| northamerica (303975) | northamerica (309583) |
|---|---|
| 1# This file is in the public domain, so clarified as of 2# 2009-05-17 by Arthur David Olson. 3 4# also includes Central America and the Caribbean 5 6# This file is by no means authoritative; if you think you know better, 7# go ahead and edit the file (and please send any changes to 8# tz@iana.org for general use in the future). For more, please see --- 10 unchanged lines hidden (view full) --- 19# From Paul Eggert (1999-03-31): 20# Howse writes (pp 121-125) that time zones were invented by 21# Professor Charles Ferdinand Dowd (1825-1904), 22# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 23# His pamphlet "A System of National Time for Railroads" (1870) 24# was the result of his proposals at the Convention of Railroad Trunk Lines 25# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 26# but in 1872-05 he moved the proposed origin to Greenwich. | 1# This file is in the public domain, so clarified as of 2# 2009-05-17 by Arthur David Olson. 3 4# also includes Central America and the Caribbean 5 6# This file is by no means authoritative; if you think you know better, 7# go ahead and edit the file (and please send any changes to 8# tz@iana.org for general use in the future). For more, please see --- 10 unchanged lines hidden (view full) --- 19# From Paul Eggert (1999-03-31): 20# Howse writes (pp 121-125) that time zones were invented by 21# Professor Charles Ferdinand Dowd (1825-1904), 22# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 23# His pamphlet "A System of National Time for Railroads" (1870) 24# was the result of his proposals at the Convention of Railroad Trunk Lines 25# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 26# but in 1872-05 he moved the proposed origin to Greenwich. |
| 27# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 28# and the most of the country soon followed suit. | |
| 29 | 27 |
| 28# From Paul Eggert (2016-09-21): 29# Dowd's proposal left many details unresolved, such as where to draw 30# lines between time zones. The key individual who made time zones 31# work in the US was William Frederick Allen - railway engineer, 32# managing editor of the Travelers' Guide, and secretary of the 33# General Time Convention, a railway standardization group. Allen 34# spent months in dialogs with scientific and railway leaders, 35# developed a workable plan to institute time zones, and presented it 36# to the General Time Convention on 1883-04-11, saying that his plan 37# meant "local time would be practically abolished" - a plus for 38# railway scheduling. By the next convention on 1883-10-11 nearly all 39# railroads had agreed and it took effect on 1883-11-18 at 12:00. 40# That Sunday was called the "day of two noons", as the eastern parts 41# of the new zones observed noon twice. Allen witnessed the 42# transition in New York City, writing: 43# 44# I heard the bells of St. Paul's strike on the old time. Four 45# minutes later, obedient to the electrical signal from the Naval 46# Observatory ... the time-ball made its rapid descent, the chimes 47# of old Trinity rang twelve measured strokes, and local time was 48# abandoned, probably forever. 49# 50# Most of the US soon followed suit. See: 51# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 52# http://dx.doi.org/10.2307/3105430 53 |
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| 30# From Paul Eggert (2005-04-16): 31# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 32# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 33 34# From Paul Eggert (2006-03-22): 35# A good source for time zone historical data in the US is 36# Thomas G. Shanks, The American Atlas (5th edition), 37# San Diego: ACS Publications, Inc. (1991). --- 282 unchanged lines hidden (view full) --- 320# are issued for the "sale of class 'B' alcohol after prohibited 321# hours" within the deviated hour of this change every year.... 322# 323# From Douglas R. Bomberg (2007-03-12): 324# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 325# Statue 175 closer in synch with the US Congress' intent.... 326# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 327 | 54# From Paul Eggert (2005-04-16): 55# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 56# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 57 58# From Paul Eggert (2006-03-22): 59# A good source for time zone historical data in the US is 60# Thomas G. Shanks, The American Atlas (5th edition), 61# San Diego: ACS Publications, Inc. (1991). --- 282 unchanged lines hidden (view full) --- 344# are issued for the "sale of class 'B' alcohol after prohibited 345# hours" within the deviated hour of this change every year.... 346# 347# From Douglas R. Bomberg (2007-03-12): 348# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 349# Statue 175 closer in synch with the US Congress' intent.... 350# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 351 |
| 352# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 353# Fort Pierre is technically located in the Mountain time zone as is 354# the rest of Stanley County. Most of Stanley County and Fort Pierre 355# uses the Central time zone due to doing most of their business in 356# Pierre so it simplifies schedules. I have lived in Stanley County 357# all my life and it has been that way since I can remember. (43 years!) 358# 359# From Paul Eggert (2015-12-25): 360# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 361 |
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| 328# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 329Rule Chicago 1920 only - Jun 13 2:00 1:00 D 330Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 331Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 332Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 333Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 334Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 335# Zone NAME GMTOFF RULES FORMAT [UNTIL] --- 62 unchanged lines hidden (view full) --- 398 399# US Pacific time, represented by Los Angeles 400# 401# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 402# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 403# north of the Salmon River, and the towns of Burgdorf and Warren), 404# Nevada (except West Wendover), Oregon (except the northern 3/4 of 405# Malheur county), and Washington | 362# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 363Rule Chicago 1920 only - Jun 13 2:00 1:00 D 364Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 365Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 366Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 367Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 368Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 369# Zone NAME GMTOFF RULES FORMAT [UNTIL] --- 62 unchanged lines hidden (view full) --- 432 433# US Pacific time, represented by Los Angeles 434# 435# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 436# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 437# north of the Salmon River, and the towns of Burgdorf and Warren), 438# Nevada (except West Wendover), Oregon (except the northern 3/4 of 439# Malheur county), and Washington |
| 440 441# From Paul Eggert (2016-08-20): 442# In early February 1948, in response to California's electricity shortage, 443# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 444# causing electric clocks to lose six minutes per day. (This did not change 445# legal time, and is not part of the data here.) See: 446# Ross SA. An energy crisis from the past: Northern California in 1948. 447# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 448# 1973-11. http://escholarship.org/uc/item/8x22k30c |
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| 406# | 449# |
| 450# In another measure to save electricity, DST was instituted from 1948-03-14 451# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 452# the fallback transition earlier. See pages 3-4 of: 453# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 454# 455# In response: 456# 457# Governor Warren received a torrent of objecting mail, and it is not too much 458# to speculate that the objections to Daylight Saving Time were one important 459# factor in the defeat of the Dewey-Warren Presidential ticket in California. 460# -- Ross, p 25 461# 462# On December 8 the governor exercised the option, setting the date to January 1 463# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 464# 465# Despite the controversy, in 1949 California voters approved Proposition 12, 466# which established DST from April's last Sunday at 01:00 until September's 467# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 468# the fall-back date to October's last Sunday. See: 469# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 470# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 471# |
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| 407# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | 472# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 408Rule CA 1948 only - Mar 14 2:00 1:00 D | 473Rule CA 1948 only - Mar 14 2:01 1:00 D |
| 409Rule CA 1949 only - Jan 1 2:00 0 S | 474Rule CA 1949 only - Jan 1 2:00 0 S |
| 410Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D | 475Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D |
| 411Rule CA 1950 1961 - Sep lastSun 2:00 0 S 412Rule CA 1962 1966 - Oct lastSun 2:00 0 S 413# Zone NAME GMTOFF RULES FORMAT [UNTIL] 414Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 415 -8:00 US P%sT 1946 416 -8:00 CA P%sT 1967 417 -8:00 US P%sT 418 --- 57 unchanged lines hidden (view full) --- 476# that meant they were on Pacific time, they said no - they were on their 477# own time. I asked about daylight saving; they said it wasn't used. I 478# did not inquire about practices in the past. 479 480# From Arthur David Olson (2011-08-17): 481# For lack of better information, assume that Metlakatla's 482# abandonment of use of daylight saving resulted from the 1983 vote. 483 | 476Rule CA 1950 1961 - Sep lastSun 2:00 0 S 477Rule CA 1962 1966 - Oct lastSun 2:00 0 S 478# Zone NAME GMTOFF RULES FORMAT [UNTIL] 479Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 480 -8:00 US P%sT 1946 481 -8:00 CA P%sT 1967 482 -8:00 US P%sT 483 --- 57 unchanged lines hidden (view full) --- 541# that meant they were on Pacific time, they said no - they were on their 542# own time. I asked about daylight saving; they said it wasn't used. I 543# did not inquire about practices in the past. 544 545# From Arthur David Olson (2011-08-17): 546# For lack of better information, assume that Metlakatla's 547# abandonment of use of daylight saving resulted from the 1983 vote. 548 |
| 549# From Steffen Thorsen (2015-11-09): 550# It seems Metlakatla did go off PST on Sunday, November 1, changing 551# their time to AKST and are going to follow Alaska's DST, switching 552# between AKST and AKDT from now on.... 553# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 554 |
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| 484# Zone NAME GMTOFF RULES FORMAT [UNTIL] 485Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 486 -8:57:41 - LMT 1900 Aug 20 12:00 487 -8:00 - PST 1942 488 -8:00 US P%sT 1946 489 -8:00 - PST 1969 490 -8:00 US P%sT 1980 Apr 27 2:00 491 -9:00 US Y%sT 1980 Oct 26 2:00 --- 9 unchanged lines hidden (view full) --- 501 -9:00 US Y%sT 1983 Nov 30 502 -9:00 US AK%sT 503Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 504 -8:46:18 - LMT 1900 Aug 20 12:00 505 -8:00 - PST 1942 506 -8:00 US P%sT 1946 507 -8:00 - PST 1969 508 -8:00 US P%sT 1983 Oct 30 2:00 | 555# Zone NAME GMTOFF RULES FORMAT [UNTIL] 556Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 557 -8:57:41 - LMT 1900 Aug 20 12:00 558 -8:00 - PST 1942 559 -8:00 US P%sT 1946 560 -8:00 - PST 1969 561 -8:00 US P%sT 1980 Apr 27 2:00 562 -9:00 US Y%sT 1980 Oct 26 2:00 --- 9 unchanged lines hidden (view full) --- 572 -9:00 US Y%sT 1983 Nov 30 573 -9:00 US AK%sT 574Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 575 -8:46:18 - LMT 1900 Aug 20 12:00 576 -8:00 - PST 1942 577 -8:00 US P%sT 1946 578 -8:00 - PST 1969 579 -8:00 US P%sT 1983 Oct 30 2:00 |
| 509 -8:00 - PST | 580 -8:00 - PST 2015 Nov 1 2:00 581 -9:00 US AK%sT |
| 510Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 511 -9:18:55 - LMT 1900 Aug 20 12:00 512 -9:00 - YST 1942 513 -9:00 US Y%sT 1946 514 -9:00 - YST 1969 515 -9:00 US Y%sT 1983 Nov 30 516 -9:00 US AK%sT 517Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 --- 1651 unchanged lines hidden (view full) --- 2169Rule NT_YK 1945 only - Sep 30 2:00 0 S 2170Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2171Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2172Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2173Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2174Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2175# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2176# aka Panniqtuuq | 582Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 583 -9:18:55 - LMT 1900 Aug 20 12:00 584 -9:00 - YST 1942 585 -9:00 US Y%sT 1946 586 -9:00 - YST 1969 587 -9:00 US Y%sT 1983 Nov 30 588 -9:00 US AK%sT 589Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 --- 1651 unchanged lines hidden (view full) --- 2241Rule NT_YK 1945 only - Sep 30 2:00 0 S 2242Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2243Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2244Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2245Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2246Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2247# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2248# aka Panniqtuuq |
| 2177Zone America/Pangnirtung 0 - zzz 1921 # trading post est. | 2249Zone America/Pangnirtung 0 - -00 1921 # trading post est. |
| 2178 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2179 -5:00 Canada E%sT 1999 Oct 31 2:00 2180 -6:00 Canada C%sT 2000 Oct 29 2:00 2181 -5:00 Canada E%sT 2182# formerly Frobisher Bay | 2250 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2251 -5:00 Canada E%sT 1999 Oct 31 2:00 2252 -6:00 Canada C%sT 2000 Oct 29 2:00 2253 -5:00 Canada E%sT 2254# formerly Frobisher Bay |
| 2183Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. | 2255Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. |
| 2184 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2185 -6:00 Canada C%sT 2000 Oct 29 2:00 2186 -5:00 Canada E%sT 2187# aka Qausuittuq | 2256 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2257 -6:00 Canada C%sT 2000 Oct 29 2:00 2258 -5:00 Canada E%sT 2259# aka Qausuittuq |
| 2188Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded | 2260Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded |
| 2189 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2190 -5:00 - EST 2001 Apr 1 3:00 2191 -6:00 Canada C%sT 2006 Oct 29 2:00 2192 -5:00 - EST 2007 Mar 11 3:00 2193 -6:00 Canada C%sT 2194# aka Kangiqiniq | 2261 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2262 -5:00 - EST 2001 Apr 1 3:00 2263 -6:00 Canada C%sT 2006 Oct 29 2:00 2264 -5:00 - EST 2007 Mar 11 3:00 2265 -6:00 Canada C%sT 2266# aka Kangiqiniq |
| 2195Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded | 2267Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded |
| 2196 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2197 -5:00 - EST 2001 Apr 1 3:00 2198 -6:00 Canada C%sT 2199# aka Iqaluktuuttiaq | 2268 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2269 -5:00 - EST 2001 Apr 1 3:00 2270 -6:00 Canada C%sT 2271# aka Iqaluktuuttiaq |
| 2200Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? | 2272Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? |
| 2201 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2202 -6:00 Canada C%sT 2000 Oct 29 2:00 2203 -5:00 - EST 2000 Nov 5 0:00 2204 -6:00 - CST 2001 Apr 1 3:00 2205 -7:00 Canada M%sT | 2273 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2274 -6:00 Canada C%sT 2000 Oct 29 2:00 2275 -5:00 - EST 2000 Nov 5 0:00 2276 -6:00 - CST 2001 Apr 1 3:00 2277 -7:00 Canada M%sT |
| 2206Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? | 2278Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? |
| 2207 -7:00 NT_YK M%sT 1980 2208 -7:00 Canada M%sT | 2279 -7:00 NT_YK M%sT 1980 2280 -7:00 Canada M%sT |
| 2209Zone America/Inuvik 0 - zzz 1953 # Inuvik founded | 2281Zone America/Inuvik 0 - -00 1953 # Inuvik founded |
| 2210 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2211 -7:00 NT_YK M%sT 1980 2212 -7:00 Canada M%sT 2213Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2214 -9:00 NT_YK Y%sT 1967 May 28 0:00 2215 -8:00 NT_YK P%sT 1980 2216 -8:00 Canada P%sT 2217Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 --- 235 unchanged lines hidden (view full) --- 2453 -5:00 Mexico E%sT 1998 Aug 2 2:00 2454 -6:00 Mexico C%sT 2015 Feb 1 2:00 2455 -5:00 - EST 2456# Campeche, Yucat��n; represented by M��rida 2457Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2458 -6:00 - CST 1981 Dec 23 2459 -5:00 - EST 1982 Dec 2 2460 -6:00 Mexico C%sT | 2282 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2283 -7:00 NT_YK M%sT 1980 2284 -7:00 Canada M%sT 2285Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2286 -9:00 NT_YK Y%sT 1967 May 28 0:00 2287 -8:00 NT_YK P%sT 1980 2288 -8:00 Canada P%sT 2289Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 --- 235 unchanged lines hidden (view full) --- 2525 -5:00 Mexico E%sT 1998 Aug 2 2:00 2526 -6:00 Mexico C%sT 2015 Feb 1 2:00 2527 -5:00 - EST 2528# Campeche, Yucat��n; represented by M��rida 2529Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2530 -6:00 - CST 1981 Dec 23 2531 -5:00 - EST 1982 Dec 2 2532 -6:00 Mexico C%sT |
| 2461# Coahuila, Durango, Nuevo Le��n, Tamaulipas (near US border) | 2533# Coahuila, Nuevo Le��n, Tamaulipas (near US border) 2534# This includes the following municipalities: 2535# in Coahuila: Ocampo, Acu��a, Zaragoza, Jim��nez, Piedras Negras, Nava, 2536# Guerrero, Hidalgo. 2537# in Nuevo Le��n: An��huac, Los Aldama. 2538# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alem��n, Camargo, 2539# Gustavo D��az Ordaz, Reynosa, R��o Bravo, Valle Hermoso, Matamoros. 2540# See: Inicia ma��ana Horario de Verano en zona fronteriza, El Universal, 2541# 2016-03-12 2542# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza |
| 2462Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2463 -6:00 - CST 1988 2464 -6:00 US C%sT 1989 2465 -6:00 Mexico C%sT 2010 2466 -6:00 US C%sT | 2543Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2544 -6:00 - CST 1988 2545 -6:00 US C%sT 1989 2546 -6:00 Mexico C%sT 2010 2547 -6:00 US C%sT |
| 2467# Coahuila, Durango, Nuevo Le��n, Tamaulipas (away from US border) | 2548# Durango; Coahuila, Nuevo Le��n, Tamaulipas (away from US border) |
| 2468Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2469 -6:00 - CST 1988 2470 -6:00 US C%sT 1989 2471 -6:00 Mexico C%sT 2472# Central Mexico 2473Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2474 -7:00 - MST 1927 Jun 10 23:00 2475 -6:00 - CST 1930 Nov 15 2476 -7:00 - MST 1931 May 1 23:00 2477 -6:00 - CST 1931 Oct 2478 -7:00 - MST 1932 Apr 1 2479 -6:00 Mexico C%sT 2001 Sep 30 2:00 2480 -6:00 - CST 2002 Feb 20 2481 -6:00 Mexico C%sT 2482# Chihuahua (near US border) | 2549Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2550 -6:00 - CST 1988 2551 -6:00 US C%sT 1989 2552 -6:00 Mexico C%sT 2553# Central Mexico 2554Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2555 -7:00 - MST 1927 Jun 10 23:00 2556 -6:00 - CST 1930 Nov 15 2557 -7:00 - MST 1931 May 1 23:00 2558 -6:00 - CST 1931 Oct 2559 -7:00 - MST 1932 Apr 1 2560 -6:00 Mexico C%sT 2001 Sep 30 2:00 2561 -6:00 - CST 2002 Feb 20 2562 -6:00 Mexico C%sT 2563# Chihuahua (near US border) |
| 2564# This includes the municipalities of Janos, Ascensi��n, Ju��rez, Guadalupe, 2565# Pr��xedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2566# (See the 2016-03-12 El Universal source mentioned above.) |
|
| 2483Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2484 -7:00 - MST 1927 Jun 10 23:00 2485 -6:00 - CST 1930 Nov 15 2486 -7:00 - MST 1931 May 1 23:00 2487 -6:00 - CST 1931 Oct 2488 -7:00 - MST 1932 Apr 1 2489 -6:00 - CST 1996 2490 -6:00 Mexico C%sT 1998 --- 71 unchanged lines hidden (view full) --- 2562 -6:00 - CST 1931 Oct 2563 -7:00 - MST 1932 Apr 1 2564 -6:00 - CST 1942 Apr 24 2565 -7:00 - MST 1949 Jan 14 2566 -8:00 - PST 1970 2567 -7:00 Mexico M%sT 2010 Apr 4 2:00 2568 -6:00 Mexico C%sT 2569 | 2567Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2568 -7:00 - MST 1927 Jun 10 23:00 2569 -6:00 - CST 1930 Nov 15 2570 -7:00 - MST 1931 May 1 23:00 2571 -6:00 - CST 1931 Oct 2572 -7:00 - MST 1932 Apr 1 2573 -6:00 - CST 1996 2574 -6:00 Mexico C%sT 1998 --- 71 unchanged lines hidden (view full) --- 2646 -6:00 - CST 1931 Oct 2647 -7:00 - MST 1932 Apr 1 2648 -6:00 - CST 1942 Apr 24 2649 -7:00 - MST 1949 Jan 14 2650 -8:00 - PST 1970 2651 -7:00 Mexico M%sT 2010 Apr 4 2:00 2652 -6:00 Mexico C%sT 2653 |
| 2570# Baja California (near US border) | 2654# Baja California |
| 2571Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2572 -7:00 - MST 1924 2573 -8:00 - PST 1927 Jun 10 23:00 2574 -7:00 - MST 1930 Nov 15 2575 -8:00 - PST 1931 Apr 1 2576 -8:00 1:00 PDT 1931 Sep 30 2577 -8:00 - PST 1942 Apr 24 2578 -8:00 1:00 PWT 1945 Aug 14 23:00u 2579 -8:00 1:00 PPT 1945 Nov 12 # Peace 2580 -8:00 - PST 1948 Apr 5 2581 -8:00 1:00 PDT 1949 Jan 14 2582 -8:00 - PST 1954 2583 -8:00 CA P%sT 1961 2584 -8:00 - PST 1976 2585 -8:00 US P%sT 1996 2586 -8:00 Mexico P%sT 2001 2587 -8:00 US P%sT 2002 Feb 20 2588 -8:00 Mexico P%sT 2010 2589 -8:00 US P%sT | 2655Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2656 -7:00 - MST 1924 2657 -8:00 - PST 1927 Jun 10 23:00 2658 -7:00 - MST 1930 Nov 15 2659 -8:00 - PST 1931 Apr 1 2660 -8:00 1:00 PDT 1931 Sep 30 2661 -8:00 - PST 1942 Apr 24 2662 -8:00 1:00 PWT 1945 Aug 14 23:00u 2663 -8:00 1:00 PPT 1945 Nov 12 # Peace 2664 -8:00 - PST 1948 Apr 5 2665 -8:00 1:00 PDT 1949 Jan 14 2666 -8:00 - PST 1954 2667 -8:00 CA P%sT 1961 2668 -8:00 - PST 1976 2669 -8:00 US P%sT 1996 2670 -8:00 Mexico P%sT 2001 2671 -8:00 US P%sT 2002 Feb 20 2672 -8:00 Mexico P%sT 2010 2673 -8:00 US P%sT |
| 2590# Baja California (away from US border) 2591Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2592 -7:00 - MST 1924 2593 -8:00 - PST 1927 Jun 10 23:00 2594 -7:00 - MST 1930 Nov 15 2595 -8:00 - PST 1931 Apr 1 2596 -8:00 1:00 PDT 1931 Sep 30 2597 -8:00 - PST 1942 Apr 24 2598 -8:00 1:00 PWT 1945 Aug 14 23:00u 2599 -8:00 1:00 PPT 1945 Nov 12 # Peace 2600 -8:00 - PST 1948 Apr 5 2601 -8:00 1:00 PDT 1949 Jan 14 2602 -8:00 - PST 1954 2603 -8:00 CA P%sT 1961 2604 -8:00 - PST 1976 2605 -8:00 US P%sT 1996 2606 -8:00 Mexico P%sT 2001 2607 -8:00 US P%sT 2002 Feb 20 2608 -8:00 Mexico P%sT | |
| 2609# From Paul Eggert (2006-03-22): 2610# Formerly there was an America/Ensenada zone, which differed from 2611# America/Tijuana only in that it did not observe DST from 1976 2612# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2613# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2614# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2615# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2616# DST-observance was a town-by-town matter back then. This concerns 2617# data after 1970 so most likely there should be at least one Zone 2618# other than America/Tijuana for Baja, but it's not clear yet what its 2619# name or contents should be. 2620# | 2674# From Paul Eggert (2006-03-22): 2675# Formerly there was an America/Ensenada zone, which differed from 2676# America/Tijuana only in that it did not observe DST from 1976 2677# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2678# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2679# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2680# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2681# DST-observance was a town-by-town matter back then. This concerns 2682# data after 1970 so most likely there should be at least one Zone 2683# other than America/Tijuana for Baja, but it's not clear yet what its 2684# name or contents should be. 2685# |
| 2686# From Paul Eggert (2015-10-08): 2687# Formerly there was an America/Santa_Isabel zone, but this appears to 2688# have come from a misreading of 2689# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2690# It has been moved to the 'backward' file. 2691# 2692# |
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| 2621# Revillagigedo Is 2622# no information 2623 2624############################################################################### 2625 2626# Anguilla 2627# Antigua and Barbuda 2628# See America/Port_of_Spain. --- 58 unchanged lines hidden (view full) --- 2687 2688# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2689Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2690 -4:00 - AST 1974 Apr 28 2:00 2691 -4:00 Canada A%sT 1976 2692 -4:00 US A%sT 2693 2694# Cayman Is | 2693# Revillagigedo Is 2694# no information 2695 2696############################################################################### 2697 2698# Anguilla 2699# Antigua and Barbuda 2700# See America/Port_of_Spain. --- 58 unchanged lines hidden (view full) --- 2759 2760# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2761Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2762 -4:00 - AST 1974 Apr 28 2:00 2763 -4:00 Canada A%sT 1976 2764 -4:00 US A%sT 2765 2766# Cayman Is |
| 2767# See America/Panama. |
|
| 2695 | 2768 |
| 2696# From Paul Eggert (2015-05-15): 2697# The Cayman government has decided to introduce DST in 2016, the idea being 2698# to keep in sync with New York. The legislation hasn't passed but the change 2699# seems quite likely. See: Meade B. Cayman 27. 2700# http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman 2701 2702Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2703 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2704 -5:00 - EST 2016 2705 -5:00 US E%sT 2706 | |
| 2707# Costa Rica 2708 2709# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2710 2711# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2712Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2713Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2714Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D --- 345 unchanged lines hidden (view full) --- 3060# From Steffen Thorsen (2013-03-10): 3061# It appears that Haiti is observing DST this year as well, same rules 3062# as US/Canada. They did it last year as well, and it looks like they 3063# are going to observe DST every year now... 3064# 3065# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3066# http://www.canalplushaiti.net/?p=6714 3067 | 2769# Costa Rica 2770 2771# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2772 2773# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2774Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2775Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2776Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D --- 345 unchanged lines hidden (view full) --- 3122# From Steffen Thorsen (2013-03-10): 3123# It appears that Haiti is observing DST this year as well, same rules 3124# as US/Canada. They did it last year as well, and it looks like they 3125# are going to observe DST every year now... 3126# 3127# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3128# http://www.canalplushaiti.net/?p=6714 3129 |
| 3130# From Steffen Thorsen (2016-03-12): 3131# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3132# are not going on DST this year. Several other resources confirm this: ... 3133# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3134# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3135# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3136 |
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| 3068# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3069Rule Haiti 1983 only - May 8 0:00 1:00 D 3070Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3071Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3072# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3073# Go with IATA. 3074Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3075Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3076Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3077Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S | 3137# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3138Rule Haiti 1983 only - May 8 0:00 1:00 D 3139Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3140Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3141# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3142# Go with IATA. 3143Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3144Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3145Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3146Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S |
| 3078Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3079Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S | 3147Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3148Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S |
| 3080# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3081Zone America/Port-au-Prince -4:49:20 - LMT 1890 3082 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3083 -5:00 Haiti E%sT 3084 3085# Honduras 3086# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3087 --- 132 unchanged lines hidden (view full) --- 3220 -5:00 - EST 1997 3221 -6:00 Nic C%sT 3222 3223# Panama 3224# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3225Zone America/Panama -5:18:08 - LMT 1890 3226 -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 3227 -5:00 - EST | 3149# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3150Zone America/Port-au-Prince -4:49:20 - LMT 1890 3151 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3152 -5:00 Haiti E%sT 3153 3154# Honduras 3155# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3156 --- 132 unchanged lines hidden (view full) --- 3289 -5:00 - EST 1997 3290 -6:00 Nic C%sT 3291 3292# Panama 3293# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3294Zone America/Panama -5:18:08 - LMT 1890 3295 -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 3296 -5:00 - EST |
| 3297Link America/Panama America/Cayman |
|
| 3228 3229# Puerto Rico 3230# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3231# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3232Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3233 -4:00 - AST 1942 May 3 3234 -4:00 US A%sT 1946 3235 -4:00 - AST --- 25 unchanged lines hidden (view full) --- 3261# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3262# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3263# rows before that there is an out of date entry for Oct: 3264# "Eastern Standard Times Begins 2007 3265# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3266# indicating that the normal ET rules are followed. 3267# 3268# From Paul Eggert (2014-08-19): | 3298 3299# Puerto Rico 3300# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3301# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3302Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3303 -4:00 - AST 1942 May 3 3304 -4:00 US A%sT 1946 3305 -4:00 - AST --- 25 unchanged lines hidden (view full) --- 3331# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3332# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3333# rows before that there is an out of date entry for Oct: 3334# "Eastern Standard Times Begins 2007 3335# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3336# indicating that the normal ET rules are followed. 3337# 3338# From Paul Eggert (2014-08-19): |
| 3269# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: | 3339# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: |
| 3270# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3271# Model this as a switch from EST/EDT to AST ... 3272# From Chris Walton (2014-11-04): 3273# ... the TCI government appears to have delayed the switch to 3274# "permanent daylight saving time" by one year.... 3275# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3276# 3277# Zone NAME GMTOFF RULES FORMAT [UNTIL] --- 14 unchanged lines hidden --- | 3340# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3341# Model this as a switch from EST/EDT to AST ... 3342# From Chris Walton (2014-11-04): 3343# ... the TCI government appears to have delayed the switch to 3344# "permanent daylight saving time" by one year.... 3345# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3346# 3347# Zone NAME GMTOFF RULES FORMAT [UNTIL] --- 14 unchanged lines hidden --- |