 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 436 # of 6h47'07". 437 438 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 439 -7:00 US M%sT 2010 Nov 7 2:00 440 -6:00 US C%sT 441 442 # US mountain time, represented by Denver 443 # 444 # Colorado, far western Kansas, Montana, western 445 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 446 # New Mexico, southwestern North Dakota, 447 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 448 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 449 # 450 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 451 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 452 Rule Denver 1920 only - Oct lastSun 2:00 0 S 453 Rule Denver 1921 only - May 22 2:00 0 S 454 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 455 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 456 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 457 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 458 -7:00 US M%sT 1920 459 -7:00 Denver M%sT 1942 460 -7:00 US M%sT 1946 461 -7:00 Denver M%sT 1967 462 -7:00 US M%sT 463 464 # US Pacific time, represented by Los Angeles 465 # 466 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 467 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 468 # north of the Salmon River, and the towns of Burgdorf and Warren), 469 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 470 # Malheur county), and Washington 471 472 # From Paul Eggert (2016-08-20): 473 # In early February 1948, in response to California's electricity shortage, 474 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 475 # causing electric clocks to lose six minutes per day. (This did not change 476 # legal time, and is not part of the data here.) See: 477 # Ross SA. An energy crisis from the past: Northern California in 1948. 478 # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 479 # 1973-11. http://escholarship.org/uc/item/8x22k30c 480 # 481 # In another measure to save electricity, DST was instituted from 1948-03-14 482 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 483 # the fallback transition earlier. See pages 3-4 of: 484 # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 485 # 486 # In response: 487 # 488 # Governor Warren received a torrent of objecting mail, and it is not too much 489 # to speculate that the objections to Daylight Saving Time were one important 490 # factor in the defeat of the Dewey-Warren Presidential ticket in California. 491 # -- Ross, p 25 492 # 493 # On December 8 the governor exercised the option, setting the date to January 1 494 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 495 # 496 # Despite the controversy, in 1949 California voters approved Proposition 12, 497 # which established DST from April's last Sunday at 01:00 until September's 498 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 499 # the fall-back date to October's last Sunday. See: 500 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 501 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 502 # 503 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 504 Rule CA 1948 only - Mar 14 2:01 1:00 D 505 Rule CA 1949 only - Jan 1 2:00 0 S 506 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D 507 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 508 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 509 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 510 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 511 -8:00 US P%sT 1946 512 -8:00 CA P%sT 1967 513 -8:00 US P%sT 514 515 # Alaska 516 # AK%sT is the modern abbreviation for -09 per USNO. 517 # 518 # From Paul Eggert (2001-05-30): 519 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 520 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 521 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 522 # also a Friday. Include only the time zone part of this transition, 523 # ignoring the switch from Julian to Gregorian, since we can't represent 524 # the Julian calendar. 525 # 526 # As far as we know, none of the exact locations mentioned below were 527 # permanently inhabited in 1867 by anyone using either calendar. 528 # (Yakutat was colonized by the Russians in 1799, but the settlement 529 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 530 # were nearby inhabitants in some cases and for our purposes perhaps 531 # it's best to simply use the official transition. 532 533 # From Paul Eggert (2014-07-18): 534 # One opinion of the early-1980s turmoil in Alaska over time zones and 535 # daylight saving time appeared as graffiti on a Juneau airport wall: 536 # "Welcome to Juneau. Please turn your watch back to the 19th century." 537 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 538 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 539 # 540 # Steve Ferguson (2011-01-31) referred to the following source: 541 # Norris F. Keeping time in Alaska: national directives, local response. 542 # Alaska History 2001;16(1-2). 543 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 544 545 # From Arthur David Olson (2011-02-01): 546 # Here's database-relevant material from the 2001 "Alaska History" article: 547 # 548 # On September 20 [1979]...DOT...officials decreed that on April 27, 549 # 1980, Juneau and other nearby communities would move to Yukon Time. 550 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 551 # Pacific Time. 552 # 553 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 554 # Department's September 1979 decision. Juneau and other communities in 555 # northern Southeast reverted to Pacific Time on October 26. 556 # 557 # On October 28 [1983]...the Metlakatla Indian Community Council voted 558 # unanimously to keep the reservation on Pacific Time. 559 # 560 # According to DOT official Joanne Petrie, Indian reservations are not 561 # bound to follow time zones imposed by neighboring jurisdictions. 562 # 563 # (The last is consistent with how the database now handles the Navajo 564 # Nation.) 565 566 # From Arthur David Olson (2011-02-09): 567 # I just spoke by phone with a staff member at the Metlakatla Indian 568 # Community office (using contact information available at 569 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 570 # It's shortly after 1:00 here on the east coast of the United States; 571 # the staffer said it was shortly after 10:00 there. When I asked whether 572 # that meant they were on Pacific time, they said no - they were on their 573 # own time. I asked about daylight saving; they said it wasn't used. I 574 # did not inquire about practices in the past. 575 576 # From Arthur David Olson (2011-08-17): 577 # For lack of better information, assume that Metlakatla's 578 # abandonment of use of daylight saving resulted from the 1983 vote. 579 580 # From Steffen Thorsen (2015-11-09): 581 # It seems Metlakatla did go off PST on Sunday, November 1, changing 582 # their time to AKST and are going to follow Alaska's DST, switching 583 # between AKST and AKDT from now on.... 584 # http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 585 586 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 587 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 588 -8:57:41 - LMT 1900 Aug 20 12:00 589 -8:00 - PST 1942 590 -8:00 US P%sT 1946 591 -8:00 - PST 1969 592 -8:00 US P%sT 1980 Apr 27 2:00 593 -9:00 US Y%sT 1980 Oct 26 2:00 594 -8:00 US P%sT 1983 Oct 30 2:00 595 -9:00 US Y%sT 1983 Nov 30 596 -9:00 US AK%sT 597 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 598 -9:01:13 - LMT 1900 Aug 20 12:00 599 -8:00 - PST 1942 600 -8:00 US P%sT 1946 601 -8:00 - PST 1969 602 -8:00 US P%sT 1983 Oct 30 2:00 603 -9:00 US Y%sT 1983 Nov 30 604 -9:00 US AK%sT 605 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 606 -8:46:18 - LMT 1900 Aug 20 12:00 607 -8:00 - PST 1942 608 -8:00 US P%sT 1946 609 -8:00 - PST 1969 610 -8:00 US P%sT 1983 Oct 30 2:00 611 -8:00 - PST 2015 Nov 1 2:00 612 -9:00 US AK%sT 613 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 614 -9:18:55 - LMT 1900 Aug 20 12:00 615 -9:00 - YST 1942 616 -9:00 US Y%sT 1946 617 -9:00 - YST 1969 618 -9:00 US Y%sT 1983 Nov 30 619 -9:00 US AK%sT 620 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 621 -9:59:36 - LMT 1900 Aug 20 12:00 622 -10:00 - AST 1942 623 -10:00 US A%sT 1967 Apr 624 -10:00 - AHST 1969 625 -10:00 US AH%sT 1983 Oct 30 2:00 626 -9:00 US Y%sT 1983 Nov 30 627 -9:00 US AK%sT 628 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 629 -11:01:38 - LMT 1900 Aug 20 12:00 630 -11:00 - NST 1942 631 -11:00 US N%sT 1946 632 -11:00 - NST 1967 Apr 633 -11:00 - BST 1969 634 -11:00 US B%sT 1983 Oct 30 2:00 635 -9:00 US Y%sT 1983 Nov 30 636 -9:00 US AK%sT 637 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 638 -11:46:38 - LMT 1900 Aug 20 12:00 639 -11:00 - NST 1942 640 -11:00 US N%sT 1946 641 -11:00 - NST 1967 Apr 642 -11:00 - BST 1969 643 -11:00 US B%sT 1983 Oct 30 2:00 644 -10:00 US AH%sT 1983 Nov 30 645 -10:00 US H%sT 646 # The following switches don't quite make our 1970 cutoff. 647 # 648 # Shanks writes that part of southwest Alaska (e.g. Aniak) 649 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 650 # and another part (e.g. Akiak) made the same switch five weeks later. 651 # 652 # From David Flater (2004-11-09): 653 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 654 # Historic Preservation Commission, provided this information, which 655 # suggests that Unalaska deviated from statutory time from early 1967 656 # possibly until 1983: 657 # 658 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 659 # "Except for St. Paul and Akutan, Unalaska is the only important 660 # location not on Alaska Standard Time. The following resolution was 661 # made by William Robinson and seconded by Henry Swanson: Be it 662 # resolved that the City of Unalaska hereby goes to Alaska Standard 663 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 664 # January 14, Alaska Standard Time.) This resolution was passed with 665 # three votes for and one against." 666 667 # Hawaii 668 669 # From Arthur David Olson (2010-12-09): 670 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 671 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 672 # the article is available at 673 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 674 # and indicates that standard time was adopted effective noon, January 675 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 676 # saving for the period between the last Sunday of each April and the 677 # last Sunday of each September, but less than a month later repealed the 678 # act," (page 220), that year-round daylight saving time was in effect 679 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 680 # when clocks changed) and that clocks were changed by 30 minutes 681 # effective the second Sunday of June, 1947 (page 219, with no time of 682 # day given for when clocks changed). A footnote for the 1933 changes 683 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 684 # and Act 163 (approved 21 May 1933)." 685 686 # From Arthur David Olson (2011-01-19): 687 # The following is from "Laws of the Territory of Hawaii Passed by the 688 # Seventeenth Legislature: Regular Session 1933," available (as of 689 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 690 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 691 # year, the standard time of this Territory shall be advanced one 692 # hour...This Act shall take effect upon its approval. Approved this 26th 693 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 694 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 695 # hereby repealed...This Act shall take effect upon its approval, upon 696 # which date the standard time of this Territory shall be restored to 697 # that existing immediately prior to the taking effect of said Act 90. 698 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 699 # of the Territory of Hawaii." 700 # 701 # Note that 1933-05-21 was a Sunday. 702 # We're left to guess the time of day when Act 163 was approved; guess noon. 703 704 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 705 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 706 -10:30 - HST 1933 Apr 30 2:00 707 -10:30 1:00 HDT 1933 May 21 12:00 708 -10:30 - HST 1942 Feb 9 2:00 709 -10:30 1:00 HDT 1945 Sep 30 2:00 710 -10:30 - HST 1947 Jun 8 2:00 711 -10:00 - HST 712 713 # Now we turn to US areas that have diverged from the consensus since 1970. 714 715 # Arizona mostly uses MST. 716 717 # From Paul Eggert (2002-10-20): 718 # 719 # The information in the rest of this paragraph is derived from the 720 # Daylight Saving Time web page 721 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 722 # maintained by the Arizona State Library, Archives and Public Records. 723 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 724 # time, but by federal law railroads, airlines, bus lines, military 725 # personnel, and some engaged in interstate commerce continued to 726 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 727 # Gazette says that was the date the law changed, and that 04-01 was 728 # the date the state's clocks would change. In 1945 the State of 729 # Arizona used standard time all year, again with exceptions only as 730 # mandated by federal law. Arizona observed DST in 1967, but Arizona 731 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 732 # 733 # Shanks says the 1944 experiment came to an end on 1944-03-17. 734 # Go with the Arizona State Library instead. 735 736 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 737 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 738 -7:00 US M%sT 1944 Jan 1 0:01 739 -7:00 - MST 1944 Apr 1 0:01 740 -7:00 US M%sT 1944 Oct 1 0:01 741 -7:00 - MST 1967 742 -7:00 US M%sT 1968 Mar 21 743 -7:00 - MST 744 # From Arthur David Olson (1988-02-13): 745 # A writer from the Inter Tribal Council of Arizona, Inc., 746 # notes in private correspondence dated 1987-12-28 that "Presently, only the 747 # Navajo Nation participates in the Daylight Saving Time policy, due to its 748 # large size and location in three states." (The "only" means that other 749 # tribal nations don't use DST.) 750 # 751 # From Paul Eggert (2013-08-26): 752 # See America/Denver for a zone appropriate for the Navajo Nation. 753 754 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 755 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 756 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 757 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 758 # Teton, Twin Falls, Valley, Washington counties, and the southern 759 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 760 # switched four weeks late in 1974. 761 # 762 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 763 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 764 -8:00 US P%sT 1923 May 13 2:00 765 -7:00 US M%sT 1974 766 -7:00 - MST 1974 Feb 3 2:00 767 -7:00 US M%sT 768 769 # Indiana 770 # 771 # For a map of Indiana's time zone regions, see: 772 # http://en.wikipedia.org/wiki/Time_in_Indiana 773 # 774 # From Paul Eggert (2007-08-17): 775 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 776 # with the following exceptions: 777 # 778 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 779 # Vanderburgh, and Warrick counties have been like America/Chicago. 780 # 781 # - Dearborn and Ohio counties have been like America/New_York. 782 # 783 # - Clark, Floyd, and Harrison counties have been like 784 # America/Kentucky/Louisville. 785 # 786 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 787 # and Switzerland counties have their own time zone histories as noted below. 788 # 789 # Shanks partitioned Indiana into 345 regions, each with its own time history, 790 # and wrote "Even newspaper reports present contradictory information." 791 # Those Hoosiers! Such a flighty and changeable people! 792 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 793 # 794 # Other than Indianapolis, the Indiana place names are so nondescript 795 # that they would be ambiguous if we left them at the 'America' level. 796 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 797 798 # From Paul Eggert (2014-06-26): 799 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 800 # says "DOT is relocating the time zone boundary in Indiana to move Starke, 801 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 802 # Eastern Time Zone to the Central Time Zone.... The effective date of 803 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 804 # changeover date from standard time to Daylight Saving Time." 805 # Strictly speaking, this meant the affected counties changed their 806 # clocks twice that night, but this obviously was in error. The intent 807 # was that 01:59:59 EST be followed by 02:00:00 CDT. 808 809 # From Gwillim Law (2007-02-10): 810 # The Associated Press has been reporting that Pulaski County, Indiana is 811 # going to switch from Central to Eastern Time on March 11, 2007.... 812 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 813 814 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 815 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 816 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 817 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 818 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 819 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 820 -6:00 US C%sT 1920 821 -6:00 Indianapolis C%sT 1942 822 -6:00 US C%sT 1946 823 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 824 -5:00 - EST 1957 Sep 29 2:00 825 -6:00 - CST 1958 Apr 27 2:00 826 -5:00 - EST 1969 827 -5:00 US E%sT 1971 828 -5:00 - EST 2006 829 -5:00 US E%sT 830 # 831 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 832 # as well as from 1976 through 2005. 833 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 834 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 835 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 836 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 837 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 838 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 839 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 840 -6:00 US C%sT 1951 841 -6:00 Marengo C%sT 1961 Apr 30 2:00 842 -5:00 - EST 1969 843 -5:00 US E%sT 1974 Jan 6 2:00 844 -6:00 1:00 CDT 1974 Oct 27 2:00 845 -5:00 US E%sT 1976 846 -5:00 - EST 2006 847 -5:00 US E%sT 848 # 849 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 850 # switched from eastern to central time in April 2006, then switched back 851 # in November 2007. 852 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 853 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 854 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 855 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 856 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 857 Rule Vincennes 1955 only - May 1 0:00 1:00 D 858 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 859 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 860 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 861 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 862 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 863 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 864 -6:00 US C%sT 1946 865 -6:00 Vincennes C%sT 1964 Apr 26 2:00 866 -5:00 - EST 1969 867 -5:00 US E%sT 1971 868 -5:00 - EST 2006 Apr 2 2:00 869 -6:00 US C%sT 2007 Nov 4 2:00 870 -5:00 US E%sT 871 # 872 # Perry County, Indiana, switched from eastern to central time in April 2006. 873 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 874 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 875 Rule Perry 1946 only - Sep lastSun 2:00 0 S 876 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 877 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 878 Rule Perry 1955 only - May 1 0:00 1:00 D 879 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 880 Rule Perry 1960 only - Oct lastSun 2:00 0 S 881 Rule Perry 1961 only - Sep lastSun 2:00 0 S 882 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 883 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 884 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 885 -6:00 US C%sT 1946 886 -6:00 Perry C%sT 1964 Apr 26 2:00 887 -5:00 - EST 1969 888 -5:00 US E%sT 1971 889 -5:00 - EST 2006 Apr 2 2:00 890 -6:00 US C%sT 891 # 892 # Pike County, Indiana moved from central to eastern time in 1977, 893 # then switched back in 2006, then switched back again in 2007. 894 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 895 Rule Pike 1955 only - May 1 0:00 1:00 D 896 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 897 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 898 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 899 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 900 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 901 -6:00 US C%sT 1955 902 -6:00 Pike C%sT 1965 Apr 25 2:00 903 -5:00 - EST 1966 Oct 30 2:00 904 -6:00 US C%sT 1977 Oct 30 2:00 905 -5:00 - EST 2006 Apr 2 2:00 906 -6:00 US C%sT 2007 Nov 4 2:00 907 -5:00 US E%sT 908 # 909 # Starke County, Indiana moved from central to eastern time in 1991, 910 # then switched back in 2006. 911 # From Arthur David Olson (1991-10-28): 912 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 913 # notes that Starke County switched from Central time to Eastern time as of 914 # 1991-10-27. 915 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 916 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 917 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 918 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 919 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 920 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 921 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 922 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 923 -6:00 US C%sT 1947 924 -6:00 Starke C%sT 1962 Apr 29 2:00 925 -5:00 - EST 1963 Oct 27 2:00 926 -6:00 US C%sT 1991 Oct 27 2:00 927 -5:00 - EST 2006 Apr 2 2:00 928 -6:00 US C%sT 929 # 930 # Pulaski County, Indiana, switched from eastern to central time in 931 # April 2006 and then switched back in March 2007. 932 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 933 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 934 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 935 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 936 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 937 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 938 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 939 -6:00 US C%sT 1946 940 -6:00 Pulaski C%sT 1961 Apr 30 2:00 941 -5:00 - EST 1969 942 -5:00 US E%sT 1971 943 -5:00 - EST 2006 Apr 2 2:00 944 -6:00 US C%sT 2007 Mar 11 2:00 945 -5:00 US E%sT 946 # 947 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 948 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 949 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 950 -6:00 US C%sT 1954 Apr 25 2:00 951 -5:00 - EST 1969 952 -5:00 US E%sT 1973 953 -5:00 - EST 2006 954 -5:00 US E%sT 955 956 # Part of Kentucky left its clocks alone in 1974. 957 # This also includes Clark, Floyd, and Harrison counties in Indiana. 958 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 959 Rule Louisville 1921 only - May 1 2:00 1:00 D 960 Rule Louisville 1921 only - Sep 1 2:00 0 S 961 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 962 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 963 Rule Louisville 1946 only - Jun 2 2:00 0 S 964 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 965 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 966 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 967 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 968 -6:00 US C%sT 1921 969 -6:00 Louisville C%sT 1942 970 -6:00 US C%sT 1946 971 -6:00 Louisville C%sT 1961 Jul 23 2:00 972 -5:00 - EST 1968 973 -5:00 US E%sT 1974 Jan 6 2:00 974 -6:00 1:00 CDT 1974 Oct 27 2:00 975 -5:00 US E%sT 976 # 977 # Wayne County, Kentucky 978 # 979 # From Lake Cumberland LIFE 980 # http://www.lake-cumberland.com/life/archive/news990129time.shtml 981 # (1999-01-29) via WKYM-101.7: 982 # Clinton County has joined Wayne County in asking the DoT to change from 983 # the Central to the Eastern time zone.... The Wayne County government made 984 # the same request in December. And while Russell County officials have not 985 # taken action, the majority of respondents to a poll conducted there in 986 # August indicated they would like to change to "fast time" also. 987 # The three Lake Cumberland counties are the farthest east of any U.S. 988 # location in the Central time zone. 989 # 990 # From Rich Wales (2000-08-29): 991 # After prolonged debate, and despite continuing deep differences of opinion, 992 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 993 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 994 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 995 # 996 # From Paul Eggert (2001-07-16): 997 # The final rule was published in the 998 # Federal Register 65, 160 (2000-08-17), pp 50154-50158. 999 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 1000 # 1001 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 1002 -6:00 US C%sT 1946 1003 -6:00 - CST 1968 1004 -6:00 US C%sT 2000 Oct 29 2:00 1005 -5:00 US E%sT 1006 1007 1008 # From Rives McDow (2000-08-30): 1009 # Here ... are all the changes in the US since 1985. 1010 # Kearny County, KS (put all of county on central; 1011 # previously split between MST and CST) ... 1990-10 1012 # Starke County, IN (from CST to EST) ... 1991-10 1013 # Oliver County, ND (from MST to CST) ... 1992-10 1014 # West Wendover, NV (from PST TO MST) ... 1999-10 1015 # Wayne County, KY (from CST to EST) ... 2000-10 1016 # 1017 # From Paul Eggert (2001-07-17): 1018 # We don't know where the line used to be within Kearny County, KS, 1019 # so omit that change for now. 1020 # See America/Indiana/Knox for the Starke County, IN change. 1021 # See America/North_Dakota/Center for the Oliver County, ND change. 1022 # West Wendover, NV officially switched from Pacific to mountain time on 1023 # 1999-10-31. See the 1024 # Federal Register 64, 203 (1999-10-21), pp 56705-56707. 1025 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 1026 # However, the Federal Register says that West Wendover already operated 1027 # on mountain time, and the rule merely made this official; 1028 # hence a separate tz entry is not needed. 1029 1030 # Michigan 1031 # 1032 # From Bob Devine (1988-01-28): 1033 # Michigan didn't observe DST from 1968 to 1973. 1034 # 1035 # From Paul Eggert (1999-03-31): 1036 # Shanks writes that Michigan started using standard time on 1885-09-18, 1037 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 1038 # that Detroit kept 1039 # 1040 # local time until 1900 when the City Council decreed that clocks should 1041 # be put back twenty-eight minutes to Central Standard Time. Half the 1042 # city obeyed, half refused. After considerable debate, the decision 1043 # was rescinded and the city reverted to Sun time. A derisive offer to 1044 # erect a sundial in front of the city hall was referred to the 1045 # Committee on Sewers. Then, in 1905, Central time was adopted 1046 # by city vote. 1047 # 1048 # This story is too entertaining to be false, so go with Howse over Shanks. 1049 # 1050 # From Paul Eggert (2001-03-06): 1051 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 1052 # one hour in 1914." This change is not in Shanks. We have no more 1053 # info, so omit this for now. 1054 # 1055 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 1056 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1057 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 1058 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 1059 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 1060 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 1061 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1062 Zone America/Detroit -5:32:11 - LMT 1905 1063 -6:00 - CST 1915 May 15 2:00 1064 -5:00 - EST 1942 1065 -5:00 US E%sT 1946 1066 -5:00 Detroit E%sT 1973 1067 -5:00 US E%sT 1975 1068 -5:00 - EST 1975 Apr 27 2:00 1069 -5:00 US E%sT 1070 # 1071 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1072 # switched from EST to CST/CDT in 1973. 1073 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1074 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1075 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1076 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1077 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1078 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1079 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1080 -6:00 US C%sT 1946 1081 -6:00 Menominee C%sT 1969 Apr 27 2:00 1082 -5:00 - EST 1973 Apr 29 2:00 1083 -6:00 US C%sT 1084 1085 # Navassa 1086 # administered by the US Fish and Wildlife Service 1087 # claimed by US under the provisions of the 1856 Guano Islands Act 1088 # also claimed by Haiti 1089 # occupied 1857/1900 by the Navassa Phosphate Co 1090 # US lighthouse 1917/1996-09 1091 # currently uninhabited 1092 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1093 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1094 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1095 1096 ################################################################################ 1097 1098 1099 # From Paul Eggert (2017-02-10): 1100 # 1101 # Unless otherwise specified, the source for data through 1990 is: 1102 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1103 # San Diego: ACS Publications, Inc. (2003). 1104 # Unfortunately this book contains many errors and cites no sources. 1105 # 1106 # Many years ago Gwillim Law wrote that a good source 1107 # for time zone data was the International Air Transport 1108 # Association's Standard Schedules Information Manual (IATA SSIM), 1109 # published semiannually. Law sent in several helpful summaries 1110 # of the IATA's data after 1990. Except where otherwise noted, 1111 # IATA SSIM is the source for entries after 1990. 1112 # 1113 # Other sources occasionally used include: 1114 # 1115 # Edward W. Whitman, World Time Differences, 1116 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1117 # which I found in the UCLA library. 1118 # 1119 # William Willett, The Waste of Daylight, 19th edition 1120 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1121 # [PDF] (1914-03) 1122 # 1123 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1124 # <http://www.jstor.org/stable/1774359>. 1125 # 1126 # See the 'europe' file for Greenland. 1127 1128 # Canada 1129 1130 # From Alain LaBonté (1994-11-14): 1131 # I post here the time zone abbreviations standardized in Canada 1132 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1133 # 1134 # UTC Standard time Daylight saving time 1135 # offset French English French English 1136 # -2:30 - - HAT NDT 1137 # -3 - - HAA ADT 1138 # -3:30 HNT NST - - 1139 # -4 HNA AST HAE EDT 1140 # -5 HNE EST HAC CDT 1141 # -6 HNC CST HAR MDT 1142 # -7 HNR MST HAP PDT 1143 # -8 HNP PST HAY YDT 1144 # -9 HNY YST - - 1145 # 1146 # HN: Heure Normale ST: Standard Time 1147 # HA: Heure Avancée DT: Daylight saving Time 1148 # 1149 # A: de l'Atlantique Atlantic 1150 # C: du Centre Central 1151 # E: de l'Est Eastern 1152 # M: Mountain 1153 # N: Newfoundland 1154 # P: du Pacifique Pacific 1155 # R: des Rocheuses 1156 # T: de Terre-Neuve 1157 # Y: du Yukon Yukon 1158 # 1159 # From Paul Eggert (1994-11-22): 1160 # Alas, this sort of thing must be handled by localization software. 1161 1162 # Unless otherwise specified, the data entries for Canada are all from Shanks 1163 # & Pottenger. 1164 1165 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1166 # 2007-03-01): 1167 # The British Columbia government announced yesterday that it will 1168 # adjust daylight savings next year to align with changes in the 1169 # U.S. and the rest of Canada.... 1170 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1171 # ... 1172 # Nova Scotia 1173 # Daylight saving time will be extended by four weeks starting in 2007.... 1174 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1175 # 1176 # [For New Brunswick] the new legislation dictates that the time change is to 1177 # be done at 02:00 instead of 00:01. 1178 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1179 # ... 1180 # Manitoba has traditionally changed the clock every fall at 03:00. 1181 # As of 2006, the transition is to take place one hour earlier at 02:00. 1182 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1183 # ... 1184 # [Alberta, Ontario, Quebec] will follow US rules. 1185 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1186 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1187 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1188 # ... 1189 # P.E.I. will follow US rules.... 1190 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1191 # ... 1192 # Province of Newfoundland and Labrador.... 1193 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1194 # ... 1195 # Yukon 1196 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1197 # ... 1198 # N.W.T. will follow US rules. Whoever maintains the government web site 1199 # does not seem to believe in bookmarks. To see the news release, click the 1200 # following link and search for "Daylight Savings Time Change". Press the 1201 # "Daylight Savings Time Change" link; it will fire off a popup using 1202 # JavaScript. 1203 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1204 # ... 1205 # Nunavut 1206 # An amendment to the Interpretation Act was registered on February 19/2007.... 1207 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1208 1209 # From Paul Eggert (2014-10-18): 1210 # H. David Matthews and Mary Vincent's map 1211 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1212 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1213 # contains detailed boundaries for regions observing nonstandard 1214 # time and daylight saving time arrangements in Canada circa 1998. 1215 # 1216 # National Research Council Canada maintains info about time zones and DST. 1217 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1218 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1219 # Its unofficial information is often taken from Matthews and Vincent. 1220 1221 # From Paul Eggert (2006-06-27): 1222 # For now, assume all of DST-observing Canada will fall into line with the 1223 # new US DST rules, 1224 1225 # From Chris Walton (2011-12-01) 1226 # In the first of Tammy Hardwick's articles 1227 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1228 # she quotes the Friday November 1/1918 edition of the Creston Review. 1229 # The quote includes these two statements: 1230 # 'Sunday the CPR went back to the old system of time...' 1231 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1232 # These statements refer to a transition from daylight time to standard time 1233 # that occurred nationally on Sunday October 27/1918. This transition was 1234 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1235 1236 # In light of that evidence, we alter the date from the earlier believed 1237 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1238 # than Thursday) in all Canadian rulesets. 1239 1240 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1241 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1242 Rule Canada 1918 only - Oct 27 2:00 0 S 1243 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1244 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1245 Rule Canada 1945 only - Sep 30 2:00 0 S 1246 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1247 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1248 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1249 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1250 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1251 1252 1253 # Newfoundland and Labrador 1254 1255 # From Paul Eggert (2000-10-02): 1256 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1257 # but the only part of Labrador that follows the rules is the 1258 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1259 # but excluding, say, Black Tickle. 1260 1261 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1262 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1263 Rule StJohns 1917 only - Sep 17 2:00 0 S 1264 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1265 Rule StJohns 1919 only - May 5 23:00 1:00 D 1266 Rule StJohns 1919 only - Aug 12 23:00 0 S 1267 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1268 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1269 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1270 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1271 # Pottenger. 1272 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1273 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1274 # Whitman gives the following transitions: 1275 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1276 # but go with Shanks & Pottenger and assume they used Canadian rules. 1277 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1278 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1279 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1280 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1281 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1282 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1283 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1284 # From Paul Eggert (2000-10-02): 1285 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1286 # at 00:01 local time. For now, assume it started in 1987. 1287 1288 # From Michael Pelley (2011-09-12): 1289 # We received today, Monday, September 12, 2011, notification that the 1290 # changes to the Newfoundland Standard Time Act have been proclaimed. 1291 # The change in the Act stipulates that the change from Daylight Savings 1292 # Time to Standard Time and from Standard Time to Daylight Savings Time 1293 # now occurs at 2:00AM. 1294 # ... 1295 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1296 # ... 1297 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1298 # Office of the Chief Information Officer 1299 # Executive Council 1300 # Government of Newfoundland & Labrador 1301 1302 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1303 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1304 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1305 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1306 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1307 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1308 # 1309 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1310 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1311 Zone America/St_Johns -3:30:52 - LMT 1884 1312 -3:30:52 StJohns N%sT 1918 1313 -3:30:52 Canada N%sT 1919 1314 -3:30:52 StJohns N%sT 1935 Mar 30 1315 -3:30 StJohns N%sT 1942 May 11 1316 -3:30 Canada N%sT 1946 1317 -3:30 StJohns N%sT 2011 Nov 1318 -3:30 Canada N%sT 1319 1320 # most of east Labrador 1321 1322 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1323 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1324 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1325 -3:30:52 - NST 1918 1326 -3:30:52 Canada N%sT 1919 1327 -3:30:52 - NST 1935 Mar 30 1328 -3:30 - NST 1936 1329 -3:30 StJohns N%sT 1942 May 11 1330 -3:30 Canada N%sT 1946 1331 -3:30 StJohns N%sT 1966 Mar 15 2:00 1332 -4:00 StJohns A%sT 2011 Nov 1333 -4:00 Canada A%sT 1334 1335 1336 # west Labrador, Nova Scotia, Prince Edward I 1337 1338 # From Brian Inglis (2015-07-20): 1339 # From the historical weather station records available at: 1340 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1341 # Sydney shares the same time history as Glace Bay, so was 1342 # likely to be the same across the island.... 1343 # Sydney, as the capital and most populous location, or Cape Breton, would 1344 # have been better names for the zone had we known this in 1996. 1345 1346 # From Paul Eggert (2015-07-20): 1347 # Shanks & Pottenger write that since 1970 most of this region has been like 1348 # Halifax. Many locales did not observe peacetime DST until 1972; 1349 # the Cape Breton area, represented by Glace Bay, is the largest we know of 1350 # (Glace Bay was perhaps not the best name choice but no point changing now). 1351 # Shanks & Pottenger also write that Liverpool, NS was the only town 1352 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1353 # this is a typo. 1354 1355 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1356 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1357 Rule Halifax 1916 only - Oct 1 0:00 0 S 1358 Rule Halifax 1920 only - May 9 0:00 1:00 D 1359 Rule Halifax 1920 only - Aug 29 0:00 0 S 1360 Rule Halifax 1921 only - May 6 0:00 1:00 D 1361 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1362 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1363 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1364 Rule Halifax 1923 only - Sep 4 0:00 0 S 1365 Rule Halifax 1924 only - Sep 15 0:00 0 S 1366 Rule Halifax 1925 only - Sep 28 0:00 0 S 1367 Rule Halifax 1926 only - May 16 0:00 1:00 D 1368 Rule Halifax 1926 only - Sep 13 0:00 0 S 1369 Rule Halifax 1927 only - May 1 0:00 1:00 D 1370 Rule Halifax 1927 only - Sep 26 0:00 0 S 1371 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1372 Rule Halifax 1928 only - Sep 9 0:00 0 S 1373 Rule Halifax 1929 only - Sep 3 0:00 0 S 1374 Rule Halifax 1930 only - Sep 15 0:00 0 S 1375 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1376 Rule Halifax 1932 only - May 1 0:00 1:00 D 1377 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1378 Rule Halifax 1933 only - Oct 2 0:00 0 S 1379 Rule Halifax 1934 only - May 20 0:00 1:00 D 1380 Rule Halifax 1934 only - Sep 16 0:00 0 S 1381 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1382 Rule Halifax 1935 only - Sep 30 0:00 0 S 1383 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1384 Rule Halifax 1936 only - Sep 14 0:00 0 S 1385 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1386 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1387 Rule Halifax 1939 only - May 28 0:00 1:00 D 1388 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1389 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1390 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1391 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1392 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1393 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1394 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1395 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1396 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1397 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1398 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1399 -4:00 Halifax A%sT 1918 1400 -4:00 Canada A%sT 1919 1401 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1402 -4:00 Canada A%sT 1946 1403 -4:00 Halifax A%sT 1974 1404 -4:00 Canada A%sT 1405 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1406 -4:00 Canada A%sT 1953 1407 -4:00 Halifax A%sT 1954 1408 -4:00 - AST 1972 1409 -4:00 Halifax A%sT 1974 1410 -4:00 Canada A%sT 1411 1412 # New Brunswick 1413 1414 # From Paul Eggert (2007-01-31): 1415 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1416 # says they changed at 00:01 through 2006, and 1417 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1418 # clear that this was the case since at least 1993. 1419 # For now, assume it started in 1993. 1420 1421 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1422 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1423 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1424 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1425 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1426 Rule Moncton 1939 only - May 27 1:00 1:00 D 1427 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1428 Rule Moncton 1940 only - May 19 1:00 1:00 D 1429 Rule Moncton 1941 only - May 4 1:00 1:00 D 1430 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1431 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1432 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1433 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1434 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1435 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1436 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1437 -5:00 - EST 1902 Jun 15 1438 -4:00 Canada A%sT 1933 1439 -4:00 Moncton A%sT 1942 1440 -4:00 Canada A%sT 1946 1441 -4:00 Moncton A%sT 1973 1442 -4:00 Canada A%sT 1993 1443 -4:00 Moncton A%sT 2007 1444 -4:00 Canada A%sT 1445 1446 # Quebec 1447 1448 # From Paul Eggert (2015-03-24): 1449 # See America/Toronto for most of Quebec, including Montreal. 1450 # 1451 # Matthews and Vincent (1998) also write that Quebec east of the -63 1452 # meridian is supposed to observe AST, but residents as far east as 1453 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1454 # The Quebec department of justice writes in 1455 # "The situation in Minganie and Basse-Côte-Nord" 1456 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1457 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1458 # observes Atlantic standard time all year round. 1459 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1460 # says this common practice was codified into law as of 2007. 1461 # For lack of better info, guess this practice began around 1970, contra to 1462 # Shanks & Pottenger who have this region observing AST/ADT. 1463 1464 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1465 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1466 -4:00 Canada A%sT 1970 1467 -4:00 - AST 1468 1469 # Ontario 1470 1471 # From Paul Eggert (2006-07-09): 1472 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1473 # Toronto. 1474 # Thunder Bay skipped DST in 1973. 1475 # Many smaller locales did not observe peacetime DST until 1974; 1476 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1477 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1478 1479 # From Mark Brader (2003-07-26): 1480 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1481 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1482 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1483 # have already done so. In Orillia DST was to run until Saturday, 1484 # 1912-08-31 (no time mentioned), but it was met with considerable 1485 # hostility from certain segments of the public, and was revoked after 1486 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1487 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1488 # earlier in June). 1489 # 1490 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1491 1492 # From Paul Eggert (1997-10-17): 1493 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1494 # says that Atikokan, Ontario currently does not observe DST, 1495 # but will vote on 11-10 whether to use EST/EDT. 1496 # He also writes that the Ontario Time Act (1990, Chapter T.9) 1497 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1498 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1499 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1500 # concerns a non-official time observed as a matter of local practice. 1501 # 1502 # From Paul Eggert (2000-10-02): 1503 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1504 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1505 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1506 # violation of the official Ontario rules. 1507 # 1508 # From Paul Eggert (2006-07-09): 1509 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1510 # 2005-07-21 Chronicle-Journal, which said: 1511 # 1512 # The clocks in Atikokan stay set on standard time year-round. 1513 # This means they spend about half the time on central time and 1514 # the other half on eastern time. 1515 # 1516 # For the most part, the system works, Mayor Dennis Brown said. 1517 # 1518 # "The majority of businesses in Atikokan deal more with Eastern 1519 # Canada, but there are some that deal with Western Canada," he 1520 # said. "I don't see any changes happening here." 1521 # 1522 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1523 # [New Osnaburgh] follow the same practice." 1524 1525 # From Garry McKinnon (2006-07-14) via Chris Walton: 1526 # I chatted with a member of my board who has an outstanding memory 1527 # and a long history in Atikokan (and in the telecom industry) and he 1528 # can say for certain that Atikokan has been practicing the current 1529 # time keeping since 1952, at least. 1530 1531 # From Paul Eggert (2006-07-17): 1532 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1533 # ever since standard time was introduced, but the information from 1534 # McKinnon sounds more authoritative. For now, assume that Atikokan 1535 # switched to EST immediately after WWII era daylight saving time 1536 # ended. This matches the old (less-populous) America/Coral_Harbour 1537 # entry since our cutoff date of 1970, so we can move 1538 # America/Coral_Harbour to the 'backward' file. 1539 1540 # From Mark Brader (2010-03-06): 1541 # 1542 # Currently the database has: 1543 # 1544 # # Ontario 1545 # 1546 # # From Paul Eggert (2006-07-09): 1547 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1548 # # Toronto. 1549 # # Thunder Bay skipped DST in 1973. 1550 # # Many smaller locales did not observe peacetime DST until 1974; 1551 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1552 # 1553 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1554 # right corner of page 1, it says that Toronto will return to standard 1555 # time at 2 am Sunday morning (which agrees with the database), and that: 1556 # 1557 # The one-hour setback will go into effect throughout most of Ontario, 1558 # except in areas like Windsor which remains on standard time all year. 1559 # 1560 # Windsor is, of course, a lot larger than Nipigon. 1561 # 1562 # I only came across this incidentally. I don't know if Windsor began 1563 # observing DST when Detroit did, or in 1974, or on some other date. 1564 # 1565 # By the way, the article continues by noting that: 1566 # 1567 # Some cities in the United States have pushed the deadline back 1568 # three weeks and will change over from daylight saving in October. 1569 1570 # From Arthur David Olson (2010-07-17): 1571 # 1572 # "Standard Time and Time Zones in Canada" appeared in 1573 # The Journal of The Royal Astronomical Society of Canada, 1574 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1575 # was available at 1576 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1577 # 1578 # It includes the text below (starting on page 57): 1579 # 1580 # A list of the places in Canada using daylight saving time would 1581 # require yearly revision. From information kindly furnished by 1582 # the provincial governments and by the postmasters in many cities 1583 # and towns, it is found that the following places used daylight sav- 1584 # ing in 1930. The information for the province of Quebec is definite, 1585 # for the other provinces only approximate: 1586 # 1587 # Province Daylight saving time used 1588 # Prince Edward Island Not used. 1589 # Nova Scotia In Halifax only. 1590 # New Brunswick In St. John only. 1591 # Quebec In the following places: 1592 # Montreal Lachine 1593 # Quebec Mont-Royal 1594 # Lévis Iberville 1595 # St. Lambert Cap de la Madelèine 1596 # Verdun Loretteville 1597 # Westmount Richmond 1598 # Outremont St. Jérôme 1599 # Longueuil Greenfield Park 1600 # Arvida Waterloo 1601 # Chambly-Canton Beaulieu 1602 # Melbourne La Tuque 1603 # St. Théophile Buckingham 1604 # Ontario Used generally in the cities and towns along 1605 # the southerly part of the province. Not 1606 # used in the northwesterly part. 1607 # Manitoba Not used. 1608 # Saskatchewan In Regina only. 1609 # Alberta Not used. 1610 # British Columbia Not used. 1611 # 1612 # With some exceptions, the use of daylight saving may be said to be limited 1613 # to those cities and towns lying between Quebec city and Windsor, Ont. 1614 1615 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1616 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1617 Rule Toronto 1919 only - Oct 26 0:00 0 S 1618 Rule Toronto 1920 only - May 2 2:00 1:00 D 1619 Rule Toronto 1920 only - Sep 26 0:00 0 S 1620 Rule Toronto 1921 only - May 15 2:00 1:00 D 1621 Rule Toronto 1921 only - Sep 15 2:00 0 S 1622 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1623 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1624 # was meant. 1625 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1626 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1627 # The 1927-to-1939 rules can be expressed more simply as 1628 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1629 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1630 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1631 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1632 # The rules below avoid use of Sun>=25 1633 # (which pre-2004 versions of zic cannot handle). 1634 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1635 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1636 Rule Toronto 1932 only - May 1 2:00 1:00 D 1637 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1638 Rule Toronto 1933 only - Oct 1 2:00 0 S 1639 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1640 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1641 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1642 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1643 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1644 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1645 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1646 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1647 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1648 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1649 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1650 # is wrong, and that he had confirmed it by checking the 1971-10-30 1651 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1652 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1653 1654 # From Paul Eggert (2003-07-27): 1655 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1656 # Port Arthur, Ontario, the principle of the Bill has been in 1657 # operation for the past three years, and in the City of Moose Jaw, 1658 # Saskatchewan, for one year." 1659 1660 # From David Bryan via Tory Tronrud, Director/Curator, 1661 # Thunder Bay Museum (2003-11-12): 1662 # There is some suggestion, however, that, by-law or not, daylight 1663 # savings time was being practiced in Fort William and Port Arthur 1664 # before 1909.... [I]n 1910, the line between the Eastern and Central 1665 # Time Zones was permanently moved about two hundred miles west to 1666 # include the Thunder Bay area.... When Canada adopted daylight 1667 # savings time in 1916, Fort William and Port Arthur, having done so 1668 # already, did not change their clocks.... During the Second World 1669 # War,... [t]he cities agreed to implement DST during the summer 1670 # months for the remainder of the war years. 1671 1672 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1673 Zone America/Toronto -5:17:32 - LMT 1895 1674 -5:00 Canada E%sT 1919 1675 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1676 -5:00 Canada E%sT 1946 1677 -5:00 Toronto E%sT 1974 1678 -5:00 Canada E%sT 1679 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1680 -6:00 - CST 1910 1681 -5:00 - EST 1942 1682 -5:00 Canada E%sT 1970 1683 -5:00 Toronto E%sT 1973 1684 -5:00 - EST 1974 1685 -5:00 Canada E%sT 1686 Zone America/Nipigon -5:53:04 - LMT 1895 1687 -5:00 Canada E%sT 1940 Sep 29 1688 -5:00 1:00 EDT 1942 Feb 9 2:00s 1689 -5:00 Canada E%sT 1690 Zone America/Rainy_River -6:18:16 - LMT 1895 1691 -6:00 Canada C%sT 1940 Sep 29 1692 -6:00 1:00 CDT 1942 Feb 9 2:00s 1693 -6:00 Canada C%sT 1694 Zone America/Atikokan -6:06:28 - LMT 1895 1695 -6:00 Canada C%sT 1940 Sep 29 1696 -6:00 1:00 CDT 1942 Feb 9 2:00s 1697 -6:00 Canada C%sT 1945 Sep 30 2:00 1698 -5:00 - EST 1699 1700 1701 # Manitoba 1702 1703 # From Rob Douglas (2006-04-06): 1704 # the old Manitoba Time Act - as amended by Bill 2, assented to 1705 # March 27, 1987 ... said ... 1706 # "between two o'clock Central Standard Time in the morning of 1707 # the first Sunday of April of each year and two o'clock Central 1708 # Standard Time in the morning of the last Sunday of October next 1709 # following, one hour in advance of Central Standard Time."... 1710 # I believe that the English legislation [of the old time act] had 1711 # been assented to (March 22, 1967).... 1712 # Also, as far as I can tell, there was no order-in-council varying 1713 # the time of Daylight Saving Time for 2005 and so the provisions of 1714 # the 1987 version would apply - the changeover was at 2:00 Central 1715 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1716 1717 # From Paul Eggert (2006-04-10): 1718 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1719 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1720 # it was also 02:00s in 1966. 1721 1722 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1723 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1724 Rule Winn 1916 only - Sep 17 0:00 0 S 1725 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1726 Rule Winn 1918 only - Oct 27 2:00 0 S 1727 Rule Winn 1937 only - May 16 2:00 1:00 D 1728 Rule Winn 1937 only - Sep 26 2:00 0 S 1729 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1730 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1731 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1732 Rule Winn 1946 only - May 12 2:00 1:00 D 1733 Rule Winn 1946 only - Oct 13 2:00 0 S 1734 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1735 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1736 Rule Winn 1950 only - May 1 2:00 1:00 D 1737 Rule Winn 1950 only - Sep 30 2:00 0 S 1738 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1739 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1740 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1741 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1742 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1743 Rule Winn 1963 only - Sep 22 2:00 0 S 1744 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1745 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1746 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1747 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1748 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1749 -6:00 Winn C%sT 2006 1750 -6:00 Canada C%sT 1751 1752 1753 # Saskatchewan 1754 1755 # From Mark Brader (2003-07-26): 1756 # The first actual adoption of DST in Canada was at the municipal 1757 # level. As the [Toronto] Star put it (1912-06-07), "While people 1758 # elsewhere have long been talking of legislation to save daylight, 1759 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1760 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1761 # presumably late evening, as below), and would run until "the end of 1762 # the summer". The discrepancy between municipal time and railroad 1763 # time was noted. 1764 1765 # From Paul Eggert (2003-07-27): 1766 # Willett (1914-03) notes that DST "has been in operation ... in the 1767 # City of Moose Jaw, Saskatchewan, for one year." 1768 1769 # From Paul Eggert (2006-03-22): 1770 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1771 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1772 # Other western towns (e.g. Lloydminster) are like Edmonton. 1773 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1774 # are like Winnipeg, in violation of Saskatchewan law. 1775 1776 # From W. Jones (1992-11-06): 1777 # The. . .below is based on information I got from our law library, the 1778 # provincial archives, and the provincial Community Services department. 1779 # A precise history would require digging through newspaper archives, and 1780 # since you didn't say what you wanted, I didn't bother. 1781 # 1782 # Saskatchewan is split by a time zone meridian (105W) and over the years 1783 # the boundary became pretty ragged as communities near it reevaluated 1784 # their affiliations in one direction or the other. In 1965 a provincial 1785 # referendum favoured legislating common time practices. 1786 # 1787 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1788 # Saskatchewan 1978) was proclaimed, and established that the eastern 1789 # part of Saskatchewan would use CST year round, that districts in 1790 # northwest Saskatchewan would by default follow CST but could opt to 1791 # follow Mountain Time rules (thus 1 hour difference in the winter and 1792 # zero in the summer), and that districts in southwest Saskatchewan would 1793 # by default follow MT but could opt to follow CST. 1794 # 1795 # It took a few years for the dust to settle (I know one story of a town 1796 # on one time zone having its school in another, such that a mom had to 1797 # serve her family lunch in two shifts), but presently it seems that only 1798 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1799 # rules any more; all other districts appear to have used CST year round 1800 # since sometime in the 1960s. 1801 1802 # From Chris Walton (2006-06-26): 1803 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1804 # long and rather painful to read. 1805 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1806 1807 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1808 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1809 Rule Regina 1918 only - Oct 27 2:00 0 S 1810 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1811 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1812 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1813 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1814 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1815 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1816 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1817 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1818 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1819 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1820 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1821 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1822 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1823 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1824 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1825 # 1826 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1827 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1828 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1829 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1830 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1831 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1832 Zone America/Regina -6:58:36 - LMT 1905 Sep 1833 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1834 -6:00 - CST 1835 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1836 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1837 -7:00 Regina M%sT 1950 1838 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1839 -6:00 - CST 1840 1841 1842 # Alberta 1843 1844 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1845 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1846 Rule Edm 1918 only - Oct 27 2:00 0 S 1847 Rule Edm 1919 only - May 27 2:00 0 S 1848 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1849 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1850 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1851 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1852 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1853 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1854 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1855 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1856 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1857 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1858 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1859 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1860 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1861 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1862 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1863 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1864 -7:00 Edm M%sT 1987 1865 -7:00 Canada M%sT 1866 1867 1868 # British Columbia 1869 1870 # From Paul Eggert (2006-03-22): 1871 # Shanks & Pottenger write that since 1970 most of this region has 1872 # been like Vancouver. 1873 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1874 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1875 1876 # It seems though that (re: Creston) is not entirely correct: 1877 1878 # From Chris Walton (2011-12-01): 1879 # There are two areas within the Canadian province of British Columbia 1880 # that do not currently observe daylight saving: 1881 # a) The Creston Valley (includes the town of Creston and surrounding area) 1882 # b) The eastern half of the Peace River Regional District 1883 # (includes the cities of Dawson Creek and Fort St. John) 1884 1885 # Earlier this year I stumbled across a detailed article about the time 1886 # keeping history of Creston; it was written by Tammy Hardwick who is the 1887 # manager of the Creston & District Museum. The article was written in May 2009. 1888 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1889 # According to the article, Creston has not changed its clocks since June 1918. 1890 # i.e. Creston has been stuck on UTC-7 for 93 years. 1891 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1892 1893 # Unfortunately the exact date for the time change in June 1918 remains 1894 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1895 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1896 # as plausible as any other date (in June). She also said that after writing 1897 # the article she had discovered another time change in 1916; this is the 1898 # subject of another article which she wrote in October 2010. 1899 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1900 1901 # Here is a summary of the three clock change events in Creston's history: 1902 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1903 # Exact date unknown 1904 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1905 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1906 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1907 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1908 # note 1: 1909 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1910 # Creston did not change its clocks. 1911 # note 2: 1912 # During WWII when the Federal Government legislated a mandatory clock change, 1913 # Creston did not oblige. 1914 # note 3: 1915 # There is no guarantee that Creston will remain on Mountain Standard Time 1916 # (UTC-7) forever. 1917 # The subject was debated at least once this year by the town Council. 1918 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1919 1920 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1921 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1922 # summer time to cause the offset to be -7:00, the same as it had been before 1923 # the change. It can be argued that the timezone abbreviation during this 1924 # period should be PDT rather than MST, but that doesn't seem important enough 1925 # (to anyone) to further complicate the rules. 1926 1927 # The transition dates (and times) are guesses. 1928 1929 # From Matt Johnson (2015-09-21): 1930 # Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1931 # were aligned with America/Vancouver, they're now aligned with 1932 # America/Dawson_Creek. 1933 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1934 # 1935 # From Tim Parenti (2015-09-23): 1936 # This requires a new zone for the Northern Rockies Regional Municipality, 1937 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1938 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1939 # been on MST (-0700) like Dawson Creek since it advanced its clocks on 1940 # 2015-03-08. 1941 # 1942 # From Paul Eggert (2015-09-23): 1943 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1944 1945 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1946 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1947 Rule Vanc 1918 only - Oct 27 2:00 0 S 1948 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1949 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1950 Rule Vanc 1945 only - Sep 30 2:00 0 S 1951 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1952 Rule Vanc 1946 only - Oct 13 2:00 0 S 1953 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1954 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1955 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1956 Zone America/Vancouver -8:12:28 - LMT 1884 1957 -8:00 Vanc P%sT 1987 1958 -8:00 Canada P%sT 1959 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1960 -8:00 Canada P%sT 1947 1961 -8:00 Vanc P%sT 1972 Aug 30 2:00 1962 -7:00 - MST 1963 Zone America/Fort_Nelson -8:10:47 - LMT 1884 1964 -8:00 Vanc P%sT 1946 1965 -8:00 - PST 1947 1966 -8:00 Vanc P%sT 1987 1967 -8:00 Canada P%sT 2015 Mar 8 2:00 1968 -7:00 - MST 1969 Zone America/Creston -7:46:04 - LMT 1884 1970 -7:00 - MST 1916 Oct 1 1971 -8:00 - PST 1918 Jun 2 1972 -7:00 - MST 1973 1974 # Northwest Territories, Nunavut, Yukon 1975 1976 # From Paul Eggert (2006-03-22): 1977 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1978 # Mathew Englander (1996-10-07) gives the following refs: 1979 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1980 # c. 7 defines Yukon standard time as UTC-9.... 1981 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1982 # [http://canlii.ca/t/7vhg] 1983 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1984 # * O.I.C. 1980/02 established DST. 1985 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1986 1987 # From Brian Inglis (2015-04-14): 1988 # 1989 # I tried to trace the history of Yukon time and found the following 1990 # regulations, giving the reference title and URL if found, regulation name, 1991 # and relevant quote if available. Each regulation specifically revokes its 1992 # predecessor. The final reference is to the current Interpretation Act 1993 # authorizing and resulting from these regulatory changes. 1994 # 1995 # Only recent regulations were retrievable via Yukon government site search or 1996 # index, and only some via Canadian legal sources. Other sources used include 1997 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1998 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1999 # 1970 quoted below; each article includes current extracts from provincial 2000 # and territorial ST and DST regulations at the end, summaries and details of 2001 # standard times and daylight saving time at many locations across Canada, 2002 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 2003 # and LMST; they also cover many countries and global locations, with a chart 2004 # and table showing current Universal Time offsets, and may be useful as 2005 # another source of information for 1970 and earlier. 2006 # 2007 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 2008 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 2009 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 2010 # Yukon Interpretation Ordinance 2011 # Yukon standard time is the local mean time at the one hundred and 2012 # thirty-fifth meridian. 2013 # 2014 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 2015 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 2016 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 2017 # Yukon Interpretation Ordinance, 1955, Chap. 16. 2018 # 2019 # (1) Subject to this section, standard time shall be reckoned as nine 2020 # hours behind Greenwich Time and called Yukon Standard Time. 2021 # 2022 # (2) Notwithstanding subsection (1), the Commissioner may make regulations 2023 # varying the manner of reckoning standard time. 2024 # 2025 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 2026 # http://? - no online source found 2027 # 2028 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2029 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2030 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2031 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2032 # 2033 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2034 # Territory on 27th January, 1966, is hereby revoked. 2035 # 2036 # 2. Yukon (East) Standard Time as defined by section 36 of the 2037 # Interpretation Ordinance from and after mid-night on the 28th day of May, 2038 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2039 # is to say, eight hours behind Greenwich Time in the area of the Yukon 2040 # Territory lying east of the 138th degree longitude west. 2041 # 2042 # 3. In the remainder of the Territory, lying west of the 138th degree 2043 # longitude west, Yukon (West) Standard Time shall be reckoned as nine 2044 # hours behind Greenwich Time. 2045 # 2046 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2047 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2048 # C.O. 1973/214 INTERPRETATION ACT ... 2049 # 2050 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2051 # revoked. 2052 # 2053 # 2. Yukon Standard Time as defined by section 36 of the Interpretation 2054 # Act from and after midnight on the twenty-eighth day of October, 1973 2055 # shall be reckoned in the same manner as Pacific Standard Time, that is 2056 # to say eight hours behind Greenwich Time. 2057 # 2058 # * O.I.C. 1980/02 INTERPRETATION ACT 2059 # http://? - no online source found 2060 # 2061 # * Yukon Daylight Saving Time, YOIC 1987/56 2062 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2063 # O.I.C. 1987/056 INTERPRETATION ACT ... 2064 # 2065 # In every year between 2066 # (a) two o'clock in the morning in the first Sunday in April, and 2067 # (b) two o'clock in the morning in the last Sunday in October, 2068 # Standard Time shall be reckoned as seven hours behind Greenwich Time and 2069 # called Yukon Daylight Saving Time. 2070 # ... 2071 # Dated ... 9th day of March, A.D., 1987. 2072 # 2073 # * Yukon Daylight Saving Time 2006, YOIC 2006/127 2074 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2075 # O.I.C. 2006/127 INTERPRETATION ACT ... 2076 # 2077 # 1. In Yukon each year the time for general purposes shall be 7 hours 2078 # behind Greenwich mean time during the period commencing at two o'clock 2079 # in the forenoon on the second Sunday of March and ending at two o'clock 2080 # in the forenoon on the first Sunday of November and shall be called 2081 # Yukon Daylight Saving Time. 2082 # 2083 # 2. Order-in-Council 1987/56 is revoked. 2084 # 2085 # 3. This order comes into force January 1, 2007. 2086 # 2087 # * Interpretation Act, RSY 2002, c 125 2088 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2089 2090 # From Rives McDow (1999-09-04): 2091 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 2092 # Nunavut moves to single time zone Oct. 31 2093 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html 2094 # 2095 # From Antoine Leca (1999-09-06): 2096 # We then need to create a new timezone for the Kitikmeot region of Nunavut 2097 # to differentiate it from the Yellowknife region. 2098 2099 # From Paul Eggert (1999-09-20): 2100 # Basic Facts: The New Territory 2101 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2102 # (1999) reports that Pangnirtung operates on eastern time, 2103 # and that Coral Harbour does not observe DST. We don't know when 2104 # Pangnirtung switched to eastern time; we'll guess 1995. 2105 2106 # From Rives McDow (1999-11-08): 2107 # On October 31, when the rest of Nunavut went to Central time, 2108 # Pangnirtung wobbled. Here is the result of their wobble: 2109 # 2110 # The following businesses and organizations in Pangnirtung use Central Time: 2111 # 2112 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2113 # Eastern Arctic National Parks, A & D Specialist 2114 # 2115 # The following businesses and organizations in Pangnirtung use Eastern Time: 2116 # 2117 # Hamlet office, All other businesses, Both schools, Airport operator 2118 # 2119 # This has made for an interesting situation there, which warranted the news. 2120 # No one there that I spoke with seems concerned, or has plans to 2121 # change the local methods of keeping time, as it evidently does not 2122 # really interfere with any activities or make things difficult locally. 2123 # They plan to celebrate New Year's turn-over twice, one hour apart, 2124 # so it appears that the situation will last at least that long. 2125 # The Nunavut Intergovernmental Affairs hopes that they will "come to 2126 # their senses", but the locals evidently don't see any problem with 2127 # the current state of affairs. 2128 2129 # From Michaela Rodrigue, writing in the 2130 # Nunatsiaq News (1999-11-19): 2131 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2132 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2133 # central - or Nunavut time - for government offices, and eastern time 2134 # for municipal offices and schools.... Igloolik [was similar but then] 2135 # made the switch to central time on Saturday, Nov. 6. 2136 2137 # From Paul Eggert (2000-10-02): 2138 # Matthews and Vincent (1998) say the following, but we lack histories 2139 # for these potential new Zones. 2140 # 2141 # The Canadian Forces station at Alert uses Eastern Time while the 2142 # handful of residents at the Eureka weather station [in the Central 2143 # zone] skip daylight savings. Baffin Island, which is crossed by the 2144 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 2145 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2146 # Central Time and Southampton Island [in the Central zone] is not 2147 # required to use daylight savings. 2148 2149 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2150 # Nunavut now has two time zones (2000-11-10): 2151 # The Nunavut government would allow its employees in Kugluktuk and 2152 # Cambridge Bay to operate on central time year-round, putting them 2153 # one hour behind the rest of Nunavut for six months during the winter. 2154 # At the end of October the two communities had rebelled against 2155 # Nunavut's unified time zone, refusing to shift to eastern time with 2156 # the rest of the territory for the winter. Cambridge Bay remained on 2157 # central time, while Kugluktuk, even farther west, reverted to 2158 # mountain time, which they had used before the advent of Nunavut's 2159 # unified time zone in 1999. 2160 # 2161 # From Rives McDow (2001-01-20), quoting the Nunavut government: 2162 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2163 2164 # From Paul Eggert (2000-12-04): 2165 # Let's just keep track of the official times for now. 2166 2167 # From Rives McDow (2001-03-07): 2168 # The premier of Nunavut has issued a ministerial statement advising 2169 # that effective 2001-04-01, the territory of Nunavut will revert 2170 # back to three time zones (mountain, central, and eastern). Of the 2171 # cities in Nunavut, Coral Harbor is the only one that I know of that 2172 # has said it will not observe dst, staying on EST year round. I'm 2173 # checking for more info, and will get back to you if I come up with 2174 # more. 2175 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2176 2177 # From Gwillim Law (2005-05-21): 2178 # According to ... 2179 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2180 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2181 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2182 # round. Using Google, it's easy to find other websites that confirm this. 2183 # I wasn't able to find how far back this time regimen goes, but since it 2184 # predates the creation of Nunavut, it probably goes back many years.... 2185 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2186 # 2187 # From Paul Eggert (2014-10-17): 2188 # For lack of better information, assume that Southampton Island observed 2189 # daylight saving only during wartime. Gwillim Law's email also 2190 # mentioned maps now maintained by National Research Council Canada; 2191 # see above for an up-to-date link. 2192 2193 # From Chris Walton (2007-03-01): 2194 # ... the community of Resolute (located on Cornwallis Island in 2195 # Nunavut) moved from Central Time to Eastern Time last November. 2196 # Basically the community did not change its clocks at the end of 2197 # daylight saving.... 2198 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2199 2200 # From Chris Walton (2011-03-21): 2201 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2202 # Bay. Resolute Bay is a small community located about 900km north of 2203 # the Arctic Circle. The zone file was required because Resolute Bay had 2204 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2205 # 2206 # According to new information which I received last week, Resolute Bay 2207 # went back to using UTC-6 in the winter of 2007-2008... 2208 # 2209 # On March 11/2007 most of Canada went onto daylight saving. On March 2210 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2211 # talked to somebody that was both knowledgeable and helpful. I was able 2212 # to confirm that Resolute Bay was still operating on UTC-5. It was 2213 # explained to me that Resolute Bay had been on the Eastern Time zone 2214 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2215 # i.e. the time zone had changed twice in the last year but the clocks 2216 # had not moved. The residents had to know which time zone they were in 2217 # so they could follow the correct TV schedule... 2218 # 2219 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2220 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2221 # of the phone call, I decided to seek out an alternate source of 2222 # information. I found an e-mail address for somebody by the name of 2223 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2224 # Arctic Co-operatives." I was under the impression that Stephanie lived 2225 # and worked in Resolute Bay... 2226 # 2227 # On March 14/2011 I phoned the hamlet office again. I was told that 2228 # Resolute Bay had been using Central Standard Time over the winter of 2229 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2230 # on March 13/2011. The person I talked to was aware that Resolute Bay 2231 # had previously experimented with Eastern Standard Time but he could not 2232 # tell me when the practice had stopped. 2233 # 2234 # On March 17/2011 I searched the Web to find an e-mail address of 2235 # somebody that might be able to tell me exactly when Resolute Bay went 2236 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2237 # used to be the mayor of Resolute Bay and he apparently owns half the 2238 # businesses including "South Camp Inn." This website has some info on 2239 # Aziz: 2240 # http://www.uphere.ca/node/493 2241 # 2242 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2243 # Eastern Standard Time. 2244 # 2245 # Aziz responded quickly with this: "hi, The time was not changed for the 2246 # 1 year only, the following year, the community went back to the old way 2247 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2248 # the winter Zulu plus 6 hrs" 2249 # 2250 # This of course conflicted with everything I had ascertained in November 2008. 2251 # 2252 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2253 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2254 # may want to check with the weather office in Resolute Bay or do a 2255 # search on the weather through Env. Canada. web site" 2256 # 2257 # If I had realized the Stephanie did not live in Resolute Bay I would 2258 # never have contacted her. I now believe that all the information I 2259 # obtained in November 2008 should be ignored... 2260 # I apologize for reporting incorrect information in 2008. 2261 2262 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2263 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2264 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2265 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2266 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2267 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2268 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2269 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2270 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2271 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2272 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2273 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2274 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2275 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2276 # aka Panniqtuuq 2277 Zone America/Pangnirtung 0 - -00 1921 # trading post est. 2278 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2279 -5:00 Canada E%sT 1999 Oct 31 2:00 2280 -6:00 Canada C%sT 2000 Oct 29 2:00 2281 -5:00 Canada E%sT 2282 # formerly Frobisher Bay 2283 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2284 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2285 -6:00 Canada C%sT 2000 Oct 29 2:00 2286 -5:00 Canada E%sT 2287 # aka Qausuittuq 2288 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2289 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2290 -5:00 - EST 2001 Apr 1 3:00 2291 -6:00 Canada C%sT 2006 Oct 29 2:00 2292 -5:00 - EST 2007 Mar 11 3:00 2293 -6:00 Canada C%sT 2294 # aka Kangiqiniq 2295 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2296 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2297 -5:00 - EST 2001 Apr 1 3:00 2298 -6:00 Canada C%sT 2299 # aka Iqaluktuuttiaq 2300 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2301 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2302 -6:00 Canada C%sT 2000 Oct 29 2:00 2303 -5:00 - EST 2000 Nov 5 0:00 2304 -6:00 - CST 2001 Apr 1 3:00 2305 -7:00 Canada M%sT 2306 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2307 -7:00 NT_YK M%sT 1980 2308 -7:00 Canada M%sT 2309 Zone America/Inuvik 0 - -00 1953 # Inuvik founded 2310 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2311 -7:00 NT_YK M%sT 1980 2312 -7:00 Canada M%sT 2313 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2314 -9:00 NT_YK Y%sT 1967 May 28 0:00 2315 -8:00 NT_YK P%sT 1980 2316 -8:00 Canada P%sT 2317 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2318 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2319 -8:00 NT_YK P%sT 1980 2320 -8:00 Canada P%sT 2321 2322 2323 ############################################################################### 2324 2325 # Mexico 2326 2327 # From Paul Eggert (2014-12-07): 2328 # The Investigation and Analysis Service of the 2329 # Mexican Library of Congress (MLoC) has published a 2330 # history of Mexican local time (in Spanish) 2331 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2332 # 2333 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2334 # (In all cases we go with the MLoC.) 2335 # S&P report that Baja was at -8:00 in 1922/1923. 2336 # S&P say the 1930 transition in Baja was 1930-11-16. 2337 # S&P report no DST during summer 1931. 2338 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2339 2340 # From Gwillim Law (2001-02-20): 2341 # There are some other discrepancies between the Decrees page and the 2342 # tz database. I think they can best be explained by supposing that 2343 # the researchers who prepared the Decrees page failed to find some of 2344 # the relevant documents. 2345 2346 # From Alan Perry (1996-02-15): 2347 # A guy from our Mexico subsidiary finally found the Presidential Decree 2348 # outlining the timezone changes in Mexico. 2349 # 2350 # ------------- Begin Forwarded Message ------------- 2351 # 2352 # I finally got my hands on the Official Presidential Decree that sets up the 2353 # rules for the DST changes. The rules are: 2354 # 2355 # 1. The country is divided in 3 timezones: 2356 # - Baja California Norte (the Mexico/BajaNorte TZ) 2357 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2358 # - The rest of the country (the Mexico/General TZ) 2359 # 2360 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2361 # at 2:00 AM, the times in each zone are as follows: 2362 # BajaNorte: GMT+7 2363 # BajaSur: GMT+6 2364 # General: GMT+5 2365 # 2366 # 3. The rest of the year, the times are as follows: 2367 # BajaNorte: GMT+8 2368 # BajaSur: GMT+7 2369 # General: GMT+6 2370 # 2371 # The Decree was published in Mexico's Official Newspaper on January 4th. 2372 # 2373 # -------------- End Forwarded Message -------------- 2374 # From Paul Eggert (1996-06-12): 2375 # For an English translation of the decree, see 2376 # "Diario Oficial: Time Zone Changeover" (1996-01-04). 2377 # http://mexico-travel.com/extra/timezone_eng.html 2378 2379 # From Rives McDow (1998-10-08): 2380 # The State of Quintana Roo has reverted back to central STD and DST times 2381 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2382 2383 # From Rives McDow (2000-01-10): 2384 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2385 # zone 5 hours from the International Date Line, and will not observe daylight 2386 # savings time so as to stay on the same time zone as the southern part of 2387 # Arizona year round. 2388 2389 # From Jesper Nørgaard, translating 2390 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2391 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2392 # Syndicate of Education Workers, refuse to apply daylight saving each 2393 # year, so that the more than 10,000 schools work at normal hour the 2394 # whole year. 2395 2396 # From Gwillim Law (2001-01-19): 2397 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2398 # (translated):... 2399 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2400 # that Summer Time will be reduced from seven to five months, starting 2401 # this year.... 2402 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2403 # [translated], says "summer time will ... take effect on the first Sunday 2404 # in May, and end on the last Sunday of September. 2405 2406 # From Arthur David Olson (2001-01-25): 2407 # The 2001-01-24 traditional Washington Post contained the page one 2408 # story "Timely Issue Divides Mexicans."... 2409 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2410 # ... Mexico City Mayor López Obrador "...is threatening to keep 2411 # Mexico City and its 20 million residents on a different time than 2412 # the rest of the country..." In particular, López Obrador would abolish 2413 # observation of Daylight Saving Time. 2414 2415 # Official statute published by the Energy Department 2416 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2417 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2418 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2419 2420 # From Paul Eggert (2001-03-03): 2421 # 2422 # http://www.latimes.com/news/nation/20010303/t000018766.html 2423 # James F. Smith writes in today's LA Times 2424 # * Sonora will continue to observe standard time. 2425 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2426 # the Federal District will not adopt DST. 2427 # * 4 of 16 district leaders announced they'll ignore the decree. 2428 # * The decree does not affect federal-controlled facilities including 2429 # the airport, banks, hospitals, and schools. 2430 # 2431 # For now we'll assume that the Federal District will bow to federal rules. 2432 2433 # From Jesper Nørgaard (2001-04-01): 2434 # I found some references to the Mexican application of daylight 2435 # saving, which modifies what I had already sent you, stating earlier 2436 # that a number of northern Mexican states would go on daylight 2437 # saving. The modification reverts this to only cover Baja California 2438 # (Norte), while all other states (except Sonora, who has no daylight 2439 # saving all year) will follow the original decree of president 2440 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2441 # September 30, 2001. 2442 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2443 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2444 2445 # From Reuters (2001-09-04): 2446 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2447 # unconstitutional in Mexico City, creating the possibility the 2448 # capital will be in a different time zone from the rest of the nation 2449 # next year.... The Supreme Court's ruling takes effect at 2:00 2450 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2451 # standard time. "This is so residents of the Federal District are not 2452 # subject to unexpected time changes," a statement from the court said. 2453 2454 # From Jesper Nørgaard Welen (2002-03-12): 2455 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2456 # that a new decision had been made to reinstate US style DST in Mexico.... 2457 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2458 # confirms this. Sonora as usual is the only state where DST is not applied. 2459 2460 # From Steffen Thorsen (2009-12-28): 2461 # 2462 # Steffen Thorsen wrote: 2463 # > Mexico's House of Representatives has approved a proposal for northern 2464 # > Mexico's border cities to share the same daylight saving schedule as 2465 # > the United States. 2466 # Now this has passed both the Congress and the Senate, so starting from 2467 # 2010, some border regions will be the same: 2468 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2469 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2470 # (Spanish) 2471 # 2472 # Could not find the new law text, but the proposed law text changes are here: 2473 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2474 # (Gaceta Parlamentaria) 2475 # 2476 # There is also a list of the votes here: 2477 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2478 # 2479 # Our page: 2480 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2481 2482 # From Arthur David Olson (2010-01-20): 2483 # The page 2484 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2485 # includes this text: 2486 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2487 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2488 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2489 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2490 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2491 # horas del primer domingo de noviembre. 2492 # En los municipios fronterizos que se encuentren ubicados en la franja 2493 # fronteriza norte en el territorio comprendido entre la línea 2494 # internacional y la línea paralela ubicada a una distancia de veinte 2495 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2496 # interior del país, la aplicación de este horario estacional surtirá 2497 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2498 # las dos horas del primer domingo de noviembre. 2499 2500 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2501 # The Mexican state of Quintana Roo will likely change to EST in 2015. 2502 # 2503 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2504 # "With this change, the time conflict that has existed between the municipios 2505 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2506 # end. The latter declared itself in rebellion 15 years ago when a time change 2507 # was initiated in Mexico, and since then it has refused to change its time 2508 # zone along with the rest of the country." 2509 # 2510 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2511 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2512 # "...the new time zone will come into effect at two o'clock on the first Sunday 2513 # of February, when we will have to advance the clock one hour from its current 2514 # time..." 2515 # Also, the new zone will not use DST. 2516 # 2517 # From Carlos Raúl Perasso (2015-02-02): 2518 # The decree that modifies the Mexican Hour System Law has finally 2519 # been published at the Diario Oficial de la Federación 2520 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2521 # It establishes 5 zones for Mexico: 2522 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2523 # includes most of Mexico, excluding what's mentioned below. 2524 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the 2525 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía 2526 # de Banderas which lies in Central Zone); Sinaloa and Sonora. 2527 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2528 # state of Baja California. 2529 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2530 # of Quintana Roo. 2531 # 5- The islands, reefs and keys shall take their timezone from the 2532 # longitude they are located at. 2533 2534 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2535 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2536 Rule Mexico 1939 only - Jun 25 0:00 0 S 2537 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2538 Rule Mexico 1941 only - Apr 1 0:00 0 S 2539 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2540 Rule Mexico 1944 only - May 1 0:00 0 S 2541 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2542 Rule Mexico 1950 only - Jul 30 0:00 0 S 2543 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2544 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2545 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2546 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2547 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2548 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2549 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2550 # Quintana Roo; represented by Cancún 2551 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2552 -6:00 - CST 1981 Dec 23 2553 -5:00 Mexico E%sT 1998 Aug 2 2:00 2554 -6:00 Mexico C%sT 2015 Feb 1 2:00 2555 -5:00 - EST 2556 # Campeche, Yucatán; represented by Mérida 2557 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2558 -6:00 - CST 1981 Dec 23 2559 -5:00 - EST 1982 Dec 2 2560 -6:00 Mexico C%sT 2561 # Coahuila, Nuevo León, Tamaulipas (near US border) 2562 # This includes the following municipalities: 2563 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, 2564 # Guerrero, Hidalgo. 2565 # in Nuevo León: Anáhuac, Los Aldama. 2566 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, 2567 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. 2568 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, 2569 # 2016-03-12 2570 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2571 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2572 -6:00 - CST 1988 2573 -6:00 US C%sT 1989 2574 -6:00 Mexico C%sT 2010 2575 -6:00 US C%sT 2576 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) 2577 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2578 -6:00 - CST 1988 2579 -6:00 US C%sT 1989 2580 -6:00 Mexico C%sT 2581 # Central Mexico 2582 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2583 -7:00 - MST 1927 Jun 10 23:00 2584 -6:00 - CST 1930 Nov 15 2585 -7:00 - MST 1931 May 1 23:00 2586 -6:00 - CST 1931 Oct 2587 -7:00 - MST 1932 Apr 1 2588 -6:00 Mexico C%sT 2001 Sep 30 2:00 2589 -6:00 - CST 2002 Feb 20 2590 -6:00 Mexico C%sT 2591 # Chihuahua (near US border) 2592 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, 2593 # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2594 # (See the 2016-03-12 El Universal source mentioned above.) 2595 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2596 -7:00 - MST 1927 Jun 10 23:00 2597 -6:00 - CST 1930 Nov 15 2598 -7:00 - MST 1931 May 1 23:00 2599 -6:00 - CST 1931 Oct 2600 -7:00 - MST 1932 Apr 1 2601 -6:00 - CST 1996 2602 -6:00 Mexico C%sT 1998 2603 -6:00 - CST 1998 Apr Sun>=1 3:00 2604 -7:00 Mexico M%sT 2010 2605 -7:00 US M%sT 2606 # Chihuahua (away from US border) 2607 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2608 -7:00 - MST 1927 Jun 10 23:00 2609 -6:00 - CST 1930 Nov 15 2610 -7:00 - MST 1931 May 1 23:00 2611 -6:00 - CST 1931 Oct 2612 -7:00 - MST 1932 Apr 1 2613 -6:00 - CST 1996 2614 -6:00 Mexico C%sT 1998 2615 -6:00 - CST 1998 Apr Sun>=1 3:00 2616 -7:00 Mexico M%sT 2617 # Sonora 2618 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2619 -7:00 - MST 1927 Jun 10 23:00 2620 -6:00 - CST 1930 Nov 15 2621 -7:00 - MST 1931 May 1 23:00 2622 -6:00 - CST 1931 Oct 2623 -7:00 - MST 1932 Apr 1 2624 -6:00 - CST 1942 Apr 24 2625 -7:00 - MST 1949 Jan 14 2626 -8:00 - PST 1970 2627 -7:00 Mexico M%sT 1999 2628 -7:00 - MST 2629 2630 # From Alexander Krivenyshev (2010-04-21): 2631 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2632 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2633 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2634 # 2635 # (Spanish) 2636 # Bahía de Banderas homologa su horario al del centro del 2637 # país, a partir de este domingo 2638 # http://www.nayarit.gob.mx/notes.asp?id=20748 2639 # 2640 # Bahía de Banderas homologa su horario con el del Centro del 2641 # País 2642 # 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 2643 # 2644 # (English) 2645 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2646 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2647 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2648 # 2649 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2650 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2651 # zone ..." 2652 # Baja California Sur, Nayarit, Sinaloa 2653 2654 # From Arthur David Olson (2010-05-01): 2655 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2656 2657 # Mazatlán 2658 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2659 -7:00 - MST 1927 Jun 10 23:00 2660 -6:00 - CST 1930 Nov 15 2661 -7:00 - MST 1931 May 1 23:00 2662 -6:00 - CST 1931 Oct 2663 -7:00 - MST 1932 Apr 1 2664 -6:00 - CST 1942 Apr 24 2665 -7:00 - MST 1949 Jan 14 2666 -8:00 - PST 1970 2667 -7:00 Mexico M%sT 2668 2669 # Bahía de Banderas 2670 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2671 -7:00 - MST 1927 Jun 10 23:00 2672 -6:00 - CST 1930 Nov 15 2673 -7:00 - MST 1931 May 1 23:00 2674 -6:00 - CST 1931 Oct 2675 -7:00 - MST 1932 Apr 1 2676 -6:00 - CST 1942 Apr 24 2677 -7:00 - MST 1949 Jan 14 2678 -8:00 - PST 1970 2679 -7:00 Mexico M%sT 2010 Apr 4 2:00 2680 -6:00 Mexico C%sT 2681 2682 # Baja California 2683 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2684 -7:00 - MST 1924 2685 -8:00 - PST 1927 Jun 10 23:00 2686 -7:00 - MST 1930 Nov 15 2687 -8:00 - PST 1931 Apr 1 2688 -8:00 1:00 PDT 1931 Sep 30 2689 -8:00 - PST 1942 Apr 24 2690 -8:00 1:00 PWT 1945 Aug 14 23:00u 2691 -8:00 1:00 PPT 1945 Nov 12 # Peace 2692 -8:00 - PST 1948 Apr 5 2693 -8:00 1:00 PDT 1949 Jan 14 2694 -8:00 - PST 1954 2695 -8:00 CA P%sT 1961 2696 -8:00 - PST 1976 2697 -8:00 US P%sT 1996 2698 -8:00 Mexico P%sT 2001 2699 -8:00 US P%sT 2002 Feb 20 2700 -8:00 Mexico P%sT 2010 2701 -8:00 US P%sT 2702 # From Paul Eggert (2006-03-22): 2703 # Formerly there was an America/Ensenada zone, which differed from 2704 # America/Tijuana only in that it did not observe DST from 1976 2705 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2706 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2707 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2708 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2709 # DST-observance was a town-by-town matter back then. This concerns 2710 # data after 1970 so most likely there should be at least one Zone 2711 # other than America/Tijuana for Baja, but it's not clear yet what its 2712 # name or contents should be. 2713 # 2714 # From Paul Eggert (2015-10-08): 2715 # Formerly there was an America/Santa_Isabel zone, but this appears to 2716 # have come from a misreading of 2717 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2718 # It has been moved to the 'backward' file. 2719 # 2720 # 2721 # Revillagigedo Is 2722 # no information 2723 2724 ############################################################################### 2725 2726 # Anguilla 2727 # Antigua and Barbuda 2728 # See America/Port_of_Spain. 2729 2730 # Bahamas 2731 # 2732 # For 1899 Milne gives -5:09:29.5; round that. 2733 # 2734 # From Sue Williams (2006-12-07): 2735 # The Bahamas announced about a month ago that they plan to change their DST 2736 # rules to sync with the U.S. starting in 2007.... 2737 # http://www.jonesbahamas.com/?c=45&a=10412 2738 2739 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2740 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2741 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2742 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2743 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2744 -5:00 Bahamas E%sT 1976 2745 -5:00 US E%sT 2746 2747 # Barbados 2748 2749 # For 1899 Milne gives -3:58:29.2; round that. 2750 2751 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2752 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2753 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2754 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2755 Rule Barb 1979 only - Sep 30 2:00 0 S 2756 Rule Barb 1980 only - Sep 25 2:00 0 S 2757 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2758 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2759 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2760 -4:00 Barb A%sT 2761 2762 # Belize 2763 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2764 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2765 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 2766 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST 2767 Rule Belize 1973 only - Dec 5 0:00 1:00 CDT 2768 Rule Belize 1974 only - Feb 9 0:00 0 CST 2769 Rule Belize 1982 only - Dec 18 0:00 1:00 CDT 2770 Rule Belize 1983 only - Feb 12 0:00 0 CST 2771 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2772 Zone America/Belize -5:52:48 - LMT 1912 Apr 2773 -6:00 Belize %s 2774 2775 # Bermuda 2776 2777 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2778 # Bermuda dockyard, Ireland I; round that. 2779 2780 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2781 2782 # Next year, however, clocks in the US will go forward on the second Sunday 2783 # in March, until the first Sunday in November. And, after the Time Zone 2784 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2785 # Friday, the same thing will happen in Bermuda. 2786 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2787 2788 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2789 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2790 -4:00 - AST 1974 Apr 28 2:00 2791 -4:00 Canada A%sT 1976 2792 -4:00 US A%sT 2793 2794 # Cayman Is 2795 # See America/Panama. 2796 2797 # Costa Rica 2798 2799 # Milne gives -5:36:13.3 as San José mean time; round to nearest. 2800 2801 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2802 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2803 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2804 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2805 # IATA SSIM (1991-09) says the following was at 1:00; 2806 # go with Shanks & Pottenger. 2807 Rule CR 1991 only - Jul 1 0:00 0 S 2808 Rule CR 1992 only - Mar 15 0:00 0 S 2809 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2810 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2811 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2812 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2813 -6:00 CR C%sT 2814 # Coco 2815 # no information; probably like America/Costa_Rica 2816 2817 # Cuba 2818 2819 # From Paul Eggert (2013-02-21): 2820 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2821 # for the port, and -5:30 for meteorological observations. 2822 # For now, stick with Shanks & Pottenger. 2823 2824 # From Arthur David Olson (1999-03-29): 2825 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2826 # the Cuban National Team and the Baltimore Orioles was carried live on 2827 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2828 # During the game, play-by-play announcer Jim Hunter noted that 2829 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2830 # Time today." (The "two hour" remark referred to losing one hour of 2831 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2832 # to DST - and one more hour on 1999-04-04 - when the announcers will have 2833 # returned to Baltimore, which switches on that date.) 2834 2835 # From Steffen Thorsen (2013-11-11): 2836 # DST start in Cuba in 2004 ... does not follow the same rules as the 2837 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2838 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2839 2840 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2841 # Cuba is not going back to standard time this year. 2842 # From Paul Eggert (2006-03-22): 2843 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2844 # says that it's due to a problem at the Antonio Guiteras 2845 # thermoelectric plant, and says "This October there will be no return 2846 # to normal hours (after daylight saving time)". 2847 # For now, let's assume that it's a temporary measure. 2848 2849 # From Carlos A. Carnero Delgado (2005-11-12): 2850 # This year (just like in 2004-2005) there's no change in time zone 2851 # adjustment in Cuba. We will stay in daylight saving time: 2852 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2853 2854 # From Jesper Nørgaard Welen (2006-10-21): 2855 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2856 # the 3 years of permanent DST next weekend, see 2857 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2858 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2859 # watches should be set back one hour - going back to 00:00 hours - returning 2860 # to the normal schedule.... 2861 2862 # From Paul Eggert (2007-03-02): 2863 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2864 # says Cuban clocks will advance at midnight on March 10. 2865 # For lack of better information, assume Cuba will use US rules, 2866 # except that it switches at midnight standard time as usual. 2867 # 2868 # From Steffen Thorsen (2007-10-25): 2869 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2870 # earlier - on the last Sunday of October, just like in 2006. 2871 # 2872 # He supplied these references: 2873 # 2874 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2875 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2876 # 2877 # From Alex Krivenyshev (2007-10-25): 2878 # Here is also article from Granma (Cuba): 2879 # 2880 # Regirá el Horario Normal desde el próximo domingo 28 de octubre 2881 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2882 # 2883 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2884 2885 # From Arthur David Olson (2008-03-09): 2886 # I'm in Maryland which is now observing United States Eastern Daylight 2887 # Time. At 9:44 local time I used RealPlayer to listen to 2888 # http://media.enet.cu/radioreloj 2889 # a Cuban information station, and heard 2890 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2891 # indicating that Cuba is still on standard time. 2892 2893 # From Steffen Thorsen (2008-03-12): 2894 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2895 # It was announced yesterday, according to this source (in Spanish): 2896 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2897 # 2898 # Some more background information is posted here: 2899 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2900 # 2901 # The article also says that Cuba has been observing DST since 1963, 2902 # while Shanks (and tzdata) has 1965 as the first date (except in the 2903 # 1940's). Many other web pages in Cuba also claim that it has been 2904 # observed since 1963, but with the exception of 1970 - an exception 2905 # which is not present in tzdata/Shanks. So there is a chance we need to 2906 # change some historic records as well. 2907 # 2908 # One example: 2909 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2910 2911 # From Jesper Nørgaard Welen (2008-03-13): 2912 # The Cuban time change has just been confirmed on the most authoritative 2913 # web site, the Granma. Please check out 2914 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2915 # 2916 # Basically as expected after Steffen Thorsen's information, the change 2917 # will take place midnight between Saturday and Sunday. 2918 2919 # From Arthur David Olson (2008-03-12): 2920 # Assume Sun>=15 (third Sunday) going forward. 2921 2922 # From Alexander Krivenyshev (2009-03-04) 2923 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2924 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2925 # not on midnight March 14 / March 15 as previously thought. 2926 # 2927 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2928 # (in Spanish) 2929 2930 # From Arthur David Olson (2009-03-09) 2931 # I listened over the Internet to 2932 # http://media.enet.cu/readioreloj 2933 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2934 # the time was announced as "diez cinco" - the same time as here, indicating 2935 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2936 2937 # From Steffen Thorsen (2011-03-08): 2938 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2939 # this year. Nothing about the end date known so far (if that has 2940 # changed at all). 2941 # 2942 # Source: 2943 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2944 # 2945 # Our info: 2946 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2947 # 2948 # From Steffen Thorsen (2011-10-30) 2949 # Cuba will end DST two weeks later this year. Instead of going back 2950 # tonight, it has been delayed to 2011-11-13 at 01:00. 2951 # 2952 # One source (Spanish) 2953 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2954 # 2955 # Our page: 2956 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2957 # 2958 # From Steffen Thorsen (2012-03-01) 2959 # According to Radio Reloj, Cuba will start DST on Midnight between March 2960 # 31 and April 1. 2961 # 2962 # Radio Reloj has the following info (Spanish): 2963 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2964 # 2965 # Our info on it: 2966 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2967 2968 # From Steffen Thorsen (2012-11-03): 2969 # Radio Reloj and many other sources report that Cuba is changing back 2970 # to standard time on 2012-11-04: 2971 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2972 # From Paul Eggert (2012-11-03): 2973 # For now, assume the future rule is first Sunday in November. 2974 2975 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2976 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2977 Rule Cuba 1928 only - Oct 10 0:00 0 S 2978 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2979 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2980 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2981 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2982 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2983 Rule Cuba 1965 only - Sep 30 0:00 0 S 2984 Rule Cuba 1966 only - May 29 0:00 1:00 D 2985 Rule Cuba 1966 only - Oct 2 0:00 0 S 2986 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2987 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2988 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2989 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2990 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2991 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2992 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2993 Rule Cuba 1978 only - May 7 0:00 1:00 D 2994 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2995 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2996 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2997 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2998 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2999 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 3000 Rule Cuba 1996 only - Oct 6 0:00s 0 S 3001 Rule Cuba 1997 only - Oct 12 0:00s 0 S 3002 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 3003 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 3004 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 3005 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 3006 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 3007 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 3008 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 3009 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 3010 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 3011 Rule Cuba 2011 only - Nov 13 0:00s 0 S 3012 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 3013 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 3014 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 3015 3016 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3017 Zone America/Havana -5:29:28 - LMT 1890 3018 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 3019 -5:00 Cuba C%sT 3020 3021 # Dominica 3022 # See America/Port_of_Spain. 3023 3024 # Dominican Republic 3025 3026 # From Steffen Thorsen (2000-10-30): 3027 # Enrique Morales reported to me that the Dominican Republic has changed the 3028 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 3029 # http://www.listin.com.do/antes/261000/republica/princi.html 3030 3031 # From Paul Eggert (2000-12-04): 3032 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 3033 3034 # From Rives McDow (2000-12-01): 3035 # Dominican Republic changed its mind and presidential decree on Tuesday, 3036 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 3037 # Dominican Republic will be reverting to 8 hours from the International Date 3038 # Line, and will not be using DST in the foreseeable future. The reason they 3039 # decided to use DST was to be in synch with Puerto Rico, who was also going 3040 # to implement DST. When Puerto Rico didn't implement DST, the president 3041 # decided to revert. 3042 3043 3044 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3045 Rule DR 1966 only - Oct 30 0:00 1:00 EDT 3046 Rule DR 1967 only - Feb 28 0:00 0 EST 3047 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 3048 Rule DR 1970 only - Feb 21 0:00 0 EST 3049 Rule DR 1971 only - Jan 20 0:00 0 EST 3050 Rule DR 1972 1974 - Jan 21 0:00 0 EST 3051 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3052 Zone America/Santo_Domingo -4:39:36 - LMT 1890 3053 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3054 -5:00 DR %s 1974 Oct 27 3055 -4:00 - AST 2000 Oct 29 2:00 3056 -5:00 US E%sT 2000 Dec 3 1:00 3057 -4:00 - AST 3058 3059 # El Salvador 3060 3061 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3062 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 3063 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 3064 # There are too many San Salvadors elsewhere, so use America/El_Salvador 3065 # instead of America/San_Salvador. 3066 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3067 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 3068 -6:00 Salv C%sT 3069 3070 # Grenada 3071 # Guadeloupe 3072 # St Barthélemy 3073 # St Martin (French part) 3074 # See America/Port_of_Spain. 3075 3076 # Guatemala 3077 # 3078 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3079 # Diario Co Latino, at 3080 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3081 # says in an article dated 2006-04-19 that the Guatemalan government had 3082 # decided on that date to advance official time by 60 minutes, to lessen the 3083 # impact of the elevated cost of oil.... Daylight saving time will last from 3084 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3085 # From Paul Eggert (2006-06-22): 3086 # The Ministry of Energy and Mines, press release CP-15/2006 3087 # (2006-04-19), says DST ends at 24:00. See 3088 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3089 3090 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3091 Rule Guat 1973 only - Nov 25 0:00 1:00 D 3092 Rule Guat 1974 only - Feb 24 0:00 0 S 3093 Rule Guat 1983 only - May 21 0:00 1:00 D 3094 Rule Guat 1983 only - Sep 22 0:00 0 S 3095 Rule Guat 1991 only - Mar 23 0:00 1:00 D 3096 Rule Guat 1991 only - Sep 7 0:00 0 S 3097 Rule Guat 2006 only - Apr 30 0:00 1:00 D 3098 Rule Guat 2006 only - Oct 1 0:00 0 S 3099 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3100 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3101 -6:00 Guat C%sT 3102 3103 # Haiti 3104 # From Gwillim Law (2005-04-15): 3105 # Risto O. Nykänen wrote me that Haiti is now on DST. 3106 # I searched for confirmation, and I found a press release 3107 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3108 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3109 # 3110 # "The Prime Minister's Communication Office notifies the public in general 3111 # and the press in particular that, following a decision of the Interior 3112 # Ministry and the Territorial Collectivities [I suppose that means the 3113 # provinces], Haiti will move to Eastern Daylight Time in the night from next 3114 # Saturday the 2nd to Sunday the 3rd. 3115 # 3116 # "Consequently, the Prime Minister's Communication Office wishes to inform 3117 # the population that the country's clocks will be set forward one hour 3118 # starting at midnight. This provision will hold until the last Saturday in 3119 # October 2005. 3120 # 3121 # "Port-au-Prince, March 31, 2005" 3122 # 3123 # From Steffen Thorsen (2006-04-04): 3124 # I have been informed by users that Haiti observes DST this year like 3125 # last year, so the current "only" rule for 2005 might be changed to a 3126 # "max" rule or to last until 2006. (Who knows if they will observe DST 3127 # next year or if they will extend their DST like US/Canada next year). 3128 # 3129 # I have found this article about it (in French): 3130 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 3131 # 3132 # The reason seems to be an energy crisis. 3133 3134 # From Stephen Colebourne (2007-02-22): 3135 # Some IATA info: Haiti won't be having DST in 2007. 3136 3137 # From Steffen Thorsen (2012-03-11): 3138 # According to several news sources, Haiti will observe DST this year, 3139 # apparently using the same start and end date as USA/Canada. 3140 # So this means they have already changed their time. 3141 # 3142 # http://www.alterpresse.org/spip.php?article12510 3143 # http://radiovision2000haiti.net/home/?p=13253 3144 # 3145 # From Arthur David Olson (2012-03-11): 3146 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3147 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 3148 # Assume a US-style fall back as well. 3149 3150 # From Steffen Thorsen (2013-03-10): 3151 # It appears that Haiti is observing DST this year as well, same rules 3152 # as US/Canada. They did it last year as well, and it looks like they 3153 # are going to observe DST every year now... 3154 # 3155 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3156 # http://www.canalplushaiti.net/?p=6714 3157 3158 # From Steffen Thorsen (2016-03-12): 3159 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3160 # are not going on DST this year. Several other resources confirm this: ... 3161 # http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3162 # http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3163 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3164 3165 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3166 Rule Haiti 1983 only - May 8 0:00 1:00 D 3167 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3168 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3169 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3170 # Go with IATA. 3171 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3172 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3173 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3174 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3175 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3176 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3177 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3178 Zone America/Port-au-Prince -4:49:20 - LMT 1890 3179 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3180 -5:00 Haiti E%sT 3181 3182 # Honduras 3183 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3184 3185 # From Paul Eggert (2006-05-05): 3186 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3187 # saying Honduras will start using DST midnight Saturday, effective 4 3188 # months until September. La Tribuna reported today 3189 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3190 # of Honduras, refused to back down on this. 3191 3192 # From Jesper Nørgaard Welen (2006-08-08): 3193 # It seems that Honduras has returned from DST to standard time this Monday at 3194 # 00:00 hours (prolonging Sunday to 25 hours duration). 3195 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3196 3197 # From Paul Eggert (2006-08-08): 3198 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3199 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3200 # It mentions executive decree 18-2006. 3201 3202 # From Steffen Thorsen (2006-08-17): 3203 # Honduras will observe DST from 2007 to 2009, exact dates are not 3204 # published, I have located this authoritative source: 3205 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 3206 3207 # From Steffen Thorsen (2007-03-30): 3208 # http://www.laprensahn.com/pais_nota.php?id04962=7386 3209 # So it seems that Honduras will not enter DST this year.... 3210 3211 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3212 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3213 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3214 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3215 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3216 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3217 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3218 -6:00 Hond C%sT 3219 # 3220 # Great Swan I ceded by US to Honduras in 1972 3221 3222 # Jamaica 3223 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3224 # unspecified official document, and says "This time is used throughout the 3225 # island". Go with Milne. Round to the nearest second as required by zic. 3226 # 3227 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3228 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3229 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3230 # Manley's supporters associated this act with Manley's nickname "Joshua" 3231 # (recall that in the Bible the sun stood still at Joshua's request), 3232 # and with the Rod of Correction which Manley said he had received from 3233 # Haile Selassie, Emperor of Ethiopia. See: 3234 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3235 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3236 # 3237 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3238 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3239 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3240 -5:00 - EST 1974 3241 -5:00 US E%sT 1984 3242 -5:00 - EST 3243 3244 # Martinique 3245 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3246 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3247 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3248 -4:00 - AST 1980 Apr 6 3249 -4:00 1:00 ADT 1980 Sep 28 3250 -4:00 - AST 3251 3252 # Montserrat 3253 # See America/Port_of_Spain. 3254 3255 # Nicaragua 3256 # 3257 # This uses Shanks & Pottenger for times before 2005. 3258 # 3259 # From Steffen Thorsen (2005-04-12): 3260 # I've got reports from 8 different people that Nicaragua just started 3261 # DST on Sunday 2005-04-10, in order to save energy because of 3262 # expensive petroleum. The exact end date for DST is not yet 3263 # announced, only "September" but some sites also say "mid-September". 3264 # Some background information is available on the President's official site: 3265 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3266 # The Decree, no 23-2005 is available here: 3267 # 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 3268 # 3269 # From Paul Eggert (2005-05-01): 3270 # The decree doesn't say anything about daylight saving, but for now let's 3271 # assume that it is daylight saving.... 3272 # 3273 # From Gwillim Law (2005-04-21): 3274 # The Associated Press story on the time change, which can be found at 3275 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3276 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3277 # time that a change of clocks was applied to save energy was in the year 2000 3278 # during the Arnoldo Alemán administration."... 3279 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3280 # since December 1998. I wasn't able to find any details of Nicaraguan time 3281 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3282 # the effect that we have indirect evidence that DST was observed in 2000. 3283 # 3284 # From Jesper Nørgaard Welen (2005-11-02): 3285 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3286 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3287 # (2005-09-26) 3288 # 3289 # From Jesper Nørgaard Welen (2006-05-05): 3290 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3291 # (my informal translation) 3292 # By order of the president of the republic, Enrique Bolaños, Nicaragua 3293 # advanced by sixty minutes their official time, yesterday at 2 in the 3294 # morning, and will stay that way until 30th of September. 3295 # 3296 # From Jesper Nørgaard Welen (2006-09-30): 3297 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3298 # My informal translation runs: 3299 # The natural sun time is restored in all the national territory, in that the 3300 # time is returned one hour at 01:00 am of October 1 of 2006. 3301 # 3302 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3303 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3304 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3305 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3306 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3307 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3308 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3309 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3310 Zone America/Managua -5:45:08 - LMT 1890 3311 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3312 -6:00 - CST 1973 May 3313 -5:00 - EST 1975 Feb 16 3314 -6:00 Nic C%sT 1992 Jan 1 4:00 3315 -5:00 - EST 1992 Sep 24 3316 -6:00 - CST 1993 3317 -5:00 - EST 1997 3318 -6:00 Nic C%sT 3319 3320 # Panama 3321 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3322 Zone America/Panama -5:18:08 - LMT 1890 3323 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3324 -5:00 - EST 3325 Link America/Panama America/Cayman 3326 3327 # Puerto Rico 3328 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3329 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3330 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3331 -4:00 - AST 1942 May 3 3332 -4:00 US A%sT 1946 3333 -4:00 - AST 3334 3335 # St Kitts-Nevis 3336 # St Lucia 3337 # See America/Port_of_Spain. 3338 3339 # St Pierre and Miquelon 3340 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3341 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3342 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3343 -4:00 - AST 1980 May 3344 -3:00 - -03 1987 3345 -3:00 Canada -03/-02 3346 3347 # St Vincent and the Grenadines 3348 # See America/Port_of_Spain. 3349 3350 # Turks and Caicos 3351 # 3352 # From Chris Dunn in 3353 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3354 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3355 # daylight saving dates for time changes have been adjusted to match 3356 # the recent U.S. change of dates. 3357 # 3358 # From Brian Inglis (2007-04-28): 3359 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3360 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3361 # rows before that there is an out of date entry for Oct: 3362 # "Eastern Standard Times Begins 2007 3363 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3364 # indicating that the normal ET rules are followed. 3365 # 3366 # From Paul Eggert (2014-08-19): 3367 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3368 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3369 # Model this as a switch from EST/EDT to AST ... 3370 # From Chris Walton (2014-11-04): 3371 # ... the TCI government appears to have delayed the switch to 3372 # "permanent daylight saving time" by one year.... 3373 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3374 # 3375 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3376 Zone America/Grand_Turk -4:44:32 - LMT 1890 3377 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3378 -5:00 - EST 1979 3379 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3380 -4:00 - AST 3381 3382 # British Virgin Is 3383 # Virgin Is 3384 # See America/Port_of_Spain. 3385 3386 3387 # Local Variables: 3388 # coding: utf-8 3389 # End: