2 # @(#)southamerica 8.44
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 # From fullinet (2009-10-18):
220 # <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356">
221 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
223 # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
225 # "Por el momento, el Gobierno Nacional resolvio no modificar la hora
226 # oficial, decision que estaba en estudio para su implementacion el
227 # domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio
228 # que la Argentina hoy, en estas condiciones meteorologicas, no necesita
229 # la modificacion del huso horario, ya que 2009 nos encuentra con
230 # crecimiento en la produccion y distribucion energetica."
232 Rule Arg 2007 only - Dec 30 0:00 1:00 S
233 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
234 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
236 # From Mariano Absatz (2004-05-21):
237 # Today it was officially published that the Province of Mendoza is changing
238 # its timezone this winter... starting tomorrow night....
239 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
240 # From Paul Eggert (2004-05-24):
241 # It's Law No. 7,210. This change is due to a public power emergency, so for
242 # now we'll assume it's for this year only.
244 # From Paul Eggert (2006-03-22):
245 # <a href="http://www.spicasc.net/horvera.html">
246 # Hora de verano para la Republica Argentina (2003-06-08)
247 # </a> says that standard time in Argentina from 1894-10-31
248 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
249 # over Shanks & Pottenger.
251 # From Mariano Absatz (2004-06-05):
252 # These media articles from a major newspaper mostly cover the current state:
253 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
254 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
256 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
257 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
258 # Apparently, all nine provinces would go back to UTC-03:00 at the same
259 # time in October 17th.
261 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
262 # Tierra del Fuego, Tucuman.
264 # From Mariano Absatz (2004-06-14):
265 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
266 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
267 # annoyance with the change is much higher than the power savings obtained....
269 # From Gwillim Law (2004-06-14):
270 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
271 # "The time change in Tierra del Fuego was a conflicted decision from
272 # the start. The government had decreed that the measure would take
273 # effect on June 1, but a normative error forced the new time to begin
274 # three days earlier, from a Saturday to a Sunday....
275 # Our understanding was that the change was originally scheduled to take place
276 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
277 # provinces). Sunday was May 30, only two days earlier. So the article
278 # contains a contradiction. I would give more credence to the Saturday/Sunday
279 # date than the "three days earlier" phrase, and conclude that Tierra del
280 # Fuego set its clocks back at 2004-05-30 00:00.
282 # From Steffen Thorsen (2004-10-05):
283 # The previous law 7210 which changed the province of Mendoza's time zone
284 # back in May have been modified slightly in a new law 7277, which set the
285 # new end date to 2004-09-26 (original date was 2004-10-17).
286 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
288 # From Mariano Absatz (2004-10-05):
289 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
290 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
291 # at midnight between Saturday, July 24th and Sunday, July 25th....
292 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
293 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
294 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
296 # From Alex Krivenyshev (2008-01-17):
297 # Here are articles that Argentina Province San Luis is planning to end DST
298 # as earlier as upcoming Monday January 21, 2008 or February 2008:
300 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
301 # (Argentine Province delayed clock and mark difference with the rest of the
303 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
304 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
307 # Es inminente que en San Luis atrasen una hora los relojes
308 # (It is imminent in San Luis clocks one hour delay)
309 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
310 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
313 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
314 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
317 # From Jesper Norgaard Welen (2008-01-18):
318 # The page of the San Luis provincial government
319 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
320 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
322 # confirms what Alex Krivenyshev has earlier sent to the tz
323 # emailing list about that San Luis plans to return to standard
324 # time much earlier than the rest of the country. It also
325 # confirms that upon request the provinces San Juan and Mendoza
326 # refused to follow San Luis in this change.
328 # The change is supposed to take place Monday the 21.st at 0:00
329 # hours. As far as I understand it if this goes ahead, we need
330 # a new timezone for San Luis (although there are also documented
331 # independent changes in the southamerica file of San Luis in
332 # 1990 and 1991 which has not been confirmed).
334 # From Jesper Norgaard Welen (2008-01-25):
335 # Unfortunately the below page has become defunct, about the San Luis
336 # time change. Perhaps because it now is part of a group of pages "Most
337 # important pages of 2008."
340 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
341 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
343 # instead it seems. Or use "Buscador" from the main page of the San Luis
344 # government, and fill in "huso" and click OK, and you will get 3 pages
345 # from which the first one is identical to the above.
347 # From Mariano Absatz (2008-01-28):
348 # I can confirm that the Province of San Luis (and so far only that
349 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
350 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
351 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
352 # (that is, unless they change their mind any minute now).
354 # So we'll have to add yet another city to 'southamerica' (I think San
355 # Luis city is the mos populated city in the Province, so it'd be
356 # America/Argentina/San_Luis... of course I can't remember if San Luis's
357 # history of particular changes goes along with Mendoza or San Juan :-(
358 # (I only remember not being able to collect hard facts about San Luis
359 # back in 2004, when these provinces changed to UTC-4 for a few days, I
360 # mailed them personally and never got an answer).
362 # From Paul Eggert (2008-06-30):
363 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
364 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
365 # America/Cordoba split into 6 subregions during 1991/1992, one of which
366 # was America/San_Luis, but we haven't verified this yet so for now we'll
367 # keep America/Cordoba a single region rather than splitting it into the
368 # other 5 subregions.
370 # From Mariano Absatz (2009-03-13):
371 # Yesterday (with our usual 2-day notice) the Province of San Luis
372 # decided that next Sunday instead of "staying" @utc-03:00 they will go
373 # to utc-04:00 until the second Saturday in October...
375 # The press release is at
376 # <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102">
377 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
379 # (I couldn't find the decree, but
380 # <a href="http://www.sanluis.gov.ar">
383 # is the official page for the Province Government).
385 # There's also a note in only one of the major national papers (La Nación) at
386 # <a href="http://www.lanacion.com.ar/nota.asp?nota_id=1107912">
387 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
390 # The press release says:
391 # (...) anunció que el próximo domingo a las 00:00 los puntanos deberán
392 # atrasar una hora sus relojes.
394 # A partir de entonces, San Luis establecerá el huso horario propio de
395 # la Provincia. De esta manera, durante el periodo del calendario anual
396 # 2009, el cambio horario quedará comprendido entre las 00:00 del tercer
397 # domingo de marzo y las 24:00 del segundo sábado de octubre.
398 # Quick&dirty translation
399 # (...) announced that next Sunday, at 00:00, Puntanos (the San Luis
400 # inhabitants) will have to turn back one hour their clocks
402 # Since then, San Luis will establish its own Province timezone. Thus,
403 # during 2009, this timezone change will run from 00:00 the third Sunday
404 # in March until 24:00 of the second Saturday in October.
406 # From Mariano Absatz (2009-10-16):
407 # ...the Province of San Luis is a case in itself.
410 # <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>"
411 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
413 # is ambiguous because establishes a calendar from the 2nd Sunday in
414 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
415 # complement of that starting on the 2nd Sunday of March at 0:00 and
416 # ending on the 2nd Saturday of March at 24:00.
418 # This clearly breaks every time the 1st of March or October is a Sunday.
420 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
421 # Sunday of October and March.
423 # The problem is that the changes in the rest of the Provinces that did
424 # change in 2007/2008, were made according to the Federal Law and Decrees
425 # that did so on the 3rd Sunday of October and March.
427 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
428 # (October 11th) at 0:00.
430 # So I guess a new set of rules, besides "Arg", must be made and the last
431 # America/Argentina/San_Luis entries should change to use these...
433 # I'm enclosing a patch that does what I say... regretfully, the San Luis
434 # timezone must be called "WART/WARST" even when most of the time (like,
435 # right now) WARST == ART... that is, since last Sunday, all the country
436 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
437 # of the country calls it "ART".
440 # From Alexander Krivenyshev (2010-04-09):
441 # According to news reports from El Diario de la Republica Province San
442 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
443 # after April 11, 2010--will continue to have same time as rest of
444 # Argentina (UTC-3) (no DST).
446 # Confirmaron la prórroga del huso horario de verano (Spanish)
447 # <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9">
448 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
450 # or (some English translation):
451 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html">
452 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
455 # From Mariano Absatz (2010-04-12):
456 # yes...I can confirm this...and given that San Luis keeps calling
457 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
458 # rules...San Luis is still using "Western ARgentina Time" and it got
459 # stuck on Summer daylight savings time even though the summer is over.
461 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
463 # Buenos Aires (BA), Capital Federal (CF),
464 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
465 -4:16:48 - CMT 1920 May # Cordoba Mean Time
467 -4:00 Arg AR%sT 1969 Oct 5
468 -3:00 Arg AR%sT 1999 Oct 3
469 -4:00 Arg AR%sT 2000 Mar 3
472 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
473 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
475 # Shanks & Pottenger also make the following claims, which we haven't verified:
476 # - Formosa switched to -3:00 on 1991-01-07.
477 # - Misiones switched to -3:00 on 1990-12-29.
478 # - Chaco switched to -3:00 on 1991-01-04.
479 # - Santiago del Estero switched to -4:00 on 1991-04-01,
480 # then to -3:00 on 1991-04-26.
482 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
483 -4:16:48 - CMT 1920 May
485 -4:00 Arg AR%sT 1969 Oct 5
486 -3:00 Arg AR%sT 1991 Mar 3
487 -4:00 - WART 1991 Oct 20
488 -3:00 Arg AR%sT 1999 Oct 3
489 -4:00 Arg AR%sT 2000 Mar 3
492 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
493 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
494 -4:16:48 - CMT 1920 May
496 -4:00 Arg AR%sT 1969 Oct 5
497 -3:00 Arg AR%sT 1991 Mar 3
498 -4:00 - WART 1991 Oct 20
499 -3:00 Arg AR%sT 1999 Oct 3
500 -4:00 Arg AR%sT 2000 Mar 3
501 -3:00 Arg AR%sT 2008 Oct 18
505 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
506 -4:16:48 - CMT 1920 May
508 -4:00 Arg AR%sT 1969 Oct 5
509 -3:00 Arg AR%sT 1991 Mar 3
510 -4:00 - WART 1991 Oct 20
511 -3:00 Arg AR%sT 1999 Oct 3
512 -4:00 Arg AR%sT 2000 Mar 3
513 -3:00 - ART 2004 Jun 1
514 -4:00 - WART 2004 Jun 13
518 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
519 -4:16:48 - CMT 1920 May
521 -4:00 Arg AR%sT 1969 Oct 5
522 -3:00 Arg AR%sT 1991 Mar 1
523 -4:00 - WART 1991 May 7
524 -3:00 Arg AR%sT 1999 Oct 3
525 -4:00 Arg AR%sT 2000 Mar 3
526 -3:00 - ART 2004 Jun 1
527 -4:00 - WART 2004 Jun 20
528 -3:00 Arg AR%sT 2008 Oct 18
532 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
533 -4:16:48 - CMT 1920 May
535 -4:00 Arg AR%sT 1969 Oct 5
536 -3:00 Arg AR%sT 1991 Mar 1
537 -4:00 - WART 1991 May 7
538 -3:00 Arg AR%sT 1999 Oct 3
539 -4:00 Arg AR%sT 2000 Mar 3
540 -3:00 - ART 2004 May 31
541 -4:00 - WART 2004 Jul 25
542 -3:00 Arg AR%sT 2008 Oct 18
546 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
547 -4:16:48 - CMT 1920 May
549 -4:00 Arg AR%sT 1969 Oct 5
550 -3:00 Arg AR%sT 1990 Mar 4
551 -4:00 - WART 1990 Oct 28
552 -4:00 1:00 WARST 1991 Mar 17
553 -4:00 - WART 1991 Oct 6
555 -3:00 Arg AR%sT 1999 Oct 3
556 -4:00 Arg AR%sT 2000 Mar 3
557 -3:00 Arg AR%sT 2008 Oct 18
560 # Catamarca (CT), Chubut (CH)
561 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
562 -4:16:48 - CMT 1920 May
564 -4:00 Arg AR%sT 1969 Oct 5
565 -3:00 Arg AR%sT 1991 Mar 3
566 -4:00 - WART 1991 Oct 20
567 -3:00 Arg AR%sT 1999 Oct 3
568 -4:00 Arg AR%sT 2000 Mar 3
569 -3:00 - ART 2004 Jun 1
570 -4:00 - WART 2004 Jun 20
571 -3:00 Arg AR%sT 2008 Oct 18
575 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
576 -4:16:48 - CMT 1920 May
578 -4:00 Arg AR%sT 1969 Oct 5
579 -3:00 Arg AR%sT 1990 Mar 4
580 -4:00 - WART 1990 Oct 15
581 -4:00 1:00 WARST 1991 Mar 1
582 -4:00 - WART 1991 Oct 15
583 -4:00 1:00 WARST 1992 Mar 1
584 -4:00 - WART 1992 Oct 18
585 -3:00 Arg AR%sT 1999 Oct 3
586 -4:00 Arg AR%sT 2000 Mar 3
587 -3:00 - ART 2004 May 23
588 -4:00 - WART 2004 Sep 26
589 -3:00 Arg AR%sT 2008 Oct 18
594 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
595 Rule SanLuis 2007 2009 - Oct Sun>=8 0:00 1:00 S
597 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
598 -4:16:48 - CMT 1920 May
600 -4:00 Arg AR%sT 1969 Oct 5
602 -3:00 1:00 ARST 1990 Mar 14
603 -4:00 - WART 1990 Oct 15
604 -4:00 1:00 WARST 1991 Mar 1
605 -4:00 - WART 1991 Jun 1
606 -3:00 - ART 1999 Oct 3
607 -4:00 1:00 WARST 2000 Mar 3
608 -3:00 - ART 2004 May 31
609 -4:00 - WART 2004 Jul 25
610 -3:00 Arg AR%sT 2008 Jan 21
614 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
615 -4:16:48 - CMT 1920 May # Cordoba Mean Time
617 -4:00 Arg AR%sT 1969 Oct 5
618 -3:00 Arg AR%sT 1999 Oct 3
619 -4:00 Arg AR%sT 2000 Mar 3
620 -3:00 - ART 2004 Jun 1
621 -4:00 - WART 2004 Jun 20
622 -3:00 Arg AR%sT 2008 Oct 18
625 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
626 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
627 -4:16:48 - CMT 1920 May # Cordoba Mean Time
629 -4:00 Arg AR%sT 1969 Oct 5
630 -3:00 Arg AR%sT 1999 Oct 3
631 -4:00 Arg AR%sT 2000 Mar 3
632 -3:00 - ART 2004 May 30
633 -4:00 - WART 2004 Jun 20
634 -3:00 Arg AR%sT 2008 Oct 18
638 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
639 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
640 -4:30 - ANT 1965 # Netherlands Antilles Time
644 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
645 Zone America/La_Paz -4:32:36 - LMT 1890
646 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
647 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
648 -4:00 - BOT # Bolivia Time
652 # From Paul Eggert (1993-11-18):
653 # The mayor of Rio recently attempted to change the time zone rules
654 # just in his city, in order to leave more summer time for the tourist trade.
655 # The rule change lasted only part of the day;
656 # the federal government refused to follow the city's rules, and business
657 # was in a chaos, so the mayor backed down that afternoon.
659 # From IATA SSIM (1996-02):
660 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
661 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
662 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
663 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
664 # [The last three states are new to this issue of the IATA SSIM.]
666 # From Gwillim Law (1996-10-07):
667 # Geography, history (Tocantins was part of Goias until 1989), and other
668 # sources of time zone information lead me to believe that AL, SE, and TO were
669 # always in BR1, and so the only change was whether or not they observed DST....
670 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
671 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
672 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
673 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
674 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
675 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
676 # become part of the state of Pernambuco). The boundary between BR1 and BR2
677 # has never been clearly stated. They've simply been called East and West.
678 # However, some conclusions can be drawn from another IATA manual: the Airline
679 # Coding Directory, which lists close to 400 airports in Brazil. For each
680 # airport it gives a time zone which is coded to the SSIM. From that
681 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
682 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
683 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
685 # From Marcos Tadeu (1998-09-27):
686 # <a href="http://pcdsh01.on.br/verao1.html">
687 # Brazilian official page
690 # From Jesper Norgaard (2000-11-03):
691 # [For an official list of which regions in Brazil use which time zones, see:]
692 # http://pcdsh01.on.br/Fusbr.htm
693 # http://pcdsh01.on.br/Fusbrhv.htm
695 # From Celso Doria via David Madeo (2002-10-09):
696 # The reason for the delay this year has to do with elections in Brazil.
698 # Unlike in the United States, elections in Brazil are 100% computerized and
699 # the results are known almost immediately. Yesterday, it was the first
700 # round of the elections when 115 million Brazilians voted for President,
701 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
702 # counting (or re-counting) votes anymore and we know there will be a second
703 # round for the Presidency and also for some Governors. The 2nd round will
704 # take place on October 27th.
706 # The reason why the DST will only begin November 3rd is that the thousands
707 # of electoral machines used cannot have their time changed, and since the
708 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
709 # the Government decided to postpone DST, instead of changing the Constitution
710 # (maybe, for the next elections, it will be possible to change the clock)...
712 # From Rodrigo Severo (2004-10-04):
713 # It's just the biannual change made necessary by the much hyped, supposedly
714 # modern Brazilian eletronic voting machines which, apparently, can't deal
715 # with a time change between the first and the second rounds of the elections.
717 # From Steffen Thorsen (2007-09-20):
718 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
719 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
721 # From Paul Schulze (2008-06-24):
722 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
723 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
724 # effective today (00:00am at June 24, 2008) as follows:
726 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
727 # part of the Amazonas state that had this timezone now being put to the
729 # b) The whole Para state now is put at timezone UTC+3, instead of just
730 # part of it, as was before.
732 # This change follows a proposal of senator Tiao Viana of Acre state, that
733 # proposed it due to concerns about open television channels displaying
734 # programs inappropriate to youths in the states that had the timezone
735 # UTC+5 too early in the night. In the occasion, some more corrections
736 # were proposed, trying to unify the timezones of any given state. This
737 # change modifies timezone rules defined in decree 2.784 of 18 June,
740 # From Rodrigo Severo (2008-06-24):
741 # Just correcting the URL:
742 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
743 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
746 # As a result of the above Decree I believe the America/Rio_Branco
747 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
748 # be created to represent the the west side of the Para State. I
749 # suggest this new timezone be called Santarem as the most
750 # important/populated city in the affected area.
752 # This new timezone would be the same as the Rio_Branco timezone up to
753 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
755 # From Alex Krivenyshev (2008-06-24):
756 # This is a quick reference page for New and Old Brazil Time Zones map.
757 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
758 # http://www.worldtimezone.com/brazil-time-new-old.php
761 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
762 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
763 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
765 # From Paul Eggert (2002-10-10):
766 # The official decrees referenced below are mostly taken from
767 # <a href="http://pcdsh01.on.br/DecHV.html">
768 # Decretos sobre o Horario de Verao no Brasil
771 # From Steffen Thorsen (2008-08-29):
772 # As announced by the government and many newspapers in Brazil late
773 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
774 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
775 # past years experience with the elections, there was a good chance that
776 # the start was postponed to November, but it did not happen this year.
778 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
780 # An official page about it:
781 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
782 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
784 # Note that this link does not always work directly, but must be accessed
786 # <a href="http://www.mme.gov.br/first">
787 # http://www.mme.gov.br/first
790 # One example link that works directly:
791 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
792 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
796 # We have a written a short article about it as well:
797 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
798 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
801 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
802 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
803 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
804 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
805 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
806 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
807 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
809 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
810 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
811 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
812 Rule Brazil 1950 only - Apr 16 1:00 0 -
813 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
814 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
815 Rule Brazil 1953 only - Mar 1 0:00 0 -
816 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
818 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
819 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
820 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
821 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
822 # extended the above decree to all of the national territory on 12-09.
823 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
824 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
825 # extended summer time by one day to 1964-03-01 00:00 (start of school).
826 Rule Brazil 1964 only - Mar 1 0:00 0 -
827 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
828 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
829 Rule Brazil 1965 only - Mar 31 0:00 0 -
830 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
831 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
832 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
833 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
834 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
835 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
837 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
838 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
839 # Decree 92,310 (1986-01-21)
840 # Decree 92,463 (1986-03-13)
841 Rule Brazil 1986 only - Mar 15 0:00 0 -
842 # Decree 93,316 (1986-10-01)
843 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
844 Rule Brazil 1987 only - Feb 14 0:00 0 -
845 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
846 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
847 Rule Brazil 1988 only - Feb 7 0:00 0 -
848 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
849 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
850 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
851 Rule Brazil 1989 only - Jan 29 0:00 0 -
852 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
853 # with the same exceptions
854 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
855 Rule Brazil 1990 only - Feb 11 0:00 0 -
856 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
857 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
858 # Decree 99,629 (1990-10-19) adds BA, MT.
859 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
860 Rule Brazil 1991 only - Feb 17 0:00 0 -
861 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
862 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
863 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
864 Rule Brazil 1992 only - Feb 9 0:00 0 -
865 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
866 # adopted by same states.
867 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
868 Rule Brazil 1993 only - Jan 31 0:00 0 -
869 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
870 # adopted by same states, plus AM.
871 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
872 # web page corrected 2004-01-07) adopted by same states, minus AM.
873 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
874 # adopted by same states, plus MT and TO.
875 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
877 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
878 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
879 Rule Brazil 1996 only - Feb 11 0:00 0 -
880 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
881 # adopted by same states, minus AL, SE.
882 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
883 Rule Brazil 1997 only - Feb 16 0:00 0 -
884 # From Daniel C. Sobral (1998-02-12):
885 # In 1997, the DS began on October 6. The stated reason was that
886 # because international television networks ignored Brazil's policy on DS,
887 # they bought the wrong times on satellite for coverage of Pope's visit.
888 # This year, the ending date of DS was postponed to March 1
889 # to help dealing with the shortages of electric power.
891 # Decree 2,317 (1997-09-04), adopted by same states.
892 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
893 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
895 Rule Brazil 1998 only - Mar 1 0:00 0 -
896 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
897 # adopted by the same states as before.
898 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
899 Rule Brazil 1999 only - Feb 21 0:00 0 -
900 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
901 # (1999-08-23) adopted by same states.
902 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
903 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
904 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
905 Rule Brazil 2000 only - Feb 27 0:00 0 -
906 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
907 # adopted by the same states as before.
908 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
909 # repeals DST in PE and RR, effective 2000-10-15 00:00.
910 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
911 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
912 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
913 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
914 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
915 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
916 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
917 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
918 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
919 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
920 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
921 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
922 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
923 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
924 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
925 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
926 # adopted by the same states as before.
927 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
928 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
929 # adopted by the same states as before.
930 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
931 Rule Brazil 2007 only - Feb 25 0:00 0 -
932 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
933 # adopted by the same states as before.
934 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
935 # From Frederico A. C. Neves (2008-09-10):
936 # Acording to this decree
937 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
938 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
940 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
941 # 3rd Feb Sunday. There is an exception on the return date when this is
942 # the Carnival Sunday then the return date will be the next Sunday...
943 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
944 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
945 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
946 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
947 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
948 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
949 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
950 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
951 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
952 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
953 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
954 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
955 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
956 # From Arthur David Olson (2008-09-29):
957 # The next is wrong in some years but is better than nothing.
958 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
960 # The latest ruleset listed above says that the following states observe DST:
961 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
963 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
965 # Fernando de Noronha (administratively part of PE)
966 Zone America/Noronha -2:09:40 - LMT 1914
967 -2:00 Brazil FN%sT 1990 Sep 17
968 -2:00 - FNT 1999 Sep 30
969 -2:00 Brazil FN%sT 2000 Oct 15
970 -2:00 - FNT 2001 Sep 13
971 -2:00 Brazil FN%sT 2002 Oct 1
973 # Other Atlantic islands have no permanent settlement.
974 # These include Trindade and Martin Vaz (administratively part of ES),
975 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
976 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
977 # it also included the Penedos.
979 # Amapa (AP), east Para (PA)
980 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
981 # The division between east and west Para is the river Xingu.
982 # In the north a very small part from the river Javary (now Jari I guess,
983 # the border with Amapa) to the Amazon, then to the Xingu.
984 Zone America/Belem -3:13:56 - LMT 1914
985 -3:00 Brazil BR%sT 1988 Sep 12
989 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
990 Zone America/Santarem -3:38:48 - LMT 1914
991 -4:00 Brazil AM%sT 1988 Sep 12
992 -4:00 - AMT 2008 Jun 24 00:00
995 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
997 Zone America/Fortaleza -2:34:00 - LMT 1914
998 -3:00 Brazil BR%sT 1990 Sep 17
999 -3:00 - BRT 1999 Sep 30
1000 -3:00 Brazil BR%sT 2000 Oct 22
1001 -3:00 - BRT 2001 Sep 13
1002 -3:00 Brazil BR%sT 2002 Oct 1
1005 # Pernambuco (PE) (except Atlantic islands)
1006 Zone America/Recife -2:19:36 - LMT 1914
1007 -3:00 Brazil BR%sT 1990 Sep 17
1008 -3:00 - BRT 1999 Sep 30
1009 -3:00 Brazil BR%sT 2000 Oct 15
1010 -3:00 - BRT 2001 Sep 13
1011 -3:00 Brazil BR%sT 2002 Oct 1
1015 Zone America/Araguaina -3:12:48 - LMT 1914
1016 -3:00 Brazil BR%sT 1990 Sep 17
1017 -3:00 - BRT 1995 Sep 14
1018 -3:00 Brazil BR%sT 2003 Sep 24
1021 # Alagoas (AL), Sergipe (SE)
1022 Zone America/Maceio -2:22:52 - LMT 1914
1023 -3:00 Brazil BR%sT 1990 Sep 17
1024 -3:00 - BRT 1995 Oct 13
1025 -3:00 Brazil BR%sT 1996 Sep 4
1026 -3:00 - BRT 1999 Sep 30
1027 -3:00 Brazil BR%sT 2000 Oct 22
1028 -3:00 - BRT 2001 Sep 13
1029 -3:00 Brazil BR%sT 2002 Oct 1
1033 # There are too many Salvadors elsewhere, so use America/Bahia instead
1034 # of America/Salvador.
1035 Zone America/Bahia -2:34:04 - LMT 1914
1036 -3:00 Brazil BR%sT 2003 Sep 24
1039 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
1040 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
1041 # Santa Catarina (SC), Rio Grande do Sul (RS)
1042 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1043 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1044 -3:00 1:00 BRST 1964
1047 # Mato Grosso do Sul (MS)
1048 Zone America/Campo_Grande -3:38:28 - LMT 1914
1052 Zone America/Cuiaba -3:44:20 - LMT 1914
1053 -4:00 Brazil AM%sT 2003 Sep 24
1054 -4:00 - AMT 2004 Oct 1
1058 Zone America/Porto_Velho -4:15:36 - LMT 1914
1059 -4:00 Brazil AM%sT 1988 Sep 12
1063 Zone America/Boa_Vista -4:02:40 - LMT 1914
1064 -4:00 Brazil AM%sT 1988 Sep 12
1065 -4:00 - AMT 1999 Sep 30
1066 -4:00 Brazil AM%sT 2000 Oct 15
1069 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1070 # The great circle line from Tabatinga to Porto Acre divides
1071 # east from west Amazonas.
1072 Zone America/Manaus -4:00:04 - LMT 1914
1073 -4:00 Brazil AM%sT 1988 Sep 12
1074 -4:00 - AMT 1993 Sep 28
1075 -4:00 Brazil AM%sT 1994 Sep 22
1078 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1079 # Eirunepe, Envira, Ipixuna
1080 Zone America/Eirunepe -4:39:28 - LMT 1914
1081 -5:00 Brazil AC%sT 1988 Sep 12
1082 -5:00 - ACT 1993 Sep 28
1083 -5:00 Brazil AC%sT 1994 Sep 22
1084 -5:00 - ACT 2008 Jun 24 00:00
1088 Zone America/Rio_Branco -4:31:12 - LMT 1914
1089 -5:00 Brazil AC%sT 1988 Sep 12
1090 -5:00 - ACT 2008 Jun 24 00:00
1095 # From Eduardo Krell (1995-10-19):
1096 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1097 # of October.... The law is the same for March and October.
1099 # Because of the drought this year, the government decided to go into
1100 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1101 # (unless there's another dry season next year, I guess).
1103 # From Julio I. Pacheco Troncoso (1999-03-18):
1104 # Because of the same drought, the government decided to end DST later,
1105 # on April 3, (one-time change).
1107 # From Oscar van Vlijmen (2006-10-08):
1108 # http://www.horaoficial.cl/cambio.htm
1110 # From Jesper Norgaard Welen (2006-10-08):
1111 # I think that there are some obvious mistakes in the suggested link
1112 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1113 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1114 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1115 # anyhow it clears up some doubts too.
1117 # From Paul Eggert (2006-12-27):
1118 # The following data for Chile and America/Santiago are from
1119 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1120 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1121 # & Pottenger, except with DST transitions after 1932 cloned from
1122 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1123 # but we have no other source.
1125 # From German Poo-Caaman~o (2008-03-03):
1126 # Due to drought, Chile extends Daylight Time in three weeks. This
1127 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1128 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1129 # The Supreme Decree is located at
1130 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1131 # http://www.shoa.cl/servicios/supremo316.pdf
1133 # and the instructions for 2008 are located in:
1134 # <a href="http://www.horaoficial.cl/cambio.htm">
1135 # http://www.horaoficial.cl/cambio.htm
1138 # From Jose Miguel Garrido (2008-03-05):
1140 # You could see the announces of the change on
1141 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1142 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1145 # From Angel Chiang (2010-03-04):
1146 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1147 # <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098">
1148 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1150 # (in Spanish, last paragraph).
1152 # This is breaking news. There should be more information available later.
1154 # From Arthur Daivd Olson (2010-03-06):
1155 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1157 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1158 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1159 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1160 Rule Chile 1942 only - Jun 1 4:00u 0 -
1161 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1162 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1163 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1164 Rule Chile 1947 only - Apr 1 4:00u 0 -
1165 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1166 Rule Chile 1969 only - Mar 30 3:00u 0 -
1167 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1168 Rule Chile 1970 only - Mar 29 3:00u 0 -
1169 Rule Chile 1971 only - Mar 14 3:00u 0 -
1170 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1171 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1172 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1173 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1174 Rule Chile 1987 only - Apr 12 3:00u 0 -
1175 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1176 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1177 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1178 Rule Chile 1990 only - Mar 18 3:00u 0 -
1179 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1180 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1181 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1182 Rule Chile 1997 only - Mar 30 3:00u 0 -
1183 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1184 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1185 Rule Chile 1999 only - Apr 4 3:00u 0 -
1186 Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
1187 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1188 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1189 # which is used below in specifying the transition.
1190 Rule Chile 2008 only - Mar 30 3:00u 0 -
1191 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1192 Rule Chile 2010 only - Apr 4 3:00u 0 -
1193 Rule Chile 2011 max - Mar Sun>=9 3:00u 0 -
1194 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1195 # (1996-09) says 1998-03-08. Ignore these.
1196 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1197 Zone America/Santiago -4:42:46 - LMT 1890
1198 -4:42:46 - SMT 1910 # Santiago Mean Time
1199 -5:00 - CLT 1916 Jul 1 # Chile Time
1200 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1201 -4:00 - CLT 1919 Jul 1 # Chile Time
1202 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1203 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1205 Zone Pacific/Easter -7:17:44 - LMT 1890
1206 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1207 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1210 # Sala y Gomez Island is like Pacific/Easter.
1211 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1212 # San Felix, and Antarctic bases, are like America/Santiago.
1215 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1216 Rule CO 1992 only - May 3 0:00 1:00 S
1217 Rule CO 1993 only - Apr 4 0:00 0 -
1218 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1219 Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1220 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1221 -5:00 CO CO%sT # Colombia Time
1222 # Malpelo, Providencia, San Andres
1223 # no information; probably like America/Bogota
1227 # From Paul Eggert (2006-03-22):
1228 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1229 # -4:00 since standard time was introduced on 1912-03-02; and that
1230 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1231 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1232 # Saba Island has been like Curacao.
1233 # This all predates our 1970 cutoff, though.
1235 # By July 2007 Curacao and St Maarten are planned to become
1236 # associated states within the Netherlands, much like Aruba;
1237 # Bonaire, Saba and St Eustatius would become directly part of the
1238 # Netherlands as Kingdom Islands. This won't affect their time zones
1239 # though, as far as we know.
1241 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1242 Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1243 -4:30 - ANT 1965 # Netherlands Antilles Time
1248 # From Paul Eggert (2007-03-04):
1249 # Apparently Ecuador had a failed experiment with DST in 1992.
1250 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1251 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1252 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1254 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1255 Zone America/Guayaquil -5:19:20 - LMT 1890
1256 -5:14:00 - QMT 1931 # Quito Mean Time
1257 -5:00 - ECT # Ecuador Time
1258 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1260 -6:00 - GALT # Galapagos Time
1264 # From Paul Eggert (2006-03-22):
1265 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1266 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1268 # From Falkland Islands Government Office, London (2001-01-22)
1269 # via Jesper Norgaard:
1270 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1271 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1272 # September. It is anticipated that the clocks will revert back at 2
1273 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1274 # Sunday 1 September.
1276 # From Rives McDow (2001-02-13):
1278 # I have communicated several times with people there, and the last
1279 # time I had communications that was helpful was in 1998. Here is
1280 # what was said then:
1282 # "The general rule was that Stanley used daylight saving and the Camp
1283 # did not. However for various reasons many people in the Camp have
1284 # started to use daylight saving (known locally as 'Stanley Time')
1285 # There is no rule as to who uses daylight saving - it is a matter of
1286 # personal choice and so it is impossible to draw a map showing who
1287 # uses it and who does not. Any list would be out of date as soon as
1288 # it was produced. This year daylight saving ended on April 18/19th
1289 # and started again on September 12/13th. I do not know what the rule
1290 # is, but can find out if you like. We do not change at the same time
1293 # I did have in my notes that the rule was "Second Saturday in Sep at
1294 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1295 # not agree in some cases with Shanks; is this true?
1297 # Also, there is no mention in the list that some areas in the
1298 # Falklands do not use DST. I have found in my communications there
1299 # that these areas are on the western half of East Falkland and all of
1300 # West Falkland. Stanley is the only place that consistently observes
1301 # DST. Again, as in other places in the world, the farmers don't like
1302 # it. West Falkland is almost entirely sheep farmers.
1304 # I know one lady there that keeps a list of which farm keeps DST and
1305 # which doesn't each year. She runs a shop in Stanley, and says that
1306 # the list changes each year. She uses it to communicate to her
1307 # customers, catching them when they are home for lunch or dinner.
1309 # From Paul Eggert (2001-03-05):
1310 # For now, we'll just record the time in Stanley, since we have no
1313 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1314 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1315 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1316 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1317 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1318 Rule Falk 1943 only - Jan 1 0:00 0 -
1319 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1320 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1321 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1322 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1323 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1324 Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1325 Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1326 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1327 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1328 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1329 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1330 -3:00 Falk FK%sT 1985 Sep 15
1334 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1335 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1336 -4:00 - GFT 1967 Oct # French Guiana Time
1340 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1341 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1342 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1343 -3:45 - GYT 1975 Jul 31 # Guyana Time
1345 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1349 # From Paul Eggert (2006-03-22):
1350 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1351 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1352 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1353 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1354 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1355 Rule Para 1975 1978 - Mar 1 0:00 0 -
1356 Rule Para 1979 1991 - Apr 1 0:00 0 -
1357 Rule Para 1989 only - Oct 22 0:00 1:00 S
1358 Rule Para 1990 only - Oct 1 0:00 1:00 S
1359 Rule Para 1991 only - Oct 6 0:00 1:00 S
1360 Rule Para 1992 only - Mar 1 0:00 0 -
1361 Rule Para 1992 only - Oct 5 0:00 1:00 S
1362 Rule Para 1993 only - Mar 31 0:00 0 -
1363 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1364 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1365 Rule Para 1996 only - Mar 1 0:00 0 -
1366 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1367 # From Steffen Thorsen (2000-10-02):
1368 # I have three independent reports that Paraguay changed to DST this Sunday
1371 # Translated by Gwillim Law (2001-02-27) from
1372 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1373 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1375 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1376 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1377 # system has been operating for several years. Formerly there was a separate
1378 # decree each year; the new law has the same effect, but permanently. Every
1379 # year, the time will change on the first Sunday of October; likewise, the
1380 # clock will be set back on the first Sunday of March.
1382 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1383 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1384 Rule Para 1997 only - Feb lastSun 0:00 0 -
1385 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1386 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1387 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1388 # From Rives McDow (2002-02-28):
1389 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1390 # dst method to be from the first Sunday in September to the first Sunday in
1392 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1393 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1395 # From Jesper Norgaard Welen (2005-01-02):
1396 # There are several sources that claim that Paraguay made
1397 # a timezone rule change in autumn 2004.
1398 # From Steffen Thorsen (2005-01-05):
1399 # Decree 1,867 (2004-03-05)
1400 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1401 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1402 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1403 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1404 # From Carlos Raul Perasso (2010-02-18):
1405 # By decree number 3958 issued yesterday (
1406 # <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf">
1407 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1410 # Paraguay changes its DST schedule, postponing the March rule to April and
1411 # modifying the October date. The decree reads:
1413 # Art. 1. It is hereby established that from the second Sunday of the month of
1414 # April of this year (2010), the official time is to be set back 60 minutes,
1415 # and that on the first Sunday of the month of October, it is to be set
1416 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1418 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1419 Rule Para 2010 max - Apr Sun>=8 0:00 0 -
1421 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1422 Zone America/Asuncion -3:50:40 - LMT 1890
1423 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1424 -4:00 - PYT 1972 Oct # Paraguay Time
1425 -3:00 - PYT 1974 Apr
1430 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1431 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1432 # When we were in Peru in 1985-1986, they apparently switched over
1433 # sometime between December 29 and January 3 while we were on the Amazon.
1435 # From Paul Eggert (2006-03-22):
1436 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1438 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1439 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1440 Rule Peru 1938 only - Apr 1 0:00 0 -
1441 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1442 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1443 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1444 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1445 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1446 Rule Peru 1990 only - Apr 1 0:00 0 -
1447 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1448 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1449 Rule Peru 1994 only - Apr 1 0:00 0 -
1450 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1451 Zone America/Lima -5:08:12 - LMT 1890
1452 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1453 -5:00 Peru PE%sT # Peru Time
1456 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1457 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1458 -2:00 - GST # South Georgia Time
1461 # uninhabited; scientific personnel have wintered
1464 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1465 Zone America/Paramaribo -3:40:40 - LMT 1911
1466 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1467 -3:40:36 - PMT 1945 Oct # The capital moved?
1468 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1469 -3:30 - SRT 1984 Oct # Suriname Time
1472 # Trinidad and Tobago
1473 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1474 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1478 # From Paul Eggert (1993-11-18):
1479 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1480 # From Shanks & Pottenger:
1481 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1482 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1483 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1484 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1485 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1486 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1487 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1488 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1489 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1490 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1491 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1492 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1493 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1494 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1495 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1496 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1497 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1498 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1499 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1500 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1501 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1502 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1503 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1504 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1505 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1506 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1507 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1508 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1509 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1510 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1511 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1512 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1513 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1514 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1515 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1516 Rule Uruguay 1980 only - May 1 0:00 0 -
1517 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1518 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1519 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1520 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1521 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1522 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1523 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1524 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1525 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1526 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1527 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1528 # From Eduardo Cota (2004-09-20):
1529 # The uruguayan government has decreed a change in the local time....
1530 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1531 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1532 # From Steffen Thorsen (2005-03-11):
1533 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1534 # save energy ... it was postponed two weeks....
1535 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1536 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1537 # From Eduardo Cota (2005-09-27):
1538 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1539 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1540 # 02:00 local time, official time in Uruguay will be at GMT -2.
1541 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1542 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1543 # From Jesper Norgaard Welen (2006-09-06):
1544 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1545 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1546 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1547 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1548 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1549 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1550 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1555 # From John Stainforth (2007-11-28):
1556 # ... the change for Venezuela originally expected for 2007-12-31 has
1557 # been brought forward to 2007-12-09. The official announcement was
1558 # published today in the "Gaceta Oficial de la Republica Bolivariana
1559 # de Venezuela, numero 38.819" (official document for all laws or
1560 # resolution publication)
1561 # http://www.globovision.com/news.php?nid=72208
1563 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1564 Zone America/Caracas -4:27:44 - LMT 1890
1565 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1566 -4:30 - VET 1965 # Venezuela Time
1567 -4:00 - VET 2007 Dec 9 03:00
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