2 # @(#)southamerica 8.36
3 # This file is in the public domain, so clarified as of
4 # 2009-05-17 by Arthur David Olson.
6 # This data is by no means authoritative; if you think you know better,
7 # go ahead and edit the file (and please send any changes to
8 # tz@elsie.nci.nih.gov for general use in the future).
10 # From Paul Eggert (2006-03-22):
11 # A good source for time zone historical data outside the U.S. is
12 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
13 # San Diego: ACS Publications, Inc. (2003).
15 # Gwillim Law writes that a good source
16 # for recent time zone data is the International Air Transport
17 # Association's Standard Schedules Information Manual (IATA SSIM),
18 # published semiannually. Law sent in several helpful summaries
19 # of the IATA's data after 1990.
21 # Except where otherwise noted, Shanks & Pottenger is the source for
22 # entries through 1990, and IATA SSIM is the source for entries afterwards.
24 # Earlier editions of these tables used the North American style (e.g. ARST and
25 # ARDT for Argentine Standard and Daylight Time), but the following quote
26 # suggests that it's better to use European style (e.g. ART and ARST).
27 # I suggest the use of _Summer time_ instead of the more cumbersome
28 # _daylight-saving time_. _Summer time_ seems to be in general use
29 # in Europe and South America.
30 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
31 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
33 # Earlier editions of these tables also used the North American style
34 # for time zones in Brazil, but this was incorrect, as Brazilians say
35 # "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
36 # the railroad sector, writes (1999-07-06):
37 # The subject of time zones is currently a matter of discussion/debate in
38 # Brazil. Let's say that "the Brasilia time" is considered the
39 # "official time" because Brasilia is the capital city.
40 # The other three time zones are called "Brasilia time "minus one" or
41 # "plus one" or "plus two". As far as I know there is no such
42 # name/designation as "Eastern Time" or "Central Time".
43 # So I invented the following (English-language) abbreviations for now.
44 # Corrections are welcome!
46 # -2:00 FNT FNST Fernando de Noronha
47 # -3:00 BRT BRST Brasilia
48 # -4:00 AMT AMST Amazon
51 ###############################################################################
53 ###############################################################################
57 # From Bob Devine (1988-01-28):
58 # Argentina: first Sunday in October to first Sunday in April since 1976.
59 # Double Summer time from 1969 to 1974. Switches at midnight.
61 # From U. S. Naval Observatory (1988-01-199):
62 # ARGENTINA 3 H BEHIND UTC
64 # From Hernan G. Otero (1995-06-26):
65 # I am sending modifications to the Argentine time zone table...
66 # AR was chosen because they are the ISO letters that represent Argentina.
68 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
69 Rule Arg 1930 only - Dec 1 0:00 1:00 S
70 Rule Arg 1931 only - Apr 1 0:00 0 -
71 Rule Arg 1931 only - Oct 15 0:00 1:00 S
72 Rule Arg 1932 1940 - Mar 1 0:00 0 -
73 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
74 Rule Arg 1940 only - Jul 1 0:00 1:00 S
75 Rule Arg 1941 only - Jun 15 0:00 0 -
76 Rule Arg 1941 only - Oct 15 0:00 1:00 S
77 Rule Arg 1943 only - Aug 1 0:00 0 -
78 Rule Arg 1943 only - Oct 15 0:00 1:00 S
79 Rule Arg 1946 only - Mar 1 0:00 0 -
80 Rule Arg 1946 only - Oct 1 0:00 1:00 S
81 Rule Arg 1963 only - Oct 1 0:00 0 -
82 Rule Arg 1963 only - Dec 15 0:00 1:00 S
83 Rule Arg 1964 1966 - Mar 1 0:00 0 -
84 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
85 Rule Arg 1967 only - Apr 2 0:00 0 -
86 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
87 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
88 Rule Arg 1974 only - Jan 23 0:00 1:00 S
89 Rule Arg 1974 only - May 1 0:00 0 -
90 Rule Arg 1988 only - Dec 1 0:00 1:00 S
92 # From Hernan G. Otero (1995-06-26):
93 # These corrections were contributed by InterSoft Argentina S.A.,
94 # obtaining the data from the:
95 # Talleres de Hidrografia Naval Argentina
96 # (Argentine Naval Hydrography Institute)
97 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
98 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
100 # From Hernan G. Otero (1995-06-26):
101 # From this moment on, the law that mandated the daylight saving
102 # time corrections was derogated and no more modifications
103 # to the time zones (for daylight saving) are now made.
105 # From Rives McDow (2000-01-10):
106 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
107 # which did not result in the switch of a time zone, as they stayed 9 hours
108 # from the International Date Line.
109 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
110 # From Paul Eggert (2007-12-28):
111 # DST was set to expire on March 5, not March 3, but since it was converted
112 # to standard time on March 3 it's more convenient for us to pretend that
113 # it ended on March 3.
114 Rule Arg 2000 only - Mar 3 0:00 0 -
116 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
117 # We just checked with our Sao Paulo office and they say the government of
118 # Argentina decided not to become one of the countries that go on or off DST.
119 # So Buenos Aires should be -3 hours from GMT at all times.
121 # From Fabian L. Arce Jofre (2000-04-04):
122 # The law that claimed DST for Argentina was derogated by President Fernando
123 # de la Rua on March 2, 2000, because it would make people spend more energy
124 # in the winter time, rather than less. The change took effect on March 3.
126 # From Mariano Absatz (2001-06-06):
127 # one of the major newspapers here in Argentina said that the 1999
128 # Timezone Law (which never was effectively applied) will (would?) be
129 # in effect.... The article is at
130 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
131 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
132 # 1999-09-17, and published 1999-09-21. The official publication is at:
133 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
134 # Regretfully, you have to subscribe (and pay) for the on-line version....
137 # the timezone for Argentina will not change next Sunday.
138 # Apparently it will do so on Sunday 24th....
139 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
142 # Last Friday (yes, the last working day before the date of the change), the
143 # Senate annulled the 1999 law that introduced the changes later postponed.
144 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
145 # It remains the vote of the Deputies..., but it will be the same....
146 # This kind of things had always been done this way in Argentina.
147 # We are still -03:00 all year round in all of the country.
149 # From Steffen Thorsen (2007-12-21):
150 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
151 # all of the country (all Zone-entries) are affected. News reports like
152 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
153 # that Argentina will use DST next year as well, from October to
154 # March, although exact rules are not given.
156 # From Jesper Norgaard Welen (2007-12-26)
157 # The last hurdle of Argentina DST is over, the proposal was approved in
158 # the lower chamber too (Deputados) with a vote 192 for and 2 against.
159 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
160 # the original scanned proposal, where the dates and the zero hours are
161 # clear and unambiguous...This is the article about final approval:
162 # <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
163 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
166 # From Paul Eggert (2007-12-22):
167 # For dates after mid-2008, the following rules are my guesses and
168 # are quite possibly wrong, but are more likely than no DST at all.
170 # From Alexander Krivenyshev (2008-09-05):
171 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
172 # Argentina will start DST on Sunday October 19, 2008.
174 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
175 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
178 # <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
179 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
182 # From Rodrigo Severo (2008-10-06):
183 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
185 # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
186 # Hi, there is a problem with timezone-data-2008e and maybe with
187 # timezone-data-2008f
188 # Argentinian law [Number] 25.155 is no longer valid.
189 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
190 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
192 # The new one is law [Number] 26.350
193 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
194 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
196 # So there is no summer time in Argentina for now.
198 # From Mariano Absatz (2008-10-20):
199 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
200 # From 2008-10-19 until 2009-03-15
201 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
202 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
205 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
206 # Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
207 # and Tierra del Fuego
208 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
209 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
212 # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
213 # it will not apply DST either (even when it was not included in Decree 1705/2008)
214 # <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
215 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
218 Rule Arg 2007 only - Dec 30 0:00 1:00 S
219 Rule Arg 2008 max - Mar Sun>=15 0:00 0 -
220 Rule Arg 2008 max - Oct Sun>=15 0:00 1:00 S
222 # From Mariano Absatz (2004-05-21):
223 # Today it was officially published that the Province of Mendoza is changing
224 # its timezone this winter... starting tomorrow night....
225 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
226 # From Paul Eggert (2004-05-24):
227 # It's Law No. 7,210. This change is due to a public power emergency, so for
228 # now we'll assume it's for this year only.
230 # From Paul Eggert (2006-03-22):
231 # <a href="http://www.spicasc.net/horvera.html">
232 # Hora de verano para la Republica Argentina (2003-06-08)
233 # </a> says that standard time in Argentina from 1894-10-31
234 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
235 # over Shanks & Pottenger.
237 # From Mariano Absatz (2004-06-05):
238 # These media articles from a major newspaper mostly cover the current state:
239 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
240 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
242 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
243 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
244 # Apparently, all nine provinces would go back to UTC-03:00 at the same
245 # time in October 17th.
247 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
248 # Tierra del Fuego, Tucuman.
250 # From Mariano Absatz (2004-06-14):
251 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
252 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
253 # annoyance with the change is much higher than the power savings obtained....
255 # From Gwillim Law (2004-06-14):
256 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
257 # "The time change in Tierra del Fuego was a conflicted decision from
258 # the start. The government had decreed that the measure would take
259 # effect on June 1, but a normative error forced the new time to begin
260 # three days earlier, from a Saturday to a Sunday....
261 # Our understanding was that the change was originally scheduled to take place
262 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
263 # provinces). Sunday was May 30, only two days earlier. So the article
264 # contains a contradiction. I would give more credence to the Saturday/Sunday
265 # date than the "three days earlier" phrase, and conclude that Tierra del
266 # Fuego set its clocks back at 2004-05-30 00:00.
268 # From Steffen Thorsen (2004-10-05):
269 # The previous law 7210 which changed the province of Mendoza's time zone
270 # back in May have been modified slightly in a new law 7277, which set the
271 # new end date to 2004-09-26 (original date was 2004-10-17).
272 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
274 # From Mariano Absatz (2004-10-05):
275 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
276 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
277 # at midnight between Saturday, July 24th and Sunday, July 25th....
278 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
279 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
280 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
282 # From Alex Krivenyshev (2008-01-17):
283 # Here are articles that Argentina Province San Luis is planning to end DST
284 # as earlier as upcoming Monday January 21, 2008 or February 2008:
286 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
287 # (Argentine Province delayed clock and mark difference with the rest of the
289 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
290 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
293 # Es inminente que en San Luis atrasen una hora los relojes
294 # (It is imminent in San Luis clocks one hour delay)
295 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
296 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
299 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
300 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
303 # From Jesper Norgaard Welen (2008-01-18):
304 # The page of the San Luis provincial government
305 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
306 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
308 # confirms what Alex Krivenyshev has earlier sent to the tz
309 # emailing list about that San Luis plans to return to standard
310 # time much earlier than the rest of the country. It also
311 # confirms that upon request the provinces San Juan and Mendoza
312 # refused to follow San Luis in this change.
314 # The change is supposed to take place Monday the 21.st at 0:00
315 # hours. As far as I understand it if this goes ahead, we need
316 # a new timezone for San Luis (although there are also documented
317 # independent changes in the southamerica file of San Luis in
318 # 1990 and 1991 which has not been confirmed).
320 # From Jesper Norgaard Welen (2008-01-25):
321 # Unfortunately the below page has become defunct, about the San Luis
322 # time change. Perhaps because it now is part of a group of pages "Most
323 # important pages of 2008."
326 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
327 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
329 # instead it seems. Or use "Buscador" from the main page of the San Luis
330 # government, and fill in "huso" and click OK, and you will get 3 pages
331 # from which the first one is identical to the above.
333 # From Mariano Absatz (2008-01-28):
334 # I can confirm that the Province of San Luis (and so far only that
335 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
336 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
337 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
338 # (that is, unless they change their mind any minute now).
340 # So we'll have to add yet another city to 'southamerica' (I think San
341 # Luis city is the mos populated city in the Province, so it'd be
342 # America/Argentina/San_Luis... of course I can't remember if San Luis's
343 # history of particular changes goes along with Mendoza or San Juan :-(
344 # (I only remember not being able to collect hard facts about San Luis
345 # back in 2004, when these provinces changed to UTC-4 for a few days, I
346 # mailed them personally and never got an answer).
348 # From Paul Eggert (2008-06-30):
349 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
350 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
351 # America/Cordoba split into 6 subregions during 1991/1992, one of which
352 # was America/San_Luis, but we haven't verified this yet so for now we'll
353 # keep America/Cordoba a single region rather than splitting it into the
354 # other 5 subregions.
356 # From Mariano Absatz (2009-03-13):
357 # Yesterday (with our usual 2-day notice) the Province of San Luis
358 # decided that next Sunday instead of "staying" @utc-03:00 they will go
359 # to utc-04:00 until the second Saturday in October...
361 # The press release is at
362 # <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102">
363 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
365 # (I couldn't find the decree, but
366 # <a href="http://www.sanluis.gov.ar">
369 # is the official page for the Province Government).
371 # There's also a note in only one of the major national papers (La Nación) at
372 # <a href="http://www.lanacion.com.ar/nota.asp?nota_id=1107912">
373 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
376 # The press release says:
377 # (...) anunció que el próximo domingo a las 00:00 los puntanos deberán
378 # atrasar una hora sus relojes.
380 # A partir de entonces, San Luis establecerá el huso horario propio de
381 # la Provincia. De esta manera, durante el periodo del calendario anual
382 # 2009, el cambio horario quedará comprendido entre las 00:00 del tercer
383 # domingo de marzo y las 24:00 del segundo sábado de octubre.
384 # Quick&dirty translation
385 # (...) announced that next Sunday, at 00:00, Puntanos (the San Luis
386 # inhabitants) will have to turn back one hour their clocks
388 # Since then, San Luis will establish its own Province timezone. Thus,
389 # during 2009, this timezone change will run from 00:00 the third Sunday
390 # in March until 24:00 of the second Saturday in October.
392 # From Arthur David Olson (2009-03-16):
393 # The unofficial claim at
394 # <a href="http://www.timeanddate.com/news/time/san-luis-new-time-zone.html">
395 # http://www.timeanddate.com/news/time/san-luis-new-time-zone.html
397 # is that "The province will most likely follow the next daylight saving schedule,
398 # which is planned for the second Sunday in October."
401 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
403 # Buenos Aires (BA), Capital Federal (CF),
404 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
405 -4:16:48 - CMT 1920 May # Cordoba Mean Time
407 -4:00 Arg AR%sT 1969 Oct 5
408 -3:00 Arg AR%sT 1999 Oct 3
409 -4:00 Arg AR%sT 2000 Mar 3
412 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
413 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
415 # Shanks & Pottenger also make the following claims, which we haven't verified:
416 # - Formosa switched to -3:00 on 1991-01-07.
417 # - Misiones switched to -3:00 on 1990-12-29.
418 # - Chaco switched to -3:00 on 1991-01-04.
419 # - Santiago del Estero switched to -4:00 on 1991-04-01,
420 # then to -3:00 on 1991-04-26.
422 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
423 -4:16:48 - CMT 1920 May
425 -4:00 Arg AR%sT 1969 Oct 5
426 -3:00 Arg AR%sT 1991 Mar 3
427 -4:00 - WART 1991 Oct 20
428 -3:00 Arg AR%sT 1999 Oct 3
429 -4:00 Arg AR%sT 2000 Mar 3
432 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
433 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
434 -4:16:48 - CMT 1920 May
436 -4:00 Arg AR%sT 1969 Oct 5
437 -3:00 Arg AR%sT 1991 Mar 3
438 -4:00 - WART 1991 Oct 20
439 -3:00 Arg AR%sT 1999 Oct 3
440 -4:00 Arg AR%sT 2000 Mar 3
441 -3:00 Arg AR%sT 2008 Oct 18
445 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
446 -4:16:48 - CMT 1920 May
448 -4:00 Arg AR%sT 1969 Oct 5
449 -3:00 Arg AR%sT 1991 Mar 3
450 -4:00 - WART 1991 Oct 20
451 -3:00 Arg AR%sT 1999 Oct 3
452 -4:00 Arg AR%sT 2000 Mar 3
453 -3:00 - ART 2004 Jun 1
454 -4:00 - WART 2004 Jun 13
458 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
459 -4:16:48 - CMT 1920 May
461 -4:00 Arg AR%sT 1969 Oct 5
462 -3:00 Arg AR%sT 1991 Mar 1
463 -4:00 - WART 1991 May 7
464 -3:00 Arg AR%sT 1999 Oct 3
465 -4:00 Arg AR%sT 2000 Mar 3
466 -3:00 - ART 2004 Jun 1
467 -4:00 - WART 2004 Jun 20
468 -3:00 Arg AR%sT 2008 Oct 18
472 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
473 -4:16:48 - CMT 1920 May
475 -4:00 Arg AR%sT 1969 Oct 5
476 -3:00 Arg AR%sT 1991 Mar 1
477 -4:00 - WART 1991 May 7
478 -3:00 Arg AR%sT 1999 Oct 3
479 -4:00 Arg AR%sT 2000 Mar 3
480 -3:00 - ART 2004 May 31
481 -4:00 - WART 2004 Jul 25
482 -3:00 Arg AR%sT 2008 Oct 18
486 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
487 -4:16:48 - CMT 1920 May
489 -4:00 Arg AR%sT 1969 Oct 5
490 -3:00 Arg AR%sT 1990 Mar 4
491 -4:00 - WART 1990 Oct 28
492 -4:00 1:00 WARST 1991 Mar 17
493 -4:00 - WART 1991 Oct 6
495 -3:00 Arg AR%sT 1999 Oct 3
496 -4:00 Arg AR%sT 2000 Mar 3
497 -3:00 Arg AR%sT 2008 Oct 18
500 # Catamarca (CT), Chubut (CH)
501 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
502 -4:16:48 - CMT 1920 May
504 -4:00 Arg AR%sT 1969 Oct 5
505 -3:00 Arg AR%sT 1991 Mar 3
506 -4:00 - WART 1991 Oct 20
507 -3:00 Arg AR%sT 1999 Oct 3
508 -4:00 Arg AR%sT 2000 Mar 3
509 -3:00 - ART 2004 Jun 1
510 -4:00 - WART 2004 Jun 20
511 -3:00 Arg AR%sT 2008 Oct 18
515 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
516 -4:16:48 - CMT 1920 May
518 -4:00 Arg AR%sT 1969 Oct 5
519 -3:00 Arg AR%sT 1990 Mar 4
520 -4:00 - WART 1990 Oct 15
521 -4:00 1:00 WARST 1991 Mar 1
522 -4:00 - WART 1991 Oct 15
523 -4:00 1:00 WARST 1992 Mar 1
524 -4:00 - WART 1992 Oct 18
525 -3:00 Arg AR%sT 1999 Oct 3
526 -4:00 Arg AR%sT 2000 Mar 3
527 -3:00 - ART 2004 May 23
528 -4:00 - WART 2004 Sep 26
529 -3:00 Arg AR%sT 2008 Oct 18
533 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
534 -4:16:48 - CMT 1920 May
536 -4:00 Arg AR%sT 1969 Oct 5
538 -3:00 1:00 ARST 1990 Mar 14
539 -4:00 - WART 1990 Oct 15
540 -4:00 1:00 WARST 1991 Mar 1
541 -4:00 - WART 1991 Jun 1
542 -3:00 - ART 1999 Oct 3
543 -4:00 1:00 WARST 2000 Mar 3
544 -3:00 - ART 2004 May 31
545 -4:00 - WART 2004 Jul 25
546 -3:00 Arg AR%sT 2008 Jan 21
547 -3:00 - ART 2009 Mar 15
551 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
552 -4:16:48 - CMT 1920 May # Cordoba Mean Time
554 -4:00 Arg AR%sT 1969 Oct 5
555 -3:00 Arg AR%sT 1999 Oct 3
556 -4:00 Arg AR%sT 2000 Mar 3
557 -3:00 - ART 2004 Jun 1
558 -4:00 - WART 2004 Jun 20
559 -3:00 Arg AR%sT 2008 Oct 18
562 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
563 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
564 -4:16:48 - CMT 1920 May # Cordoba Mean Time
566 -4:00 Arg AR%sT 1969 Oct 5
567 -3:00 Arg AR%sT 1999 Oct 3
568 -4:00 Arg AR%sT 2000 Mar 3
569 -3:00 - ART 2004 May 30
570 -4:00 - WART 2004 Jun 20
571 -3:00 Arg AR%sT 2008 Oct 18
575 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
576 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
577 -4:30 - ANT 1965 # Netherlands Antilles Time
581 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
582 Zone America/La_Paz -4:32:36 - LMT 1890
583 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
584 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
585 -4:00 - BOT # Bolivia Time
589 # From Paul Eggert (1993-11-18):
590 # The mayor of Rio recently attempted to change the time zone rules
591 # just in his city, in order to leave more summer time for the tourist trade.
592 # The rule change lasted only part of the day;
593 # the federal government refused to follow the city's rules, and business
594 # was in a chaos, so the mayor backed down that afternoon.
596 # From IATA SSIM (1996-02):
597 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
598 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
599 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
600 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
601 # [The last three states are new to this issue of the IATA SSIM.]
603 # From Gwillim Law (1996-10-07):
604 # Geography, history (Tocantins was part of Goias until 1989), and other
605 # sources of time zone information lead me to believe that AL, SE, and TO were
606 # always in BR1, and so the only change was whether or not they observed DST....
607 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
608 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
609 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
610 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
611 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
612 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
613 # become part of the state of Pernambuco). The boundary between BR1 and BR2
614 # has never been clearly stated. They've simply been called East and West.
615 # However, some conclusions can be drawn from another IATA manual: the Airline
616 # Coding Directory, which lists close to 400 airports in Brazil. For each
617 # airport it gives a time zone which is coded to the SSIM. From that
618 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
619 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
620 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
622 # From Marcos Tadeu (1998-09-27):
623 # <a href="http://pcdsh01.on.br/verao1.html">
624 # Brazilian official page
627 # From Jesper Norgaard (2000-11-03):
628 # [For an official list of which regions in Brazil use which time zones, see:]
629 # http://pcdsh01.on.br/Fusbr.htm
630 # http://pcdsh01.on.br/Fusbrhv.htm
632 # From Celso Doria via David Madeo (2002-10-09):
633 # The reason for the delay this year has to do with elections in Brazil.
635 # Unlike in the United States, elections in Brazil are 100% computerized and
636 # the results are known almost immediately. Yesterday, it was the first
637 # round of the elections when 115 million Brazilians voted for President,
638 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
639 # counting (or re-counting) votes anymore and we know there will be a second
640 # round for the Presidency and also for some Governors. The 2nd round will
641 # take place on October 27th.
643 # The reason why the DST will only begin November 3rd is that the thousands
644 # of electoral machines used cannot have their time changed, and since the
645 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
646 # the Government decided to postpone DST, instead of changing the Constitution
647 # (maybe, for the next elections, it will be possible to change the clock)...
649 # From Rodrigo Severo (2004-10-04):
650 # It's just the biannual change made necessary by the much hyped, supposedly
651 # modern Brazilian eletronic voting machines which, apparently, can't deal
652 # with a time change between the first and the second rounds of the elections.
654 # From Steffen Thorsen (2007-09-20):
655 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
656 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
658 # From Paul Schulze (2008-06-24):
659 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
660 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
661 # effective today (00:00am at June 24, 2008) as follows:
663 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
664 # part of the Amazonas state that had this timezone now being put to the
666 # b) The whole Para state now is put at timezone UTC+3, instead of just
667 # part of it, as was before.
669 # This change follows a proposal of senator Tiao Viana of Acre state, that
670 # proposed it due to concerns about open television channels displaying
671 # programs inappropriate to youths in the states that had the timezone
672 # UTC+5 too early in the night. In the occasion, some more corrections
673 # were proposed, trying to unify the timezones of any given state. This
674 # change modifies timezone rules defined in decree 2.784 of 18 June,
677 # From Rodrigo Severo (2008-06-24):
678 # Just correcting the URL:
679 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
680 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
683 # As a result of the above Decree I believe the America/Rio_Branco
684 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
685 # be created to represent the the west side of the Para State. I
686 # suggest this new timezone be called Santarem as the most
687 # important/populated city in the affected area.
689 # This new timezone would be the same as the Rio_Branco timezone up to
690 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
692 # From Alex Krivenyshev (2008-06-24):
693 # This is a quick reference page for New and Old Brazil Time Zones map.
694 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
695 # http://www.worldtimezone.com/brazil-time-new-old.php
698 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
699 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
700 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
702 # From Paul Eggert (2002-10-10):
703 # The official decrees referenced below are mostly taken from
704 # <a href="http://pcdsh01.on.br/DecHV.html">
705 # Decretos sobre o Horario de Verao no Brasil
708 # From Steffen Thorsen (2008-08-29):
709 # As announced by the government and many newspapers in Brazil late
710 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
711 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
712 # past years experience with the elections, there was a good chance that
713 # the start was postponed to November, but it did not happen this year.
715 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
717 # An official page about it:
718 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
719 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
721 # Note that this link does not always work directly, but must be accessed
723 # <a href="http://www.mme.gov.br/first">
724 # http://www.mme.gov.br/first
727 # One example link that works directly:
728 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
729 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
733 # We have a written a short article about it as well:
734 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
735 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
738 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
739 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
740 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
741 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
742 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
743 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
744 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
746 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
747 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
748 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
749 Rule Brazil 1950 only - Apr 16 1:00 0 -
750 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
751 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
752 Rule Brazil 1953 only - Mar 1 0:00 0 -
753 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
755 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
756 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
757 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
758 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
759 # extended the above decree to all of the national territory on 12-09.
760 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
761 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
762 # extended summer time by one day to 1964-03-01 00:00 (start of school).
763 Rule Brazil 1964 only - Mar 1 0:00 0 -
764 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
765 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
766 Rule Brazil 1965 only - Mar 31 0:00 0 -
767 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
768 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
769 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
770 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
771 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
772 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
774 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
775 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
776 # Decree 92,310 (1986-01-21)
777 # Decree 92,463 (1986-03-13)
778 Rule Brazil 1986 only - Mar 15 0:00 0 -
779 # Decree 93,316 (1986-10-01)
780 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
781 Rule Brazil 1987 only - Feb 14 0:00 0 -
782 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
783 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
784 Rule Brazil 1988 only - Feb 7 0:00 0 -
785 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
786 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
787 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
788 Rule Brazil 1989 only - Jan 29 0:00 0 -
789 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
790 # with the same exceptions
791 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
792 Rule Brazil 1990 only - Feb 11 0:00 0 -
793 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
794 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
795 # Decree 99,629 (1990-10-19) adds BA, MT.
796 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
797 Rule Brazil 1991 only - Feb 17 0:00 0 -
798 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
799 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
800 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
801 Rule Brazil 1992 only - Feb 9 0:00 0 -
802 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
803 # adopted by same states.
804 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
805 Rule Brazil 1993 only - Jan 31 0:00 0 -
806 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
807 # adopted by same states, plus AM.
808 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
809 # web page corrected 2004-01-07) adopted by same states, minus AM.
810 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
811 # adopted by same states, plus MT and TO.
812 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
814 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
815 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
816 Rule Brazil 1996 only - Feb 11 0:00 0 -
817 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
818 # adopted by same states, minus AL, SE.
819 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
820 Rule Brazil 1997 only - Feb 16 0:00 0 -
821 # From Daniel C. Sobral (1998-02-12):
822 # In 1997, the DS began on October 6. The stated reason was that
823 # because international television networks ignored Brazil's policy on DS,
824 # they bought the wrong times on satellite for coverage of Pope's visit.
825 # This year, the ending date of DS was postponed to March 1
826 # to help dealing with the shortages of electric power.
828 # Decree 2,317 (1997-09-04), adopted by same states.
829 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
830 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
832 Rule Brazil 1998 only - Mar 1 0:00 0 -
833 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
834 # adopted by the same states as before.
835 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
836 Rule Brazil 1999 only - Feb 21 0:00 0 -
837 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
838 # (1999-08-23) adopted by same states.
839 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
840 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
841 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
842 Rule Brazil 2000 only - Feb 27 0:00 0 -
843 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
844 # adopted by the same states as before.
845 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
846 # repeals DST in PE and RR, effective 2000-10-15 00:00.
847 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
848 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
849 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
850 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
851 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
852 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
853 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
854 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
855 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
856 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
857 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
858 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
859 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
860 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
861 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
862 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
863 # adopted by the same states as before.
864 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
865 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
866 # adopted by the same states as before.
867 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
868 Rule Brazil 2007 only - Feb 25 0:00 0 -
869 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
870 # adopted by the same states as before.
871 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
872 # From Frederico A. C. Neves (2008-09-10):
873 # Acording to this decree
874 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
875 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
877 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
878 # 3rd Feb Sunday. There is an exception on the return date when this is
879 # the Carnival Sunday then the return date will be the next Sunday...
880 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
881 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
882 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
883 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
884 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
885 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
886 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
887 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
888 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
889 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
890 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
891 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
892 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
893 # From Arthur David Olson (2008-09-29):
894 # The next is wrong in some years but is better than nothing.
895 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
897 # The latest ruleset listed above says that the following states observe DST:
898 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
900 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
902 # Fernando de Noronha (administratively part of PE)
903 Zone America/Noronha -2:09:40 - LMT 1914
904 -2:00 Brazil FN%sT 1990 Sep 17
905 -2:00 - FNT 1999 Sep 30
906 -2:00 Brazil FN%sT 2000 Oct 15
907 -2:00 - FNT 2001 Sep 13
908 -2:00 Brazil FN%sT 2002 Oct 1
910 # Other Atlantic islands have no permanent settlement.
911 # These include Trindade and Martin Vaz (administratively part of ES),
912 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
913 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
914 # it also included the Penedos.
916 # Amapa (AP), east Para (PA)
917 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
918 # The division between east and west Para is the river Xingu.
919 # In the north a very small part from the river Javary (now Jari I guess,
920 # the border with Amapa) to the Amazon, then to the Xingu.
921 Zone America/Belem -3:13:56 - LMT 1914
922 -3:00 Brazil BR%sT 1988 Sep 12
926 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
927 Zone America/Santarem -3:38:48 - LMT 1914
928 -4:00 Brazil AM%sT 1988 Sep 12
929 -4:00 - AMT 2008 Jun 24 00:00
932 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
934 Zone America/Fortaleza -2:34:00 - LMT 1914
935 -3:00 Brazil BR%sT 1990 Sep 17
936 -3:00 - BRT 1999 Sep 30
937 -3:00 Brazil BR%sT 2000 Oct 22
938 -3:00 - BRT 2001 Sep 13
939 -3:00 Brazil BR%sT 2002 Oct 1
942 # Pernambuco (PE) (except Atlantic islands)
943 Zone America/Recife -2:19:36 - LMT 1914
944 -3:00 Brazil BR%sT 1990 Sep 17
945 -3:00 - BRT 1999 Sep 30
946 -3:00 Brazil BR%sT 2000 Oct 15
947 -3:00 - BRT 2001 Sep 13
948 -3:00 Brazil BR%sT 2002 Oct 1
952 Zone America/Araguaina -3:12:48 - LMT 1914
953 -3:00 Brazil BR%sT 1990 Sep 17
954 -3:00 - BRT 1995 Sep 14
955 -3:00 Brazil BR%sT 2003 Sep 24
958 # Alagoas (AL), Sergipe (SE)
959 Zone America/Maceio -2:22:52 - LMT 1914
960 -3:00 Brazil BR%sT 1990 Sep 17
961 -3:00 - BRT 1995 Oct 13
962 -3:00 Brazil BR%sT 1996 Sep 4
963 -3:00 - BRT 1999 Sep 30
964 -3:00 Brazil BR%sT 2000 Oct 22
965 -3:00 - BRT 2001 Sep 13
966 -3:00 Brazil BR%sT 2002 Oct 1
970 # There are too many Salvadors elsewhere, so use America/Bahia instead
971 # of America/Salvador.
972 Zone America/Bahia -2:34:04 - LMT 1914
973 -3:00 Brazil BR%sT 2003 Sep 24
976 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
977 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
978 # Santa Catarina (SC), Rio Grande do Sul (RS)
979 Zone America/Sao_Paulo -3:06:28 - LMT 1914
980 -3:00 Brazil BR%sT 1963 Oct 23 00:00
984 # Mato Grosso do Sul (MS)
985 Zone America/Campo_Grande -3:38:28 - LMT 1914
989 Zone America/Cuiaba -3:44:20 - LMT 1914
990 -4:00 Brazil AM%sT 2003 Sep 24
991 -4:00 - AMT 2004 Oct 1
995 Zone America/Porto_Velho -4:15:36 - LMT 1914
996 -4:00 Brazil AM%sT 1988 Sep 12
1000 Zone America/Boa_Vista -4:02:40 - LMT 1914
1001 -4:00 Brazil AM%sT 1988 Sep 12
1002 -4:00 - AMT 1999 Sep 30
1003 -4:00 Brazil AM%sT 2000 Oct 15
1006 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1007 # The great circle line from Tabatinga to Porto Acre divides
1008 # east from west Amazonas.
1009 Zone America/Manaus -4:00:04 - LMT 1914
1010 -4:00 Brazil AM%sT 1988 Sep 12
1011 -4:00 - AMT 1993 Sep 28
1012 -4:00 Brazil AM%sT 1994 Sep 22
1015 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1016 # Eirunepe, Envira, Ipixuna
1017 Zone America/Eirunepe -4:39:28 - LMT 1914
1018 -5:00 Brazil AC%sT 1988 Sep 12
1019 -5:00 - ACT 1993 Sep 28
1020 -5:00 Brazil AC%sT 1994 Sep 22
1021 -5:00 - ACT 2008 Jun 24 00:00
1025 Zone America/Rio_Branco -4:31:12 - LMT 1914
1026 -5:00 Brazil AC%sT 1988 Sep 12
1027 -5:00 - ACT 2008 Jun 24 00:00
1032 # From Eduardo Krell (1995-10-19):
1033 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1034 # of October.... The law is the same for March and October.
1036 # Because of the drought this year, the government decided to go into
1037 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1038 # (unless there's another dry season next year, I guess).
1040 # From Julio I. Pacheco Troncoso (1999-03-18):
1041 # Because of the same drought, the government decided to end DST later,
1042 # on April 3, (one-time change).
1044 # From Oscar van Vlijmen (2006-10-08):
1045 # http://www.horaoficial.cl/cambio.htm
1047 # From Jesper Norgaard Welen (2006-10-08):
1048 # I think that there are some obvious mistakes in the suggested link
1049 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1050 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1051 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1052 # anyhow it clears up some doubts too.
1054 # From Paul Eggert (2006-12-27):
1055 # The following data for Chile and America/Santiago are from
1056 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1057 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1058 # & Pottenger, except with DST transitions after 1932 cloned from
1059 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1060 # but we have no other source.
1062 # From German Poo-Caaman~o (2008-03-03):
1063 # Due to drought, Chile extends Daylight Time in three weeks. This
1064 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1065 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1066 # The Supreme Decree is located at
1067 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1068 # http://www.shoa.cl/servicios/supremo316.pdf
1070 # and the instructions for 2008 are located in:
1071 # <a href="http://www.horaoficial.cl/cambio.htm">
1072 # http://www.horaoficial.cl/cambio.htm
1075 # From Jose Miguel Garrido (2008-03-05):
1077 # You could see the announces of the change on
1078 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1079 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1082 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1083 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1084 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1085 Rule Chile 1942 only - Jun 1 4:00u 0 -
1086 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1087 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1088 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1089 Rule Chile 1947 only - Apr 1 4:00u 0 -
1090 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1091 Rule Chile 1969 only - Mar 30 3:00u 0 -
1092 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1093 Rule Chile 1970 only - Mar 29 3:00u 0 -
1094 Rule Chile 1971 only - Mar 14 3:00u 0 -
1095 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1096 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1097 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1098 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1099 Rule Chile 1987 only - Apr 12 3:00u 0 -
1100 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1101 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1102 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1103 Rule Chile 1990 only - Mar 18 3:00u 0 -
1104 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1105 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1106 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1107 Rule Chile 1997 only - Mar 30 3:00u 0 -
1108 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1109 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1110 Rule Chile 1999 only - Apr 4 3:00u 0 -
1111 Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
1112 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1113 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1114 # which is used below in specifying the transition.
1115 Rule Chile 2008 only - Mar 30 3:00u 0 -
1116 Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
1117 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1118 # (1996-09) says 1998-03-08. Ignore these.
1119 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1120 Zone America/Santiago -4:42:46 - LMT 1890
1121 -4:42:46 - SMT 1910 # Santiago Mean Time
1122 -5:00 - CLT 1916 Jul 1 # Chile Time
1123 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1124 -4:00 - CLT 1919 Jul 1 # Chile Time
1125 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1126 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1128 Zone Pacific/Easter -7:17:44 - LMT 1890
1129 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1130 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1133 # Sala y Gomez Island is like Pacific/Easter.
1134 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1135 # San Felix, and Antarctic bases, are like America/Santiago.
1138 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1139 Rule CO 1992 only - May 3 0:00 1:00 S
1140 Rule CO 1993 only - Apr 4 0:00 0 -
1141 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1142 Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1143 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1144 -5:00 CO CO%sT # Colombia Time
1145 # Malpelo, Providencia, San Andres
1146 # no information; probably like America/Bogota
1150 # From Paul Eggert (2006-03-22):
1151 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1152 # -4:00 since standard time was introduced on 1912-03-02; and that
1153 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1154 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1155 # Saba Island has been like Curacao.
1156 # This all predates our 1970 cutoff, though.
1158 # By July 2007 Curacao and St Maarten are planned to become
1159 # associated states within the Netherlands, much like Aruba;
1160 # Bonaire, Saba and St Eustatius would become directly part of the
1161 # Netherlands as Kingdom Islands. This won't affect their time zones
1162 # though, as far as we know.
1164 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1165 Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1166 -4:30 - ANT 1965 # Netherlands Antilles Time
1171 # From Paul Eggert (2007-03-04):
1172 # Apparently Ecuador had a failed experiment with DST in 1992.
1173 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1174 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1175 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1177 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1178 Zone America/Guayaquil -5:19:20 - LMT 1890
1179 -5:14:00 - QMT 1931 # Quito Mean Time
1180 -5:00 - ECT # Ecuador Time
1181 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1183 -6:00 - GALT # Galapagos Time
1187 # From Paul Eggert (2006-03-22):
1188 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1189 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1191 # From Falkland Islands Government Office, London (2001-01-22)
1192 # via Jesper Norgaard:
1193 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1194 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1195 # September. It is anticipated that the clocks will revert back at 2
1196 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1197 # Sunday 1 September.
1199 # From Rives McDow (2001-02-13):
1201 # I have communicated several times with people there, and the last
1202 # time I had communications that was helpful was in 1998. Here is
1203 # what was said then:
1205 # "The general rule was that Stanley used daylight saving and the Camp
1206 # did not. However for various reasons many people in the Camp have
1207 # started to use daylight saving (known locally as 'Stanley Time')
1208 # There is no rule as to who uses daylight saving - it is a matter of
1209 # personal choice and so it is impossible to draw a map showing who
1210 # uses it and who does not. Any list would be out of date as soon as
1211 # it was produced. This year daylight saving ended on April 18/19th
1212 # and started again on September 12/13th. I do not know what the rule
1213 # is, but can find out if you like. We do not change at the same time
1216 # I did have in my notes that the rule was "Second Saturday in Sep at
1217 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1218 # not agree in some cases with Shanks; is this true?
1220 # Also, there is no mention in the list that some areas in the
1221 # Falklands do not use DST. I have found in my communications there
1222 # that these areas are on the western half of East Falkland and all of
1223 # West Falkland. Stanley is the only place that consistently observes
1224 # DST. Again, as in other places in the world, the farmers don't like
1225 # it. West Falkland is almost entirely sheep farmers.
1227 # I know one lady there that keeps a list of which farm keeps DST and
1228 # which doesn't each year. She runs a shop in Stanley, and says that
1229 # the list changes each year. She uses it to communicate to her
1230 # customers, catching them when they are home for lunch or dinner.
1232 # From Paul Eggert (2001-03-05):
1233 # For now, we'll just record the time in Stanley, since we have no
1236 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1237 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1238 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1239 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1240 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1241 Rule Falk 1943 only - Jan 1 0:00 0 -
1242 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1243 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1244 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1245 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1246 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1247 Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1248 Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1249 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1250 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1251 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1252 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1253 -3:00 Falk FK%sT 1985 Sep 15
1257 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1258 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1259 -4:00 - GFT 1967 Oct # French Guiana Time
1263 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1264 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1265 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1266 -3:45 - GYT 1975 Jul 31 # Guyana Time
1268 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1272 # From Paul Eggert (2006-03-22):
1273 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1274 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1275 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1276 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1277 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1278 Rule Para 1975 1978 - Mar 1 0:00 0 -
1279 Rule Para 1979 1991 - Apr 1 0:00 0 -
1280 Rule Para 1989 only - Oct 22 0:00 1:00 S
1281 Rule Para 1990 only - Oct 1 0:00 1:00 S
1282 Rule Para 1991 only - Oct 6 0:00 1:00 S
1283 Rule Para 1992 only - Mar 1 0:00 0 -
1284 Rule Para 1992 only - Oct 5 0:00 1:00 S
1285 Rule Para 1993 only - Mar 31 0:00 0 -
1286 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1287 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1288 Rule Para 1996 only - Mar 1 0:00 0 -
1289 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1290 # From Steffen Thorsen (2000-10-02):
1291 # I have three independent reports that Paraguay changed to DST this Sunday
1294 # Translated by Gwillim Law (2001-02-27) from
1295 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1296 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1298 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1299 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1300 # system has been operating for several years. Formerly there was a separate
1301 # decree each year; the new law has the same effect, but permanently. Every
1302 # year, the time will change on the first Sunday of October; likewise, the
1303 # clock will be set back on the first Sunday of March.
1305 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1306 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1307 Rule Para 1997 only - Feb lastSun 0:00 0 -
1308 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1309 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1310 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1311 # From Rives McDow (2002-02-28):
1312 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1313 # dst method to be from the first Sunday in September to the first Sunday in
1315 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1316 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1318 # From Jesper Norgaard Welen (2005-01-02):
1319 # There are several sources that claim that Paraguay made
1320 # a timezone rule change in autumn 2004.
1321 # From Steffen Thorsen (2005-01-05):
1322 # Decree 1,867 (2004-03-05)
1323 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1324 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1325 Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1326 Rule Para 2005 max - Mar Sun>=8 0:00 0 -
1328 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1329 Zone America/Asuncion -3:50:40 - LMT 1890
1330 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1331 -4:00 - PYT 1972 Oct # Paraguay Time
1332 -3:00 - PYT 1974 Apr
1337 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1338 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1339 # When we were in Peru in 1985-1986, they apparently switched over
1340 # sometime between December 29 and January 3 while we were on the Amazon.
1342 # From Paul Eggert (2006-03-22):
1343 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1345 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1346 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1347 Rule Peru 1938 only - Apr 1 0:00 0 -
1348 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1349 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1350 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1351 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1352 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1353 Rule Peru 1990 only - Apr 1 0:00 0 -
1354 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1355 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1356 Rule Peru 1994 only - Apr 1 0:00 0 -
1357 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1358 Zone America/Lima -5:08:12 - LMT 1890
1359 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1360 -5:00 Peru PE%sT # Peru Time
1363 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1364 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1365 -2:00 - GST # South Georgia Time
1368 # uninhabited; scientific personnel have wintered
1371 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1372 Zone America/Paramaribo -3:40:40 - LMT 1911
1373 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1374 -3:40:36 - PMT 1945 Oct # The capital moved?
1375 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1376 -3:30 - SRT 1984 Oct # Suriname Time
1379 # Trinidad and Tobago
1380 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1381 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1385 # From Paul Eggert (1993-11-18):
1386 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1387 # From Shanks & Pottenger:
1388 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1389 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1390 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1391 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1392 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1393 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1394 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1395 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1396 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1397 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1398 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1399 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1400 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1401 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1402 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1403 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1404 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1405 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1406 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1407 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1408 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1409 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1410 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1411 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1412 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1413 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1414 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1415 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1416 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1417 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1418 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1419 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1420 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1421 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1422 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1423 Rule Uruguay 1980 only - May 1 0:00 0 -
1424 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1425 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1426 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1427 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1428 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1429 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1430 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1431 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1432 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1433 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1434 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1435 # From Eduardo Cota (2004-09-20):
1436 # The uruguayan government has decreed a change in the local time....
1437 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1438 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1439 # From Steffen Thorsen (2005-03-11):
1440 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1441 # save energy ... it was postponed two weeks....
1442 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1443 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1444 # From Eduardo Cota (2005-09-27):
1445 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1446 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1447 # 02:00 local time, official time in Uruguay will be at GMT -2.
1448 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1449 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1450 # From Jesper Norgaard Welen (2006-09-06):
1451 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1452 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1453 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1454 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1455 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1456 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1457 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1462 # From John Stainforth (2007-11-28):
1463 # ... the change for Venezuela originally expected for 2007-12-31 has
1464 # been brought forward to 2007-12-09. The official announcement was
1465 # published today in the "Gaceta Oficial de la Republica Bolivariana
1466 # de Venezuela, numero 38.819" (official document for all laws or
1467 # resolution publication)
1468 # http://www.globovision.com/news.php?nid=72208
1470 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1471 Zone America/Caracas -4:27:44 - LMT 1890
1472 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1473 -4:30 - VET 1965 # Venezuela Time
1474 -4:00 - VET 2007 Dec 9 03:00
projects / thirdparty / glibc.git / blob