2 # This file is in the public domain, so clarified as of
3 # 2009-05-17 by Arthur David Olson.
5 # This data is by no means authoritative; if you think you know better,
6 # go ahead and edit the file (and please send any changes to
7 # tz@iana.org for general use in the future).
9 # From Paul Eggert (2006-03-22):
10 # A good source for time zone historical data outside the U.S. is
11 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
12 # San Diego: ACS Publications, Inc. (2003).
14 # For data circa 1899, a common source is:
15 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
16 # <http://www.jstor.org/stable/1774359>.
18 # Gwillim Law writes that a good source
19 # for recent time zone data is the International Air Transport
20 # Association's Standard Schedules Information Manual (IATA SSIM),
21 # published semiannually. Law sent in several helpful summaries
22 # of the IATA's data after 1990.
24 # Except where otherwise noted, Shanks & Pottenger is the source for
25 # entries through 1990, and IATA SSIM is the source for entries afterwards.
27 # Earlier editions of these tables used the North American style (e.g. ARST and
28 # ARDT for Argentine Standard and Daylight Time), but the following quote
29 # suggests that it's better to use European style (e.g. ART and ARST).
30 # I suggest the use of _Summer time_ instead of the more cumbersome
31 # _daylight-saving time_. _Summer time_ seems to be in general use
32 # in Europe and South America.
33 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
34 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
36 # Earlier editions of these tables also used the North American style
37 # for time zones in Brazil, but this was incorrect, as Brazilians say
38 # "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
39 # the railroad sector, writes (1999-07-06):
40 # The subject of time zones is currently a matter of discussion/debate in
41 # Brazil. Let's say that "the Brasilia time" is considered the
42 # "official time" because Brasilia is the capital city.
43 # The other three time zones are called "Brasilia time "minus one" or
44 # "plus one" or "plus two". As far as I know there is no such
45 # name/designation as "Eastern Time" or "Central Time".
46 # So I invented the following (English-language) abbreviations for now.
47 # Corrections are welcome!
49 # -2:00 FNT FNST Fernando de Noronha
50 # -3:00 BRT BRST Brasilia
51 # -4:00 AMT AMST Amazon
54 ###############################################################################
56 ###############################################################################
60 # From Bob Devine (1988-01-28):
61 # Argentina: first Sunday in October to first Sunday in April since 1976.
62 # Double Summer time from 1969 to 1974. Switches at midnight.
64 # From U. S. Naval Observatory (1988-01-199):
65 # ARGENTINA 3 H BEHIND UTC
67 # From Hernan G. Otero (1995-06-26):
68 # I am sending modifications to the Argentine time zone table...
69 # AR was chosen because they are the ISO letters that represent Argentina.
71 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
72 Rule Arg 1930 only - Dec 1 0:00 1:00 S
73 Rule Arg 1931 only - Apr 1 0:00 0 -
74 Rule Arg 1931 only - Oct 15 0:00 1:00 S
75 Rule Arg 1932 1940 - Mar 1 0:00 0 -
76 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
77 Rule Arg 1940 only - Jul 1 0:00 1:00 S
78 Rule Arg 1941 only - Jun 15 0:00 0 -
79 Rule Arg 1941 only - Oct 15 0:00 1:00 S
80 Rule Arg 1943 only - Aug 1 0:00 0 -
81 Rule Arg 1943 only - Oct 15 0:00 1:00 S
82 Rule Arg 1946 only - Mar 1 0:00 0 -
83 Rule Arg 1946 only - Oct 1 0:00 1:00 S
84 Rule Arg 1963 only - Oct 1 0:00 0 -
85 Rule Arg 1963 only - Dec 15 0:00 1:00 S
86 Rule Arg 1964 1966 - Mar 1 0:00 0 -
87 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
88 Rule Arg 1967 only - Apr 2 0:00 0 -
89 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
90 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
91 Rule Arg 1974 only - Jan 23 0:00 1:00 S
92 Rule Arg 1974 only - May 1 0:00 0 -
93 Rule Arg 1988 only - Dec 1 0:00 1:00 S
95 # From Hernan G. Otero (1995-06-26):
96 # These corrections were contributed by InterSoft Argentina S.A.,
97 # obtaining the data from the:
98 # Talleres de Hidrografia Naval Argentina
99 # (Argentine Naval Hydrography Institute)
100 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
101 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
103 # From Hernan G. Otero (1995-06-26):
104 # From this moment on, the law that mandated the daylight saving
105 # time corrections was derogated and no more modifications
106 # to the time zones (for daylight saving) are now made.
108 # From Rives McDow (2000-01-10):
109 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
110 # which did not result in the switch of a time zone, as they stayed 9 hours
111 # from the International Date Line.
112 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
113 # From Paul Eggert (2007-12-28):
114 # DST was set to expire on March 5, not March 3, but since it was converted
115 # to standard time on March 3 it's more convenient for us to pretend that
116 # it ended on March 3.
117 Rule Arg 2000 only - Mar 3 0:00 0 -
119 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
120 # We just checked with our Sao Paulo office and they say the government of
121 # Argentina decided not to become one of the countries that go on or off DST.
122 # So Buenos Aires should be -3 hours from GMT at all times.
124 # From Fabian L. Arce Jofre (2000-04-04):
125 # The law that claimed DST for Argentina was derogated by President Fernando
126 # de la Rua on March 2, 2000, because it would make people spend more energy
127 # in the winter time, rather than less. The change took effect on March 3.
129 # From Mariano Absatz (2001-06-06):
130 # one of the major newspapers here in Argentina said that the 1999
131 # Timezone Law (which never was effectively applied) will (would?) be
132 # in effect.... The article is at
133 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
134 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
135 # 1999-09-17, and published 1999-09-21. The official publication is at:
136 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
137 # Regretfully, you have to subscribe (and pay) for the on-line version....
140 # the timezone for Argentina will not change next Sunday.
141 # Apparently it will do so on Sunday 24th....
142 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
145 # Last Friday (yes, the last working day before the date of the change), the
146 # Senate annulled the 1999 law that introduced the changes later postponed.
147 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
148 # It remains the vote of the Deputies..., but it will be the same....
149 # This kind of things had always been done this way in Argentina.
150 # We are still -03:00 all year round in all of the country.
152 # From Steffen Thorsen (2007-12-21):
153 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
154 # all of the country (all Zone-entries) are affected. News reports like
155 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
156 # that Argentina will use DST next year as well, from October to
157 # March, although exact rules are not given.
159 # From Jesper Norgaard Welen (2007-12-26)
160 # The last hurdle of Argentina DST is over, the proposal was approved in
161 # the lower chamber too (Deputados) with a vote 192 for and 2 against.
162 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
163 # the original scanned proposal, where the dates and the zero hours are
164 # clear and unambiguous...This is the article about final approval:
165 # <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
166 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
169 # From Paul Eggert (2007-12-22):
170 # For dates after mid-2008, the following rules are my guesses and
171 # are quite possibly wrong, but are more likely than no DST at all.
173 # From Alexander Krivenyshev (2008-09-05):
174 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
175 # Argentina will start DST on Sunday October 19, 2008.
177 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
178 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
181 # <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
182 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
185 # From Rodrigo Severo (2008-10-06):
186 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
188 # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
189 # Hi, there is a problem with timezone-data-2008e and maybe with
190 # timezone-data-2008f
191 # Argentinian law [Number] 25.155 is no longer valid.
192 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
193 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
195 # The new one is law [Number] 26.350
196 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
197 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
199 # So there is no summer time in Argentina for now.
201 # From Mariano Absatz (2008-10-20):
202 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
203 # From 2008-10-19 until 2009-03-15
204 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
205 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
208 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
209 # Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
210 # and Tierra del Fuego
211 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
212 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
215 # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
216 # it will not apply DST either (even when it was not included in Decree 1705/2008)
217 # <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
218 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
221 # From fullinet (2009-10-18):
223 # <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356">
224 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
226 # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
228 # "Por el momento, el Gobierno Nacional resolvio no modificar la hora
229 # oficial, decision que estaba en estudio para su implementacion el
230 # domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio
231 # que la Argentina hoy, en estas condiciones meteorologicas, no necesita
232 # la modificacion del huso horario, ya que 2009 nos encuentra con
233 # crecimiento en la produccion y distribucion energetica."
235 Rule Arg 2007 only - Dec 30 0:00 1:00 S
236 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
237 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
239 # From Mariano Absatz (2004-05-21):
240 # Today it was officially published that the Province of Mendoza is changing
241 # its timezone this winter... starting tomorrow night....
242 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
243 # From Paul Eggert (2004-05-24):
244 # It's Law No. 7,210. This change is due to a public power emergency, so for
245 # now we'll assume it's for this year only.
247 # From Paul Eggert (2006-03-22):
248 # <a href="http://www.spicasc.net/horvera.html">
249 # Hora de verano para la Republica Argentina (2003-06-08)
250 # </a> says that standard time in Argentina from 1894-10-31
251 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
252 # over Shanks & Pottenger.
254 # From Mariano Absatz (2004-06-05):
255 # These media articles from a major newspaper mostly cover the current state:
256 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
257 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
259 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
260 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
261 # Apparently, all nine provinces would go back to UTC-03:00 at the same
262 # time in October 17th.
264 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
265 # Tierra del Fuego, Tucuman.
267 # From Mariano Absatz (2004-06-14):
268 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
269 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
270 # annoyance with the change is much higher than the power savings obtained....
272 # From Gwillim Law (2004-06-14):
273 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
274 # "The time change in Tierra del Fuego was a conflicted decision from
275 # the start. The government had decreed that the measure would take
276 # effect on June 1, but a normative error forced the new time to begin
277 # three days earlier, from a Saturday to a Sunday....
278 # Our understanding was that the change was originally scheduled to take place
279 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
280 # provinces). Sunday was May 30, only two days earlier. So the article
281 # contains a contradiction. I would give more credence to the Saturday/Sunday
282 # date than the "three days earlier" phrase, and conclude that Tierra del
283 # Fuego set its clocks back at 2004-05-30 00:00.
285 # From Steffen Thorsen (2004-10-05):
286 # The previous law 7210 which changed the province of Mendoza's time zone
287 # back in May have been modified slightly in a new law 7277, which set the
288 # new end date to 2004-09-26 (original date was 2004-10-17).
289 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
291 # From Mariano Absatz (2004-10-05):
292 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
293 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
294 # at midnight between Saturday, July 24th and Sunday, July 25th....
295 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
296 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
297 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
299 # From Alex Krivenyshev (2008-01-17):
300 # Here are articles that Argentina Province San Luis is planning to end DST
301 # as earlier as upcoming Monday January 21, 2008 or February 2008:
303 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
304 # (Argentine Province delayed clock and mark difference with the rest of the
306 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
307 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
310 # Es inminente que en San Luis atrasen una hora los relojes
311 # (It is imminent in San Luis clocks one hour delay)
312 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
313 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
316 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
317 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
320 # From Jesper Norgaard Welen (2008-01-18):
321 # The page of the San Luis provincial government
322 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
323 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
325 # confirms what Alex Krivenyshev has earlier sent to the tz
326 # emailing list about that San Luis plans to return to standard
327 # time much earlier than the rest of the country. It also
328 # confirms that upon request the provinces San Juan and Mendoza
329 # refused to follow San Luis in this change.
331 # The change is supposed to take place Monday the 21.st at 0:00
332 # hours. As far as I understand it if this goes ahead, we need
333 # a new timezone for San Luis (although there are also documented
334 # independent changes in the southamerica file of San Luis in
335 # 1990 and 1991 which has not been confirmed).
337 # From Jesper Norgaard Welen (2008-01-25):
338 # Unfortunately the below page has become defunct, about the San Luis
339 # time change. Perhaps because it now is part of a group of pages "Most
340 # important pages of 2008."
343 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
344 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
346 # instead it seems. Or use "Buscador" from the main page of the San Luis
347 # government, and fill in "huso" and click OK, and you will get 3 pages
348 # from which the first one is identical to the above.
350 # From Mariano Absatz (2008-01-28):
351 # I can confirm that the Province of San Luis (and so far only that
352 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
353 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
354 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
355 # (that is, unless they change their mind any minute now).
357 # So we'll have to add yet another city to 'southamerica' (I think San
358 # Luis city is the mos populated city in the Province, so it'd be
359 # America/Argentina/San_Luis... of course I can't remember if San Luis's
360 # history of particular changes goes along with Mendoza or San Juan :-(
361 # (I only remember not being able to collect hard facts about San Luis
362 # back in 2004, when these provinces changed to UTC-4 for a few days, I
363 # mailed them personally and never got an answer).
365 # From Paul Eggert (2008-06-30):
366 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
367 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
368 # America/Cordoba split into 6 subregions during 1991/1992, one of which
369 # was America/San_Luis, but we haven't verified this yet so for now we'll
370 # keep America/Cordoba a single region rather than splitting it into the
371 # other 5 subregions.
373 # From Mariano Absatz (2009-03-13):
374 # Yesterday (with our usual 2-day notice) the Province of San Luis
375 # decided that next Sunday instead of "staying" @utc-03:00 they will go
376 # to utc-04:00 until the second Saturday in October...
378 # The press release is at
379 # <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102">
380 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
382 # (I couldn't find the decree, but
383 # <a href="http://www.sanluis.gov.ar">
386 # is the official page for the Province Government).
388 # There's also a note in only one of the major national papers ...
389 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
391 # The press release says [quick and dirty translation]:
392 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
393 # inhabitants) will have to turn back one hour their clocks
395 # Since then, San Luis will establish its own Province timezone. Thus,
396 # during 2009, this timezone change will run from 00:00 the third Sunday
397 # in March until 24:00 of the second Saturday in October.
399 # From Mariano Absatz (2009-10-16):
400 # ...the Province of San Luis is a case in itself.
403 # <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>"
404 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
406 # is ambiguous because establishes a calendar from the 2nd Sunday in
407 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
408 # complement of that starting on the 2nd Sunday of March at 0:00 and
409 # ending on the 2nd Saturday of March at 24:00.
411 # This clearly breaks every time the 1st of March or October is a Sunday.
413 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
414 # Sunday of October and March.
416 # The problem is that the changes in the rest of the Provinces that did
417 # change in 2007/2008, were made according to the Federal Law and Decrees
418 # that did so on the 3rd Sunday of October and March.
420 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
421 # (October 11th) at 0:00.
423 # So I guess a new set of rules, besides "Arg", must be made and the last
424 # America/Argentina/San_Luis entries should change to use these...
426 # I'm enclosing a patch that does what I say... regretfully, the San Luis
427 # timezone must be called "WART/WARST" even when most of the time (like,
428 # right now) WARST == ART... that is, since last Sunday, all the country
429 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
430 # of the country calls it "ART".
433 # From Alexander Krivenyshev (2010-04-09):
434 # According to news reports from El Diario de la Republica Province San
435 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
436 # after April 11, 2010--will continue to have same time as rest of
437 # Argentina (UTC-3) (no DST).
439 # Confirmaron la prórroga del huso horario de verano (Spanish)
440 # <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9">
441 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
443 # or (some English translation):
444 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html">
445 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
448 # From Mariano Absatz (2010-04-12):
449 # yes...I can confirm this...and given that San Luis keeps calling
450 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
451 # rules...San Luis is still using "Western ARgentina Time" and it got
452 # stuck on Summer daylight savings time even though the summer is over.
454 # From Paul Eggert (2013-02-21):
455 # Milne says Cordoba time was -4:16:48.2. Round to the nearest second.
457 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
459 # Buenos Aires (BA), Capital Federal (CF),
460 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
461 -4:16:48 - CMT 1920 May # Cordoba Mean Time
463 -4:00 Arg AR%sT 1969 Oct 5
464 -3:00 Arg AR%sT 1999 Oct 3
465 -4:00 Arg AR%sT 2000 Mar 3
468 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
469 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
471 # Shanks & Pottenger also make the following claims, which we haven't verified:
472 # - Formosa switched to -3:00 on 1991-01-07.
473 # - Misiones switched to -3:00 on 1990-12-29.
474 # - Chaco switched to -3:00 on 1991-01-04.
475 # - Santiago del Estero switched to -4:00 on 1991-04-01,
476 # then to -3:00 on 1991-04-26.
478 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
479 -4:16:48 - CMT 1920 May
481 -4:00 Arg AR%sT 1969 Oct 5
482 -3:00 Arg AR%sT 1991 Mar 3
483 -4:00 - WART 1991 Oct 20
484 -3:00 Arg AR%sT 1999 Oct 3
485 -4:00 Arg AR%sT 2000 Mar 3
488 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
489 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
490 -4:16:48 - CMT 1920 May
492 -4:00 Arg AR%sT 1969 Oct 5
493 -3:00 Arg AR%sT 1991 Mar 3
494 -4:00 - WART 1991 Oct 20
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
501 Zone America/Argentina/Tucuman -4:20:52 - 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 13
514 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
515 -4:16:48 - CMT 1920 May
517 -4:00 Arg AR%sT 1969 Oct 5
518 -3:00 Arg AR%sT 1991 Mar 1
519 -4:00 - WART 1991 May 7
520 -3:00 Arg AR%sT 1999 Oct 3
521 -4:00 Arg AR%sT 2000 Mar 3
522 -3:00 - ART 2004 Jun 1
523 -4:00 - WART 2004 Jun 20
524 -3:00 Arg AR%sT 2008 Oct 18
528 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
529 -4:16:48 - CMT 1920 May
531 -4:00 Arg AR%sT 1969 Oct 5
532 -3:00 Arg AR%sT 1991 Mar 1
533 -4:00 - WART 1991 May 7
534 -3:00 Arg AR%sT 1999 Oct 3
535 -4:00 Arg AR%sT 2000 Mar 3
536 -3:00 - ART 2004 May 31
537 -4:00 - WART 2004 Jul 25
538 -3:00 Arg AR%sT 2008 Oct 18
542 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
543 -4:16:48 - CMT 1920 May
545 -4:00 Arg AR%sT 1969 Oct 5
546 -3:00 Arg AR%sT 1990 Mar 4
547 -4:00 - WART 1990 Oct 28
548 -4:00 1:00 WARST 1991 Mar 17
549 -4:00 - WART 1991 Oct 6
551 -3:00 Arg AR%sT 1999 Oct 3
552 -4:00 Arg AR%sT 2000 Mar 3
553 -3:00 Arg AR%sT 2008 Oct 18
556 # Catamarca (CT), Chubut (CH)
557 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
558 -4:16:48 - CMT 1920 May
560 -4:00 Arg AR%sT 1969 Oct 5
561 -3:00 Arg AR%sT 1991 Mar 3
562 -4:00 - WART 1991 Oct 20
563 -3:00 Arg AR%sT 1999 Oct 3
564 -4:00 Arg AR%sT 2000 Mar 3
565 -3:00 - ART 2004 Jun 1
566 -4:00 - WART 2004 Jun 20
567 -3:00 Arg AR%sT 2008 Oct 18
571 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
572 -4:16:48 - CMT 1920 May
574 -4:00 Arg AR%sT 1969 Oct 5
575 -3:00 Arg AR%sT 1990 Mar 4
576 -4:00 - WART 1990 Oct 15
577 -4:00 1:00 WARST 1991 Mar 1
578 -4:00 - WART 1991 Oct 15
579 -4:00 1:00 WARST 1992 Mar 1
580 -4:00 - WART 1992 Oct 18
581 -3:00 Arg AR%sT 1999 Oct 3
582 -4:00 Arg AR%sT 2000 Mar 3
583 -3:00 - ART 2004 May 23
584 -4:00 - WART 2004 Sep 26
585 -3:00 Arg AR%sT 2008 Oct 18
590 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
591 Rule SanLuis 2007 2009 - Oct Sun>=8 0:00 1:00 S
593 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
594 -4:16:48 - CMT 1920 May
596 -4:00 Arg AR%sT 1969 Oct 5
598 -3:00 1:00 ARST 1990 Mar 14
599 -4:00 - WART 1990 Oct 15
600 -4:00 1:00 WARST 1991 Mar 1
601 -4:00 - WART 1991 Jun 1
602 -3:00 - ART 1999 Oct 3
603 -4:00 1:00 WARST 2000 Mar 3
604 -3:00 - ART 2004 May 31
605 -4:00 - WART 2004 Jul 25
606 -3:00 Arg AR%sT 2008 Jan 21
610 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
611 -4:16:48 - CMT 1920 May # Cordoba Mean Time
613 -4:00 Arg AR%sT 1969 Oct 5
614 -3:00 Arg AR%sT 1999 Oct 3
615 -4:00 Arg AR%sT 2000 Mar 3
616 -3:00 - ART 2004 Jun 1
617 -4:00 - WART 2004 Jun 20
618 -3:00 Arg AR%sT 2008 Oct 18
621 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
622 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
623 -4:16:48 - CMT 1920 May # Cordoba Mean Time
625 -4:00 Arg AR%sT 1969 Oct 5
626 -3:00 Arg AR%sT 1999 Oct 3
627 -4:00 Arg AR%sT 2000 Mar 3
628 -3:00 - ART 2004 May 30
629 -4:00 - WART 2004 Jun 20
630 -3:00 Arg AR%sT 2008 Oct 18
634 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
635 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
636 -4:30 - ANT 1965 # Netherlands Antilles Time
640 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
641 Zone America/La_Paz -4:32:36 - LMT 1890
642 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
643 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
644 -4:00 - BOT # Bolivia Time
648 # From Paul Eggert (1993-11-18):
649 # The mayor of Rio recently attempted to change the time zone rules
650 # just in his city, in order to leave more summer time for the tourist trade.
651 # The rule change lasted only part of the day;
652 # the federal government refused to follow the city's rules, and business
653 # was in a chaos, so the mayor backed down that afternoon.
655 # From IATA SSIM (1996-02):
656 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
657 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
658 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
659 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
660 # [The last three states are new to this issue of the IATA SSIM.]
662 # From Gwillim Law (1996-10-07):
663 # Geography, history (Tocantins was part of Goias until 1989), and other
664 # sources of time zone information lead me to believe that AL, SE, and TO were
665 # always in BR1, and so the only change was whether or not they observed DST....
666 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
667 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
668 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
669 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
670 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
671 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
672 # become part of the state of Pernambuco). The boundary between BR1 and BR2
673 # has never been clearly stated. They've simply been called East and West.
674 # However, some conclusions can be drawn from another IATA manual: the Airline
675 # Coding Directory, which lists close to 400 airports in Brazil. For each
676 # airport it gives a time zone which is coded to the SSIM. From that
677 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
678 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
679 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
681 # From Marcos Tadeu (1998-09-27):
682 # <a href="http://pcdsh01.on.br/verao1.html">
683 # Brazilian official page
686 # From Jesper Norgaard (2000-11-03):
687 # [For an official list of which regions in Brazil use which time zones, see:]
688 # http://pcdsh01.on.br/Fusbr.htm
689 # http://pcdsh01.on.br/Fusbrhv.htm
691 # From Celso Doria via David Madeo (2002-10-09):
692 # The reason for the delay this year has to do with elections in Brazil.
694 # Unlike in the United States, elections in Brazil are 100% computerized and
695 # the results are known almost immediately. Yesterday, it was the first
696 # round of the elections when 115 million Brazilians voted for President,
697 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
698 # counting (or re-counting) votes anymore and we know there will be a second
699 # round for the Presidency and also for some Governors. The 2nd round will
700 # take place on October 27th.
702 # The reason why the DST will only begin November 3rd is that the thousands
703 # of electoral machines used cannot have their time changed, and since the
704 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
705 # the Government decided to postpone DST, instead of changing the Constitution
706 # (maybe, for the next elections, it will be possible to change the clock)...
708 # From Rodrigo Severo (2004-10-04):
709 # It's just the biannual change made necessary by the much hyped, supposedly
710 # modern Brazilian eletronic voting machines which, apparently, can't deal
711 # with a time change between the first and the second rounds of the elections.
713 # From Steffen Thorsen (2007-09-20):
714 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
715 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
717 # From Paul Schulze (2008-06-24):
718 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
719 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
720 # effective today (00:00am at June 24, 2008) as follows:
722 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
723 # part of the Amazonas state that had this timezone now being put to the
725 # b) The whole Para state now is put at timezone UTC+3, instead of just
726 # part of it, as was before.
728 # This change follows a proposal of senator Tiao Viana of Acre state, that
729 # proposed it due to concerns about open television channels displaying
730 # programs inappropriate to youths in the states that had the timezone
731 # UTC+5 too early in the night. In the occasion, some more corrections
732 # were proposed, trying to unify the timezones of any given state. This
733 # change modifies timezone rules defined in decree 2.784 of 18 June,
736 # From Rodrigo Severo (2008-06-24):
737 # Just correcting the URL:
738 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
739 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
742 # As a result of the above Decree I believe the America/Rio_Branco
743 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
744 # be created to represent the...west side of the Para State. I
745 # suggest this new timezone be called Santarem as the most
746 # important/populated city in the affected area.
748 # This new timezone would be the same as the Rio_Branco timezone up to
749 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
751 # From Alex Krivenyshev (2008-06-24):
752 # This is a quick reference page for New and Old Brazil Time Zones map.
753 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
754 # http://www.worldtimezone.com/brazil-time-new-old.php
757 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
758 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
759 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
761 # From Paul Eggert (2002-10-10):
762 # The official decrees referenced below are mostly taken from
763 # <a href="http://pcdsh01.on.br/DecHV.html">
764 # Decretos sobre o Horario de Verao no Brasil
767 # From Steffen Thorsen (2008-08-29):
768 # As announced by the government and many newspapers in Brazil late
769 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
770 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
771 # past years experience with the elections, there was a good chance that
772 # the start was postponed to November, but it did not happen this year.
774 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
776 # An official page about it:
777 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
778 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
780 # Note that this link does not always work directly, but must be accessed
782 # <a href="http://www.mme.gov.br/first">
783 # http://www.mme.gov.br/first
786 # One example link that works directly:
787 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
788 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
792 # We have a written a short article about it as well:
793 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
794 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
797 # From Alexander Krivenyshev (2011-10-04):
798 # State Bahia will return to Daylight savings time this year after 8 years off.
799 # The announcement was made by Governor Jaques Wagner in an interview to a
800 # television station in Salvador.
803 # <a href="http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html">
804 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
806 # <a href="http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html">
807 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
810 # From Guilherme Bernardes Rodrigues (2011-10-07):
811 # There is news in the media, however there is still no decree about it.
812 # I just send a e-mail to Zulmira Brandao at
813 # <a href="http://pcdsh01.on.br/">http://pcdsh01.on.br/</a> the
814 # official agency about time in Brazil, and she confirmed that the old rule is
817 # From Guilherme Bernardes Rodrigues (2011-10-14)
818 # It's official, the President signed a decree that includes Bahia in summer
820 # [ and in a second message (same day): ]
821 # I found the decree.
823 # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
825 # <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6">
826 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
829 # From Kelley Cook (2012-10-16):
830 # The governor of state of Bahia in Brazil announced on Thursday that
831 # due to public pressure, he is reversing the DST policy they implemented
832 # last year and will not be going to Summer Time on October 21st....
833 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
835 # From Rodrigo Severo (2012-10-16):
836 # Tocantins state will have DST.
837 # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
839 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
840 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
841 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
842 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
843 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
844 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
845 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
847 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
848 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
849 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
850 Rule Brazil 1950 only - Apr 16 1:00 0 -
851 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
852 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
853 Rule Brazil 1953 only - Mar 1 0:00 0 -
854 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
856 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
857 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
858 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
859 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
860 # extended the above decree to all of the national territory on 12-09.
861 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
862 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
863 # extended summer time by one day to 1964-03-01 00:00 (start of school).
864 Rule Brazil 1964 only - Mar 1 0:00 0 -
865 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
866 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
867 Rule Brazil 1965 only - Mar 31 0:00 0 -
868 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
869 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
870 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
871 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
872 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
873 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
875 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
876 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
877 # Decree 92,310 (1986-01-21)
878 # Decree 92,463 (1986-03-13)
879 Rule Brazil 1986 only - Mar 15 0:00 0 -
880 # Decree 93,316 (1986-10-01)
881 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
882 Rule Brazil 1987 only - Feb 14 0:00 0 -
883 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
884 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
885 Rule Brazil 1988 only - Feb 7 0:00 0 -
886 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
887 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
888 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
889 Rule Brazil 1989 only - Jan 29 0:00 0 -
890 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
891 # with the same exceptions
892 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
893 Rule Brazil 1990 only - Feb 11 0:00 0 -
894 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
895 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
896 # Decree 99,629 (1990-10-19) adds BA, MT.
897 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
898 Rule Brazil 1991 only - Feb 17 0:00 0 -
899 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
900 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
901 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
902 Rule Brazil 1992 only - Feb 9 0:00 0 -
903 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
904 # adopted by same states.
905 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
906 Rule Brazil 1993 only - Jan 31 0:00 0 -
907 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
908 # adopted by same states, plus AM.
909 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
910 # web page corrected 2004-01-07) adopted by same states, minus AM.
911 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
912 # adopted by same states, plus MT and TO.
913 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
915 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
916 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
917 Rule Brazil 1996 only - Feb 11 0:00 0 -
918 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
919 # adopted by same states, minus AL, SE.
920 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
921 Rule Brazil 1997 only - Feb 16 0:00 0 -
922 # From Daniel C. Sobral (1998-02-12):
923 # In 1997, the DS began on October 6. The stated reason was that
924 # because international television networks ignored Brazil's policy on DS,
925 # they bought the wrong times on satellite for coverage of Pope's visit.
926 # This year, the ending date of DS was postponed to March 1
927 # to help dealing with the shortages of electric power.
929 # Decree 2,317 (1997-09-04), adopted by same states.
930 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
931 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
933 Rule Brazil 1998 only - Mar 1 0:00 0 -
934 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
935 # adopted by the same states as before.
936 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
937 Rule Brazil 1999 only - Feb 21 0:00 0 -
938 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
939 # (1999-08-23) adopted by same states.
940 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
941 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
942 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
943 Rule Brazil 2000 only - Feb 27 0:00 0 -
944 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
945 # adopted by the same states as before.
946 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
947 # repeals DST in PE and RR, effective 2000-10-15 00:00.
948 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
949 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
950 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
951 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
952 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
953 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
954 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
955 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
956 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
957 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
958 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
959 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
960 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
961 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
962 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
963 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
964 # adopted by the same states as before.
965 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
966 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
967 # adopted by the same states as before.
968 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
969 Rule Brazil 2007 only - Feb 25 0:00 0 -
970 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
971 # adopted by the same states as before.
972 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
973 # From Frederico A. C. Neves (2008-09-10):
974 # Acording to this decree
975 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
976 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
978 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
979 # 3rd Feb Sunday. There is an exception on the return date when this is
980 # the Carnival Sunday then the return date will be the next Sunday...
981 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
982 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
983 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
984 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
985 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
986 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
987 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
988 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
989 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
990 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
991 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
992 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
993 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
994 # From Arthur David Olson (2008-09-29):
995 # The next is wrong in some years but is better than nothing.
996 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
998 # The latest ruleset listed above says that the following states observe DST:
999 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
1001 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1003 # Fernando de Noronha (administratively part of PE)
1004 Zone America/Noronha -2:09:40 - LMT 1914
1005 -2:00 Brazil FN%sT 1990 Sep 17
1006 -2:00 - FNT 1999 Sep 30
1007 -2:00 Brazil FN%sT 2000 Oct 15
1008 -2:00 - FNT 2001 Sep 13
1009 -2:00 Brazil FN%sT 2002 Oct 1
1011 # Other Atlantic islands have no permanent settlement.
1012 # These include Trindade and Martin Vaz (administratively part of ES),
1013 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
1014 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
1015 # it also included the Penedos.
1017 # Amapa (AP), east Para (PA)
1018 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
1019 # The division between east and west Para is the river Xingu.
1020 # In the north a very small part from the river Javary (now Jari I guess,
1021 # the border with Amapa) to the Amazon, then to the Xingu.
1022 Zone America/Belem -3:13:56 - LMT 1914
1023 -3:00 Brazil BR%sT 1988 Sep 12
1027 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
1028 Zone America/Santarem -3:38:48 - LMT 1914
1029 -4:00 Brazil AM%sT 1988 Sep 12
1030 -4:00 - AMT 2008 Jun 24 00:00
1033 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
1035 Zone America/Fortaleza -2:34:00 - LMT 1914
1036 -3:00 Brazil BR%sT 1990 Sep 17
1037 -3:00 - BRT 1999 Sep 30
1038 -3:00 Brazil BR%sT 2000 Oct 22
1039 -3:00 - BRT 2001 Sep 13
1040 -3:00 Brazil BR%sT 2002 Oct 1
1043 # Pernambuco (PE) (except Atlantic islands)
1044 Zone America/Recife -2:19:36 - LMT 1914
1045 -3:00 Brazil BR%sT 1990 Sep 17
1046 -3:00 - BRT 1999 Sep 30
1047 -3:00 Brazil BR%sT 2000 Oct 15
1048 -3:00 - BRT 2001 Sep 13
1049 -3:00 Brazil BR%sT 2002 Oct 1
1053 Zone America/Araguaina -3:12:48 - LMT 1914
1054 -3:00 Brazil BR%sT 1990 Sep 17
1055 -3:00 - BRT 1995 Sep 14
1056 -3:00 Brazil BR%sT 2003 Sep 24
1057 -3:00 - BRT 2012 Oct 21
1060 # Alagoas (AL), Sergipe (SE)
1061 Zone America/Maceio -2:22:52 - LMT 1914
1062 -3:00 Brazil BR%sT 1990 Sep 17
1063 -3:00 - BRT 1995 Oct 13
1064 -3:00 Brazil BR%sT 1996 Sep 4
1065 -3:00 - BRT 1999 Sep 30
1066 -3:00 Brazil BR%sT 2000 Oct 22
1067 -3:00 - BRT 2001 Sep 13
1068 -3:00 Brazil BR%sT 2002 Oct 1
1072 # There are too many Salvadors elsewhere, so use America/Bahia instead
1073 # of America/Salvador.
1074 Zone America/Bahia -2:34:04 - LMT 1914
1075 -3:00 Brazil BR%sT 2003 Sep 24
1076 -3:00 - BRT 2011 Oct 16
1077 -3:00 Brazil BR%sT 2012 Oct 21
1080 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
1081 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
1082 # Santa Catarina (SC), Rio Grande do Sul (RS)
1083 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1084 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1085 -3:00 1:00 BRST 1964
1088 # Mato Grosso do Sul (MS)
1089 Zone America/Campo_Grande -3:38:28 - LMT 1914
1093 Zone America/Cuiaba -3:44:20 - LMT 1914
1094 -4:00 Brazil AM%sT 2003 Sep 24
1095 -4:00 - AMT 2004 Oct 1
1099 Zone America/Porto_Velho -4:15:36 - LMT 1914
1100 -4:00 Brazil AM%sT 1988 Sep 12
1104 Zone America/Boa_Vista -4:02:40 - LMT 1914
1105 -4:00 Brazil AM%sT 1988 Sep 12
1106 -4:00 - AMT 1999 Sep 30
1107 -4:00 Brazil AM%sT 2000 Oct 15
1110 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1111 # The great circle line from Tabatinga to Porto Acre divides
1112 # east from west Amazonas.
1113 Zone America/Manaus -4:00:04 - LMT 1914
1114 -4:00 Brazil AM%sT 1988 Sep 12
1115 -4:00 - AMT 1993 Sep 28
1116 -4:00 Brazil AM%sT 1994 Sep 22
1119 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1120 # Eirunepe, Envira, Ipixuna
1121 Zone America/Eirunepe -4:39:28 - LMT 1914
1122 -5:00 Brazil AC%sT 1988 Sep 12
1123 -5:00 - ACT 1993 Sep 28
1124 -5:00 Brazil AC%sT 1994 Sep 22
1125 -5:00 - ACT 2008 Jun 24 00:00
1129 Zone America/Rio_Branco -4:31:12 - LMT 1914
1130 -5:00 Brazil AC%sT 1988 Sep 12
1131 -5:00 - ACT 2008 Jun 24 00:00
1136 # From Eduardo Krell (1995-10-19):
1137 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1138 # of October.... The law is the same for March and October.
1140 # Because of the drought this year, the government decided to go into
1141 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1142 # (unless there's another dry season next year, I guess).
1144 # From Julio I. Pacheco Troncoso (1999-03-18):
1145 # Because of the same drought, the government decided to end DST later,
1146 # on April 3, (one-time change).
1148 # From Oscar van Vlijmen (2006-10-08):
1149 # http://www.horaoficial.cl/cambio.htm
1151 # From Jesper Norgaard Welen (2006-10-08):
1152 # I think that there are some obvious mistakes in the suggested link
1153 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1154 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1155 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1156 # anyhow it clears up some doubts too.
1158 # From Paul Eggert (2006-12-27):
1159 # The following data for Chile and America/Santiago are from
1160 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1161 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1162 # & Pottenger, except with DST transitions after 1932 cloned from
1163 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1164 # but we have no other source.
1166 # From German Poo-Caaman~o (2008-03-03):
1167 # Due to drought, Chile extends Daylight Time in three weeks. This
1168 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1169 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1170 # The Supreme Decree is located at
1171 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1172 # http://www.shoa.cl/servicios/supremo316.pdf
1174 # and the instructions for 2008 are located in:
1175 # <a href="http://www.horaoficial.cl/cambio.htm">
1176 # http://www.horaoficial.cl/cambio.htm
1179 # From Jose Miguel Garrido (2008-03-05):
1181 # You could see the announces of the change on
1182 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1183 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1186 # From Angel Chiang (2010-03-04):
1187 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1188 # <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098">
1189 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1191 # (in Spanish, last paragraph).
1193 # This is breaking news. There should be more information available later.
1195 # From Arthur Daivd Olson (2010-03-06):
1196 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1198 # From Glenn Eychaner (2011-03-02): [geychaner@mac.com]
1199 # It appears that the Chilean government has decided to postpone the
1200 # change from summer time to winter time again, by three weeks to April
1202 # <a href="http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651">
1203 # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1206 # This is not yet reflected in the offical "cambio de hora" site, but
1207 # probably will be soon:
1208 # <a href="http://www.horaoficial.cl/cambio.htm">
1209 # http://www.horaoficial.cl/cambio.htm
1212 # From Arthur David Olson (2011-03-02):
1213 # The emol.com article mentions a water shortage as the cause of the
1214 # postponement, which may mean that it's not a permanent change.
1216 # From Glenn Eychaner (2011-03-28):
1218 # <a href="http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}">
1219 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1223 # Chile's clocks will go back an hour this year on the 7th of May instead
1224 # of this Saturday. They will go forward again the 3rd Saturday in
1225 # August, not in October as they have since 1968. This is a pilot plan
1226 # which will be reevaluated in 2012.
1228 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1229 # As stated in the website of the Chilean Energy Ministry
1230 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1231 # The Chilean Government has decided to postpone the entrance into winter time
1232 # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1233 # been yet formalized but it will within the next days.
1234 # Quote from the website communication:
1236 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1237 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1238 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1240 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1241 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1242 # 01:00 on September 2.
1244 # From Steffen Thorsen (2013-02-15):
1245 # According to several news sources, Chile has extended DST this year,
1246 # they will end DST later and start DST earlier than planned. They
1247 # hope to save energy. The new end date is 2013-04-28 00:00 and new
1248 # start date is 2013-09-08 00:00....
1249 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1251 # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1252 # 'antarctica' file.
1254 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1255 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1256 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1257 Rule Chile 1942 only - Jun 1 4:00u 0 -
1258 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1259 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1260 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1261 Rule Chile 1947 only - Apr 1 4:00u 0 -
1262 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1263 Rule Chile 1969 only - Mar 30 3:00u 0 -
1264 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1265 Rule Chile 1970 only - Mar 29 3:00u 0 -
1266 Rule Chile 1971 only - Mar 14 3:00u 0 -
1267 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1268 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1269 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1270 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1271 Rule Chile 1987 only - Apr 12 3:00u 0 -
1272 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1273 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1274 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1275 Rule Chile 1990 only - Mar 18 3:00u 0 -
1276 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1277 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1278 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1279 Rule Chile 1997 only - Mar 30 3:00u 0 -
1280 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1281 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1282 Rule Chile 1999 only - Apr 4 3:00u 0 -
1283 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1284 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1285 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1286 # which is used below in specifying the transition.
1287 Rule Chile 2008 only - Mar 30 3:00u 0 -
1288 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1289 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1290 Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1291 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1292 Rule Chile 2012 max - Apr Sun>=23 3:00u 0 -
1293 Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
1294 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1295 # (1996-09) says 1998-03-08. Ignore these.
1296 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1297 Zone America/Santiago -4:42:46 - LMT 1890
1298 -4:42:46 - SMT 1910 # Santiago Mean Time
1299 -5:00 - CLT 1916 Jul 1 # Chile Time
1300 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1301 -4:00 - CLT 1919 Jul 1 # Chile Time
1302 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1303 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1305 Zone Pacific/Easter -7:17:44 - LMT 1890
1306 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1307 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1310 # Sala y Gomez Island is like Pacific/Easter.
1311 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1312 # San Felix, and Antarctic bases, are like America/Santiago.
1316 # Milne gives 4:56:16.4 for Bogota time in 1899; round to nearest. He writes,
1317 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1319 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1320 Rule CO 1992 only - May 3 0:00 1:00 S
1321 Rule CO 1993 only - Apr 4 0:00 0 -
1322 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1323 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1324 -4:56:16 - BMT 1914 Nov 23 # Bogota Mean Time
1325 -5:00 CO CO%sT # Colombia Time
1326 # Malpelo, Providencia, San Andres
1327 # no information; probably like America/Bogota
1331 # Milne gives 4:35:46.9 for Curacao mean time; round to nearest.
1333 # From Paul Eggert (2006-03-22):
1334 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1335 # -4:00 since standard time was introduced on 1912-03-02; and that
1336 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1337 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1338 # Saba Island has been like Curacao.
1339 # This all predates our 1970 cutoff, though.
1341 # By July 2007 Curacao and St Maarten are planned to become
1342 # associated states within the Netherlands, much like Aruba;
1343 # Bonaire, Saba and St Eustatius would become directly part of the
1344 # Netherlands as Kingdom Islands. This won't affect their time zones
1345 # though, as far as we know.
1347 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1348 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1349 -4:30 - ANT 1965 # Netherlands Antilles Time
1352 # From Arthur David Olson (2011-06-15):
1353 # At least for now, use links for places with new iso3166 codes.
1354 # The name "Lower Prince's Quarter" is both longer than fourteen charaters
1355 # and contains an apostrophe; use "Lower_Princes" below.
1357 Link America/Curacao America/Lower_Princes # Sint Maarten
1358 Link America/Curacao America/Kralendijk # Bonaire, Sint Estatius and Saba
1362 # Milne says the Sentral and South American Telegraph Company used -5:24:15.
1364 # From Paul Eggert (2007-03-04):
1365 # Apparently Ecuador had a failed experiment with DST in 1992.
1366 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1367 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1368 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1370 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1371 Zone America/Guayaquil -5:19:20 - LMT 1890
1372 -5:14:00 - QMT 1931 # Quito Mean Time
1373 -5:00 - ECT # Ecuador Time
1374 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1376 -6:00 - GALT # Galapagos Time
1380 # From Paul Eggert (2006-03-22):
1381 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1382 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1384 # From Falkland Islands Government Office, London (2001-01-22)
1385 # via Jesper Norgaard:
1386 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1387 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1388 # September. It is anticipated that the clocks will revert back at 2
1389 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1390 # Sunday 1 September.
1392 # From Rives McDow (2001-02-13):
1394 # I have communicated several times with people there, and the last
1395 # time I had communications that was helpful was in 1998. Here is
1396 # what was said then:
1398 # "The general rule was that Stanley used daylight saving and the Camp
1399 # did not. However for various reasons many people in the Camp have
1400 # started to use daylight saving (known locally as 'Stanley Time')
1401 # There is no rule as to who uses daylight saving - it is a matter of
1402 # personal choice and so it is impossible to draw a map showing who
1403 # uses it and who does not. Any list would be out of date as soon as
1404 # it was produced. This year daylight saving ended on April 18/19th
1405 # and started again on September 12/13th. I do not know what the rule
1406 # is, but can find out if you like. We do not change at the same time
1409 # I did have in my notes that the rule was "Second Saturday in Sep at
1410 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1411 # not agree in some cases with Shanks; is this true?
1413 # Also, there is no mention in the list that some areas in the
1414 # Falklands do not use DST. I have found in my communications there
1415 # that these areas are on the western half of East Falkland and all of
1416 # West Falkland. Stanley is the only place that consistently observes
1417 # DST. Again, as in other places in the world, the farmers don't like
1418 # it. West Falkland is almost entirely sheep farmers.
1420 # I know one lady there that keeps a list of which farm keeps DST and
1421 # which doesn't each year. She runs a shop in Stanley, and says that
1422 # the list changes each year. She uses it to communicate to her
1423 # customers, catching them when they are home for lunch or dinner.
1425 # From Paul Eggert (2001-03-05):
1426 # For now, we'll just record the time in Stanley, since we have no
1429 # From Steffen Thorsen (2011-04-01):
1430 # The Falkland Islands will not turn back clocks this winter, but stay on
1431 # daylight saving time.
1434 # <a href="http://www.falklandnews.com/public/story.cfm?get=5914&source=3">
1435 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1438 # We have gotten this confirmed by a clerk of the legislative assembly:
1439 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1440 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1441 # hours) on the first Sunday of September at 0200hrs.
1443 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1444 # will not revert to local mean time, but clocks will remain on Summer
1445 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1446 # change to local time following the trial period will be notified.
1448 # From Andrew Newman (2012-02-24)
1449 # A letter from Justin McPhee, Chief Executive,
1450 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1452 # The current Atlantic/Stanley entry under South America expects the
1453 # clocks to go back to standard Falklands Time (FKT) on the 15th April.
1454 # The database entry states that in 2011 Stanley was staying on fixed
1455 # summer time on a trial basis only. FIG need to contact IANA and/or
1456 # the maintainers of the database to inform them we're adopting
1457 # the same policy this year and suggest recommendations for future years.
1459 # For now we will assume permanent summer time for the Falklands
1460 # until advised differently (to apply for 2012 and beyond, after the 2011
1461 # experiment was apparently successful.)
1462 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1463 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1464 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1465 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1466 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1467 Rule Falk 1943 only - Jan 1 0:00 0 -
1468 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1469 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1470 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1471 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1472 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1473 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1474 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1475 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1476 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1477 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1478 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1479 -3:00 Falk FK%sT 1985 Sep 15
1480 -4:00 Falk FK%sT 2010 Sep 5 02:00
1484 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1485 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1486 -4:00 - GFT 1967 Oct # French Guiana Time
1490 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1491 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1492 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1493 -3:45 - GYT 1975 Jul 31 # Guyana Time
1495 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1499 # From Paul Eggert (2006-03-22):
1500 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1501 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1502 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1503 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1504 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1505 Rule Para 1975 1978 - Mar 1 0:00 0 -
1506 Rule Para 1979 1991 - Apr 1 0:00 0 -
1507 Rule Para 1989 only - Oct 22 0:00 1:00 S
1508 Rule Para 1990 only - Oct 1 0:00 1:00 S
1509 Rule Para 1991 only - Oct 6 0:00 1:00 S
1510 Rule Para 1992 only - Mar 1 0:00 0 -
1511 Rule Para 1992 only - Oct 5 0:00 1:00 S
1512 Rule Para 1993 only - Mar 31 0:00 0 -
1513 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1514 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1515 Rule Para 1996 only - Mar 1 0:00 0 -
1516 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1517 # From Steffen Thorsen (2000-10-02):
1518 # I have three independent reports that Paraguay changed to DST this Sunday
1521 # Translated by Gwillim Law (2001-02-27) from
1522 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1523 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1525 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1526 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1527 # system has been operating for several years. Formerly there was a separate
1528 # decree each year; the new law has the same effect, but permanently. Every
1529 # year, the time will change on the first Sunday of October; likewise, the
1530 # clock will be set back on the first Sunday of March.
1532 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1533 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1534 Rule Para 1997 only - Feb lastSun 0:00 0 -
1535 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1536 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1537 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1538 # From Rives McDow (2002-02-28):
1539 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1540 # dst method to be from the first Sunday in September to the first Sunday in
1542 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1543 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1545 # From Jesper Norgaard Welen (2005-01-02):
1546 # There are several sources that claim that Paraguay made
1547 # a timezone rule change in autumn 2004.
1548 # From Steffen Thorsen (2005-01-05):
1549 # Decree 1,867 (2004-03-05)
1550 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1551 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1552 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1553 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1554 # From Carlos Raul Perasso (2010-02-18):
1555 # By decree number 3958 issued yesterday (
1556 # <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf">
1557 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1560 # Paraguay changes its DST schedule, postponing the March rule to April and
1561 # modifying the October date. The decree reads:
1563 # Art. 1. It is hereby established that from the second Sunday of the month of
1564 # April of this year (2010), the official time is to be set back 60 minutes,
1565 # and that on the first Sunday of the month of October, it is to be set
1566 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1568 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1569 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1571 # From Steffen Thorsen (2013-03-07):
1572 # Paraguay will end DST on 2013-03-24 00:00....
1573 # http://www.ande.gov.py/interna.php?id=1075
1575 # From Carlos Raul Perasso (2013-03-15):
1576 # The change in Paraguay is now final. Decree number 10780
1577 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1578 Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1580 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1581 Zone America/Asuncion -3:50:40 - LMT 1890
1582 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1583 -4:00 - PYT 1972 Oct # Paraguay Time
1584 -3:00 - PYT 1974 Apr
1589 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1590 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1591 # When we were in Peru in 1985-1986, they apparently switched over
1592 # sometime between December 29 and January 3 while we were on the Amazon.
1594 # From Paul Eggert (2006-03-22):
1595 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1597 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1598 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1599 Rule Peru 1938 only - Apr 1 0:00 0 -
1600 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1601 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1602 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1603 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1604 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1605 Rule Peru 1990 only - Apr 1 0:00 0 -
1606 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1607 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1608 Rule Peru 1994 only - Apr 1 0:00 0 -
1609 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1610 Zone America/Lima -5:08:12 - LMT 1890
1611 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1612 -5:00 Peru PE%sT # Peru Time
1615 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1616 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1617 -2:00 - GST # South Georgia Time
1620 # uninhabited; scientific personnel have wintered
1623 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1624 Zone America/Paramaribo -3:40:40 - LMT 1911
1625 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1626 -3:40:36 - PMT 1945 Oct # The capital moved?
1627 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1628 -3:30 - SRT 1984 Oct # Suriname Time
1631 # Trinidad and Tobago
1632 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1633 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1637 # From Paul Eggert (1993-11-18):
1638 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1639 # From Shanks & Pottenger:
1640 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1641 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1642 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1643 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1644 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1645 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1646 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1647 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1648 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1649 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1650 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1651 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1652 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1653 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1654 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1655 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1656 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1657 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1658 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1659 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1660 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1661 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1662 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1663 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1664 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1665 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1666 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1667 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1668 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1669 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1670 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1671 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1672 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1673 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1674 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1675 Rule Uruguay 1980 only - May 1 0:00 0 -
1676 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1677 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1678 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1679 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1680 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1681 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1682 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1683 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1684 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1685 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1686 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1687 # From Eduardo Cota (2004-09-20):
1688 # The uruguayan government has decreed a change in the local time....
1689 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1690 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1691 # From Steffen Thorsen (2005-03-11):
1692 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1693 # save energy ... it was postponed two weeks....
1694 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1695 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1696 # From Eduardo Cota (2005-09-27):
1697 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1698 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1699 # 02:00 local time, official time in Uruguay will be at GMT -2.
1700 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1701 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1702 # From Jesper Norgaard Welen (2006-09-06):
1703 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1704 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1705 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1706 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1707 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1708 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1709 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1714 # From John Stainforth (2007-11-28):
1715 # ... the change for Venezuela originally expected for 2007-12-31 has
1716 # been brought forward to 2007-12-09. The official announcement was
1717 # published today in the "Gaceta Oficial de la Republica Bolivariana
1718 # de Venezuela, numero 38.819" (official document for all laws or
1719 # resolution publication)
1720 # http://www.globovision.com/news.php?nid=72208
1722 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1723 Zone America/Caracas -4:27:44 - LMT 1890
1724 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1725 -4:30 - VET 1965 # Venezuela Time
1726 -4:00 - VET 2007 Dec 9 03:00
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