| blob | 7a0f3ecd37996377e8da0a465a5dee84397ab3d3 |
1 # <pre>
2 # @(#)southamerica 8.40
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).
14 #
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.
20 #
21 # Except where otherwise noted, Shanks & Pottenger is the source for
22 # entries through 1990, and IATA SSIM is the source for entries afterwards.
23 #
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
32 #
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!
45 # std dst
46 # -2:00 FNT FNST Fernando de Noronha
47 # -3:00 BRT BRST Brasilia
48 # -4:00 AMT AMST Amazon
49 # -5:00 ACT ACST Acre
51 ###############################################################################
53 ###############################################################################
55 # Argentina
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
91 #
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
99 #
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.
104 #
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 -
115 #
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.
120 #
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.
125 #
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....
135 #
136 # (2001-06-12):
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
140 #
141 # (2001-06-25):
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.
148 #
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.
155 #
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
164 # </a>
165 #
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.
173 #
174 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
175 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
176 # </a>
177 # OR
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)
180 # </a>
182 # From Rodrigo Severo (2008-10-06):
183 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
184 # ...
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
191 # </a>
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
195 # </a>
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
203 # </a>
204 #
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
210 # </a>
211 #
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
216 # </a>
218 # From fullinet (2009-10-18):
219 # As announced in
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
222 # </a>
223 # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
224 #
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.
243 #
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.
250 #
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
255 #
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.
260 #
261 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
262 # Tierra del Fuego, Tucuman.
263 #
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....
268 #
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.
281 #
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
287 #
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:
299 #
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
302 # country)
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
305 # </a>
306 #
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
311 # </a>
312 #
313 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
314 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
315 # </a>
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
321 # </a>
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.
327 #
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."
338 #
339 # You can use
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
342 # </a>
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).
353 #
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...
374 #
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
378 # </a>
379 # (I couldn't find the decree, but
380 # <a href="http://www.sanluis.gov.ar">
381 # www.sanluis.gov.ar
382 # <a/>
383 # is the official page for the Province Government).
384 #
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
388 # </a>
389 #
390 # The press release says:
391 # (...) anunció que el próximo domingo a las 00:00 los puntanos deberán
392 # atrasar una hora sus relojes.
393 #
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
401 #
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.
408 #
409 # The Law at
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
412 # </a>
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.
417 #
418 # This clearly breaks every time the 1st of March or October is a Sunday.
419 #
420 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
421 # Sunday of October and March.
422 #
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.
426 #
427 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
428 # (October 11th) at 0:00.
429 #
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...
432 #
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".
438 # ...
440 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
441 #
442 # Buenos Aires (BA), Capital Federal (CF),
443 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
444 -4:16:48 - CMT 1920 May # Cordoba Mean Time
445 -4:00 - ART 1930 Dec
446 -4:00 Arg AR%sT 1969 Oct 5
447 -3:00 Arg AR%sT 1999 Oct 3
448 -4:00 Arg AR%sT 2000 Mar 3
449 -3:00 Arg AR%sT
450 #
451 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
452 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
453 #
454 # Shanks & Pottenger also make the following claims, which we haven't verified:
455 # - Formosa switched to -3:00 on 1991-01-07.
456 # - Misiones switched to -3:00 on 1990-12-29.
457 # - Chaco switched to -3:00 on 1991-01-04.
458 # - Santiago del Estero switched to -4:00 on 1991-04-01,
459 # then to -3:00 on 1991-04-26.
460 #
461 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
462 -4:16:48 - CMT 1920 May
463 -4:00 - ART 1930 Dec
464 -4:00 Arg AR%sT 1969 Oct 5
465 -3:00 Arg AR%sT 1991 Mar 3
466 -4:00 - WART 1991 Oct 20
467 -3:00 Arg AR%sT 1999 Oct 3
468 -4:00 Arg AR%sT 2000 Mar 3
469 -3:00 Arg AR%sT
470 #
471 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
472 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
473 -4:16:48 - CMT 1920 May
474 -4:00 - ART 1930 Dec
475 -4:00 Arg AR%sT 1969 Oct 5
476 -3:00 Arg AR%sT 1991 Mar 3
477 -4:00 - WART 1991 Oct 20
478 -3:00 Arg AR%sT 1999 Oct 3
479 -4:00 Arg AR%sT 2000 Mar 3
480 -3:00 Arg AR%sT 2008 Oct 18
481 -3:00 - ART
482 #
483 # Tucuman (TM)
484 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
485 -4:16:48 - CMT 1920 May
486 -4:00 - ART 1930 Dec
487 -4:00 Arg AR%sT 1969 Oct 5
488 -3:00 Arg AR%sT 1991 Mar 3
489 -4:00 - WART 1991 Oct 20
490 -3:00 Arg AR%sT 1999 Oct 3
491 -4:00 Arg AR%sT 2000 Mar 3
492 -3:00 - ART 2004 Jun 1
493 -4:00 - WART 2004 Jun 13
494 -3:00 Arg AR%sT
495 #
496 # La Rioja (LR)
497 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
498 -4:16:48 - CMT 1920 May
499 -4:00 - ART 1930 Dec
500 -4:00 Arg AR%sT 1969 Oct 5
501 -3:00 Arg AR%sT 1991 Mar 1
502 -4:00 - WART 1991 May 7
503 -3:00 Arg AR%sT 1999 Oct 3
504 -4:00 Arg AR%sT 2000 Mar 3
505 -3:00 - ART 2004 Jun 1
506 -4:00 - WART 2004 Jun 20
507 -3:00 Arg AR%sT 2008 Oct 18
508 -3:00 - ART
509 #
510 # San Juan (SJ)
511 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
512 -4:16:48 - CMT 1920 May
513 -4:00 - ART 1930 Dec
514 -4:00 Arg AR%sT 1969 Oct 5
515 -3:00 Arg AR%sT 1991 Mar 1
516 -4:00 - WART 1991 May 7
517 -3:00 Arg AR%sT 1999 Oct 3
518 -4:00 Arg AR%sT 2000 Mar 3
519 -3:00 - ART 2004 May 31
520 -4:00 - WART 2004 Jul 25
521 -3:00 Arg AR%sT 2008 Oct 18
522 -3:00 - ART
523 #
524 # Jujuy (JY)
525 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
526 -4:16:48 - CMT 1920 May
527 -4:00 - ART 1930 Dec
528 -4:00 Arg AR%sT 1969 Oct 5
529 -3:00 Arg AR%sT 1990 Mar 4
530 -4:00 - WART 1990 Oct 28
531 -4:00 1:00 WARST 1991 Mar 17
532 -4:00 - WART 1991 Oct 6
533 -3:00 1:00 ARST 1992
534 -3:00 Arg AR%sT 1999 Oct 3
535 -4:00 Arg AR%sT 2000 Mar 3
536 -3:00 Arg AR%sT 2008 Oct 18
537 -3:00 - ART
538 #
539 # Catamarca (CT), Chubut (CH)
540 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
541 -4:16:48 - CMT 1920 May
542 -4:00 - ART 1930 Dec
543 -4:00 Arg AR%sT 1969 Oct 5
544 -3:00 Arg AR%sT 1991 Mar 3
545 -4:00 - WART 1991 Oct 20
546 -3:00 Arg AR%sT 1999 Oct 3
547 -4:00 Arg AR%sT 2000 Mar 3
548 -3:00 - ART 2004 Jun 1
549 -4:00 - WART 2004 Jun 20
550 -3:00 Arg AR%sT 2008 Oct 18
551 -3:00 - ART
552 #
553 # Mendoza (MZ)
554 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
555 -4:16:48 - CMT 1920 May
556 -4:00 - ART 1930 Dec
557 -4:00 Arg AR%sT 1969 Oct 5
558 -3:00 Arg AR%sT 1990 Mar 4
559 -4:00 - WART 1990 Oct 15
560 -4:00 1:00 WARST 1991 Mar 1
561 -4:00 - WART 1991 Oct 15
562 -4:00 1:00 WARST 1992 Mar 1
563 -4:00 - WART 1992 Oct 18
564 -3:00 Arg AR%sT 1999 Oct 3
565 -4:00 Arg AR%sT 2000 Mar 3
566 -3:00 - ART 2004 May 23
567 -4:00 - WART 2004 Sep 26
568 -3:00 Arg AR%sT 2008 Oct 18
569 -3:00 - ART
570 #
571 # San Luis (SL)
573 Rule SanLuis 2008 max - Mar Sun>=8 0:00 0 -
574 Rule SanLuis 2007 max - Oct Sun>=8 0:00 1:00 S
576 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
577 -4:16:48 - CMT 1920 May
578 -4:00 - ART 1930 Dec
579 -4:00 Arg AR%sT 1969 Oct 5
580 -3:00 Arg AR%sT 1990
581 -3:00 1:00 ARST 1990 Mar 14
582 -4:00 - WART 1990 Oct 15
583 -4:00 1:00 WARST 1991 Mar 1
584 -4:00 - WART 1991 Jun 1
585 -3:00 - ART 1999 Oct 3
586 -4:00 1:00 WARST 2000 Mar 3
587 -3:00 - ART 2004 May 31
588 -4:00 - WART 2004 Jul 25
589 -3:00 Arg AR%sT 2008 Jan 21
590 -4:00 SanLuis WAR%sT
591 #
592 # Santa Cruz (SC)
593 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
594 -4:16:48 - CMT 1920 May # Cordoba Mean Time
595 -4:00 - ART 1930 Dec
596 -4:00 Arg AR%sT 1969 Oct 5
597 -3:00 Arg AR%sT 1999 Oct 3
598 -4:00 Arg AR%sT 2000 Mar 3
599 -3:00 - ART 2004 Jun 1
600 -4:00 - WART 2004 Jun 20
601 -3:00 Arg AR%sT 2008 Oct 18
602 -3:00 - ART
603 #
604 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
605 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
606 -4:16:48 - CMT 1920 May # Cordoba Mean Time
607 -4:00 - ART 1930 Dec
608 -4:00 Arg AR%sT 1969 Oct 5
609 -3:00 Arg AR%sT 1999 Oct 3
610 -4:00 Arg AR%sT 2000 Mar 3
611 -3:00 - ART 2004 May 30
612 -4:00 - WART 2004 Jun 20
613 -3:00 Arg AR%sT 2008 Oct 18
614 -3:00 - ART
616 # Aruba
617 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
618 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
619 -4:30 - ANT 1965 # Netherlands Antilles Time
620 -4:00 - AST
622 # Bolivia
623 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
624 Zone America/La_Paz -4:32:36 - LMT 1890
625 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
626 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
627 -4:00 - BOT # Bolivia Time
629 # Brazil
631 # From Paul Eggert (1993-11-18):
632 # The mayor of Rio recently attempted to change the time zone rules
633 # just in his city, in order to leave more summer time for the tourist trade.
634 # The rule change lasted only part of the day;
635 # the federal government refused to follow the city's rules, and business
636 # was in a chaos, so the mayor backed down that afternoon.
638 # From IATA SSIM (1996-02):
639 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
640 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
641 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
642 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
643 # [The last three states are new to this issue of the IATA SSIM.]
645 # From Gwillim Law (1996-10-07):
646 # Geography, history (Tocantins was part of Goias until 1989), and other
647 # sources of time zone information lead me to believe that AL, SE, and TO were
648 # always in BR1, and so the only change was whether or not they observed DST....
649 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
650 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
651 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
652 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
653 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
654 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
655 # become part of the state of Pernambuco). The boundary between BR1 and BR2
656 # has never been clearly stated. They've simply been called East and West.
657 # However, some conclusions can be drawn from another IATA manual: the Airline
658 # Coding Directory, which lists close to 400 airports in Brazil. For each
659 # airport it gives a time zone which is coded to the SSIM. From that
660 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
661 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
662 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
664 # From Marcos Tadeu (1998-09-27):
665 # <a href="http://pcdsh01.on.br/verao1.html">
666 # Brazilian official page
667 # </a>
669 # From Jesper Norgaard (2000-11-03):
670 # [For an official list of which regions in Brazil use which time zones, see:]
671 # http://pcdsh01.on.br/Fusbr.htm
672 # http://pcdsh01.on.br/Fusbrhv.htm
674 # From Celso Doria via David Madeo (2002-10-09):
675 # The reason for the delay this year has to do with elections in Brazil.
676 #
677 # Unlike in the United States, elections in Brazil are 100% computerized and
678 # the results are known almost immediately. Yesterday, it was the first
679 # round of the elections when 115 million Brazilians voted for President,
680 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
681 # counting (or re-counting) votes anymore and we know there will be a second
682 # round for the Presidency and also for some Governors. The 2nd round will
683 # take place on October 27th.
684 #
685 # The reason why the DST will only begin November 3rd is that the thousands
686 # of electoral machines used cannot have their time changed, and since the
687 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
688 # the Government decided to postpone DST, instead of changing the Constitution
689 # (maybe, for the next elections, it will be possible to change the clock)...
691 # From Rodrigo Severo (2004-10-04):
692 # It's just the biannual change made necessary by the much hyped, supposedly
693 # modern Brazilian eletronic voting machines which, apparently, can't deal
694 # with a time change between the first and the second rounds of the elections.
696 # From Steffen Thorsen (2007-09-20):
697 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
698 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
700 # From Paul Schulze (2008-06-24):
701 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
702 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
703 # effective today (00:00am at June 24, 2008) as follows:
704 #
705 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
706 # part of the Amazonas state that had this timezone now being put to the
707 # timezone UTC+4
708 # b) The whole Para state now is put at timezone UTC+3, instead of just
709 # part of it, as was before.
710 #
711 # This change follows a proposal of senator Tiao Viana of Acre state, that
712 # proposed it due to concerns about open television channels displaying
713 # programs inappropriate to youths in the states that had the timezone
714 # UTC+5 too early in the night. In the occasion, some more corrections
715 # were proposed, trying to unify the timezones of any given state. This
716 # change modifies timezone rules defined in decree 2.784 of 18 June,
717 # 1913.
719 # From Rodrigo Severo (2008-06-24):
720 # Just correcting the URL:
721 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
722 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
723 # </a>
724 #
725 # As a result of the above Decree I believe the America/Rio_Branco
726 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
727 # be created to represent the the west side of the Para State. I
728 # suggest this new timezone be called Santarem as the most
729 # important/populated city in the affected area.
730 #
731 # This new timezone would be the same as the Rio_Branco timezone up to
732 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
734 # From Alex Krivenyshev (2008-06-24):
735 # This is a quick reference page for New and Old Brazil Time Zones map.
736 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
737 # http://www.worldtimezone.com/brazil-time-new-old.php
738 # </a>
739 #
740 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
741 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
742 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
744 # From Paul Eggert (2002-10-10):
745 # The official decrees referenced below are mostly taken from
746 # <a href="http://pcdsh01.on.br/DecHV.html">
747 # Decretos sobre o Horario de Verao no Brasil
748 # </a>.
750 # From Steffen Thorsen (2008-08-29):
751 # As announced by the government and many newspapers in Brazil late
752 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
753 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
754 # past years experience with the elections, there was a good chance that
755 # the start was postponed to November, but it did not happen this year.
756 #
757 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
758 #
759 # An official page about it:
760 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
761 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
762 # </a>
763 # Note that this link does not always work directly, but must be accessed
764 # by going to
765 # <a href="http://www.mme.gov.br/first">
766 # http://www.mme.gov.br/first
767 # </a>
768 #
769 # One example link that works directly:
770 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
771 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
772 # (Portuguese)
773 # </a>
774 #
775 # We have a written a short article about it as well:
776 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
777 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
778 # </a>
780 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
781 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
782 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
783 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
784 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
785 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
786 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
787 # revoked DST.
788 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
789 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
790 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
791 Rule Brazil 1950 only - Apr 16 1:00 0 -
792 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
793 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
794 Rule Brazil 1953 only - Mar 1 0:00 0 -
795 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
796 # revoked DST.
797 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
798 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
799 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
800 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
801 # extended the above decree to all of the national territory on 12-09.
802 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
803 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
804 # extended summer time by one day to 1964-03-01 00:00 (start of school).
805 Rule Brazil 1964 only - Mar 1 0:00 0 -
806 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
807 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
808 Rule Brazil 1965 only - Mar 31 0:00 0 -
809 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
810 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
811 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
812 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
813 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
814 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
815 # revoked DST.
816 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
817 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
818 # Decree 92,310 (1986-01-21)
819 # Decree 92,463 (1986-03-13)
820 Rule Brazil 1986 only - Mar 15 0:00 0 -
821 # Decree 93,316 (1986-10-01)
822 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
823 Rule Brazil 1987 only - Feb 14 0:00 0 -
824 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
825 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
826 Rule Brazil 1988 only - Feb 7 0:00 0 -
827 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
828 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
829 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
830 Rule Brazil 1989 only - Jan 29 0:00 0 -
831 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
832 # with the same exceptions
833 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
834 Rule Brazil 1990 only - Feb 11 0:00 0 -
835 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
836 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
837 # Decree 99,629 (1990-10-19) adds BA, MT.
838 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
839 Rule Brazil 1991 only - Feb 17 0:00 0 -
840 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
841 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
842 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
843 Rule Brazil 1992 only - Feb 9 0:00 0 -
844 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
845 # adopted by same states.
846 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
847 Rule Brazil 1993 only - Jan 31 0:00 0 -
848 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
849 # adopted by same states, plus AM.
850 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
851 # web page corrected 2004-01-07) adopted by same states, minus AM.
852 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
853 # adopted by same states, plus MT and TO.
854 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
855 # adds AL, SE.
856 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
857 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
858 Rule Brazil 1996 only - Feb 11 0:00 0 -
859 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
860 # adopted by same states, minus AL, SE.
861 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
862 Rule Brazil 1997 only - Feb 16 0:00 0 -
863 # From Daniel C. Sobral (1998-02-12):
864 # In 1997, the DS began on October 6. The stated reason was that
865 # because international television networks ignored Brazil's policy on DS,
866 # they bought the wrong times on satellite for coverage of Pope's visit.
867 # This year, the ending date of DS was postponed to March 1
868 # to help dealing with the shortages of electric power.
869 #
870 # Decree 2,317 (1997-09-04), adopted by same states.
871 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
872 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
873 # (1998-02-10)
874 Rule Brazil 1998 only - Mar 1 0:00 0 -
875 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
876 # adopted by the same states as before.
877 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
878 Rule Brazil 1999 only - Feb 21 0:00 0 -
879 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
880 # (1999-08-23) adopted by same states.
881 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
882 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
883 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
884 Rule Brazil 2000 only - Feb 27 0:00 0 -
885 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
886 # adopted by the same states as before.
887 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
888 # repeals DST in PE and RR, effective 2000-10-15 00:00.
889 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
890 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
891 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
892 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
893 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
894 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
895 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
896 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
897 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
898 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
899 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
900 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
901 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
902 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
903 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
904 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
905 # adopted by the same states as before.
906 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
907 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
908 # adopted by the same states as before.
909 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
910 Rule Brazil 2007 only - Feb 25 0:00 0 -
911 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
912 # adopted by the same states as before.
913 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
914 # From Frederico A. C. Neves (2008-09-10):
915 # Acording to this decree
916 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
917 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
918 # </a>
919 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
920 # 3rd Feb Sunday. There is an exception on the return date when this is
921 # the Carnival Sunday then the return date will be the next Sunday...
922 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
923 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
924 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
925 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
926 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
927 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
928 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
929 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
930 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
931 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
932 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
933 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
934 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
935 # From Arthur David Olson (2008-09-29):
936 # The next is wrong in some years but is better than nothing.
937 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
939 # The latest ruleset listed above says that the following states observe DST:
940 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
942 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
943 #
944 # Fernando de Noronha (administratively part of PE)
945 Zone America/Noronha -2:09:40 - LMT 1914
946 -2:00 Brazil FN%sT 1990 Sep 17
947 -2:00 - FNT 1999 Sep 30
948 -2:00 Brazil FN%sT 2000 Oct 15
949 -2:00 - FNT 2001 Sep 13
950 -2:00 Brazil FN%sT 2002 Oct 1
951 -2:00 - FNT
952 # Other Atlantic islands have no permanent settlement.
953 # These include Trindade and Martin Vaz (administratively part of ES),
954 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
955 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
956 # it also included the Penedos.
957 #
958 # Amapa (AP), east Para (PA)
959 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
960 # The division between east and west Para is the river Xingu.
961 # In the north a very small part from the river Javary (now Jari I guess,
962 # the border with Amapa) to the Amazon, then to the Xingu.
963 Zone America/Belem -3:13:56 - LMT 1914
964 -3:00 Brazil BR%sT 1988 Sep 12
965 -3:00 - BRT
966 #
967 # west Para (PA)
968 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
969 Zone America/Santarem -3:38:48 - LMT 1914
970 -4:00 Brazil AM%sT 1988 Sep 12
971 -4:00 - AMT 2008 Jun 24 00:00
972 -3:00 - BRT
973 #
974 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
975 # Paraiba (PB)
976 Zone America/Fortaleza -2:34:00 - LMT 1914
977 -3:00 Brazil BR%sT 1990 Sep 17
978 -3:00 - BRT 1999 Sep 30
979 -3:00 Brazil BR%sT 2000 Oct 22
980 -3:00 - BRT 2001 Sep 13
981 -3:00 Brazil BR%sT 2002 Oct 1
982 -3:00 - BRT
983 #
984 # Pernambuco (PE) (except Atlantic islands)
985 Zone America/Recife -2:19:36 - LMT 1914
986 -3:00 Brazil BR%sT 1990 Sep 17
987 -3:00 - BRT 1999 Sep 30
988 -3:00 Brazil BR%sT 2000 Oct 15
989 -3:00 - BRT 2001 Sep 13
990 -3:00 Brazil BR%sT 2002 Oct 1
991 -3:00 - BRT
992 #
993 # Tocantins (TO)
994 Zone America/Araguaina -3:12:48 - LMT 1914
995 -3:00 Brazil BR%sT 1990 Sep 17
996 -3:00 - BRT 1995 Sep 14
997 -3:00 Brazil BR%sT 2003 Sep 24
998 -3:00 - BRT
999 #
1000 # Alagoas (AL), Sergipe (SE)
1001 Zone America/Maceio -2:22:52 - LMT 1914
1002 -3:00 Brazil BR%sT 1990 Sep 17
1003 -3:00 - BRT 1995 Oct 13
1004 -3:00 Brazil BR%sT 1996 Sep 4
1005 -3:00 - BRT 1999 Sep 30
1006 -3:00 Brazil BR%sT 2000 Oct 22
1007 -3:00 - BRT 2001 Sep 13
1008 -3:00 Brazil BR%sT 2002 Oct 1
1009 -3:00 - BRT
1010 #
1011 # Bahia (BA)
1012 # There are too many Salvadors elsewhere, so use America/Bahia instead
1013 # of America/Salvador.
1014 Zone America/Bahia -2:34:04 - LMT 1914
1015 -3:00 Brazil BR%sT 2003 Sep 24
1016 -3:00 - BRT
1017 #
1018 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
1019 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
1020 # Santa Catarina (SC), Rio Grande do Sul (RS)
1021 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1022 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1023 -3:00 1:00 BRST 1964
1024 -3:00 Brazil BR%sT
1025 #
1026 # Mato Grosso do Sul (MS)
1027 Zone America/Campo_Grande -3:38:28 - LMT 1914
1028 -4:00 Brazil AM%sT
1029 #
1030 # Mato Grosso (MT)
1031 Zone America/Cuiaba -3:44:20 - LMT 1914
1032 -4:00 Brazil AM%sT 2003 Sep 24
1033 -4:00 - AMT 2004 Oct 1
1034 -4:00 Brazil AM%sT
1035 #
1036 # Rondonia (RO)
1037 Zone America/Porto_Velho -4:15:36 - LMT 1914
1038 -4:00 Brazil AM%sT 1988 Sep 12
1039 -4:00 - AMT
1040 #
1041 # Roraima (RR)
1042 Zone America/Boa_Vista -4:02:40 - LMT 1914
1043 -4:00 Brazil AM%sT 1988 Sep 12
1044 -4:00 - AMT 1999 Sep 30
1045 -4:00 Brazil AM%sT 2000 Oct 15
1046 -4:00 - AMT
1047 #
1048 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1049 # The great circle line from Tabatinga to Porto Acre divides
1050 # east from west Amazonas.
1051 Zone America/Manaus -4:00:04 - LMT 1914
1052 -4:00 Brazil AM%sT 1988 Sep 12
1053 -4:00 - AMT 1993 Sep 28
1054 -4:00 Brazil AM%sT 1994 Sep 22
1055 -4:00 - AMT
1056 #
1057 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1058 # Eirunepe, Envira, Ipixuna
1059 Zone America/Eirunepe -4:39:28 - LMT 1914
1060 -5:00 Brazil AC%sT 1988 Sep 12
1061 -5:00 - ACT 1993 Sep 28
1062 -5:00 Brazil AC%sT 1994 Sep 22
1063 -5:00 - ACT 2008 Jun 24 00:00
1064 -4:00 - AMT
1065 #
1066 # Acre (AC)
1067 Zone America/Rio_Branco -4:31:12 - LMT 1914
1068 -5:00 Brazil AC%sT 1988 Sep 12
1069 -5:00 - ACT 2008 Jun 24 00:00
1070 -4:00 - AMT
1072 # Chile
1074 # From Eduardo Krell (1995-10-19):
1075 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1076 # of October.... The law is the same for March and October.
1077 # (1998-09-29):
1078 # Because of the drought this year, the government decided to go into
1079 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1080 # (unless there's another dry season next year, I guess).
1082 # From Julio I. Pacheco Troncoso (1999-03-18):
1083 # Because of the same drought, the government decided to end DST later,
1084 # on April 3, (one-time change).
1086 # From Oscar van Vlijmen (2006-10-08):
1087 # http://www.horaoficial.cl/cambio.htm
1089 # From Jesper Norgaard Welen (2006-10-08):
1090 # I think that there are some obvious mistakes in the suggested link
1091 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1092 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1093 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1094 # anyhow it clears up some doubts too.
1096 # From Paul Eggert (2006-12-27):
1097 # The following data for Chile and America/Santiago are from
1098 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1099 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1100 # & Pottenger, except with DST transitions after 1932 cloned from
1101 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1102 # but we have no other source.
1104 # From German Poo-Caaman~o (2008-03-03):
1105 # Due to drought, Chile extends Daylight Time in three weeks. This
1106 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1107 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1108 # The Supreme Decree is located at
1109 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1110 # http://www.shoa.cl/servicios/supremo316.pdf
1111 # </a>
1112 # and the instructions for 2008 are located in:
1113 # <a href="http://www.horaoficial.cl/cambio.htm">
1114 # http://www.horaoficial.cl/cambio.htm
1115 # </a>.
1117 # From Jose Miguel Garrido (2008-03-05):
1118 # ...
1119 # You could see the announces of the change on
1120 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1121 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1122 # </a>.
1124 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1125 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1126 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1127 Rule Chile 1942 only - Jun 1 4:00u 0 -
1128 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1129 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1130 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1131 Rule Chile 1947 only - Apr 1 4:00u 0 -
1132 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1133 Rule Chile 1969 only - Mar 30 3:00u 0 -
1134 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1135 Rule Chile 1970 only - Mar 29 3:00u 0 -
1136 Rule Chile 1971 only - Mar 14 3:00u 0 -
1137 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1138 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1139 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1140 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1141 Rule Chile 1987 only - Apr 12 3:00u 0 -
1142 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1143 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1144 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1145 Rule Chile 1990 only - Mar 18 3:00u 0 -
1146 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1147 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1148 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1149 Rule Chile 1997 only - Mar 30 3:00u 0 -
1150 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1151 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1152 Rule Chile 1999 only - Apr 4 3:00u 0 -
1153 Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
1154 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1155 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1156 # which is used below in specifying the transition.
1157 Rule Chile 2008 only - Mar 30 3:00u 0 -
1158 Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
1159 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1160 # (1996-09) says 1998-03-08. Ignore these.
1161 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1162 Zone America/Santiago -4:42:46 - LMT 1890
1163 -4:42:46 - SMT 1910 # Santiago Mean Time
1164 -5:00 - CLT 1916 Jul 1 # Chile Time
1165 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1166 -4:00 - CLT 1919 Jul 1 # Chile Time
1167 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1168 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1169 -4:00 Chile CL%sT
1170 Zone Pacific/Easter -7:17:44 - LMT 1890
1171 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1172 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1173 -6:00 Chile EAS%sT
1174 #
1175 # Sala y Gomez Island is like Pacific/Easter.
1176 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1177 # San Felix, and Antarctic bases, are like America/Santiago.
1179 # Colombia
1180 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1181 Rule CO 1992 only - May 3 0:00 1:00 S
1182 Rule CO 1993 only - Apr 4 0:00 0 -
1183 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1184 Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1185 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1186 -5:00 CO CO%sT # Colombia Time
1187 # Malpelo, Providencia, San Andres
1188 # no information; probably like America/Bogota
1190 # Curacao
1191 #
1192 # From Paul Eggert (2006-03-22):
1193 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1194 # -4:00 since standard time was introduced on 1912-03-02; and that
1195 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1196 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1197 # Saba Island has been like Curacao.
1198 # This all predates our 1970 cutoff, though.
1199 #
1200 # By July 2007 Curacao and St Maarten are planned to become
1201 # associated states within the Netherlands, much like Aruba;
1202 # Bonaire, Saba and St Eustatius would become directly part of the
1203 # Netherlands as Kingdom Islands. This won't affect their time zones
1204 # though, as far as we know.
1205 #
1206 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1207 Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1208 -4:30 - ANT 1965 # Netherlands Antilles Time
1209 -4:00 - AST
1211 # Ecuador
1212 #
1213 # From Paul Eggert (2007-03-04):
1214 # Apparently Ecuador had a failed experiment with DST in 1992.
1215 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1216 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1217 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1218 #
1219 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1220 Zone America/Guayaquil -5:19:20 - LMT 1890
1221 -5:14:00 - QMT 1931 # Quito Mean Time
1222 -5:00 - ECT # Ecuador Time
1223 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1224 -5:00 - ECT 1986
1225 -6:00 - GALT # Galapagos Time
1227 # Falklands
1229 # From Paul Eggert (2006-03-22):
1230 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1231 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1233 # From Falkland Islands Government Office, London (2001-01-22)
1234 # via Jesper Norgaard:
1235 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1236 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1237 # September. It is anticipated that the clocks will revert back at 2
1238 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1239 # Sunday 1 September.
1241 # From Rives McDow (2001-02-13):
1242 #
1243 # I have communicated several times with people there, and the last
1244 # time I had communications that was helpful was in 1998. Here is
1245 # what was said then:
1246 #
1247 # "The general rule was that Stanley used daylight saving and the Camp
1248 # did not. However for various reasons many people in the Camp have
1249 # started to use daylight saving (known locally as 'Stanley Time')
1250 # There is no rule as to who uses daylight saving - it is a matter of
1251 # personal choice and so it is impossible to draw a map showing who
1252 # uses it and who does not. Any list would be out of date as soon as
1253 # it was produced. This year daylight saving ended on April 18/19th
1254 # and started again on September 12/13th. I do not know what the rule
1255 # is, but can find out if you like. We do not change at the same time
1256 # as UK or Chile."
1257 #
1258 # I did have in my notes that the rule was "Second Saturday in Sep at
1259 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1260 # not agree in some cases with Shanks; is this true?
1261 #
1262 # Also, there is no mention in the list that some areas in the
1263 # Falklands do not use DST. I have found in my communications there
1264 # that these areas are on the western half of East Falkland and all of
1265 # West Falkland. Stanley is the only place that consistently observes
1266 # DST. Again, as in other places in the world, the farmers don't like
1267 # it. West Falkland is almost entirely sheep farmers.
1268 #
1269 # I know one lady there that keeps a list of which farm keeps DST and
1270 # which doesn't each year. She runs a shop in Stanley, and says that
1271 # the list changes each year. She uses it to communicate to her
1272 # customers, catching them when they are home for lunch or dinner.
1274 # From Paul Eggert (2001-03-05):
1275 # For now, we'll just record the time in Stanley, since we have no
1276 # better info.
1278 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1279 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1280 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1281 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1282 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1283 Rule Falk 1943 only - Jan 1 0:00 0 -
1284 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1285 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1286 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1287 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1288 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1289 Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1290 Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1291 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1292 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1293 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1294 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1295 -3:00 Falk FK%sT 1985 Sep 15
1296 -4:00 Falk FK%sT
1298 # French Guiana
1299 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1300 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1301 -4:00 - GFT 1967 Oct # French Guiana Time
1302 -3:00 - GFT
1304 # Guyana
1305 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1306 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1307 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1308 -3:45 - GYT 1975 Jul 31 # Guyana Time
1309 -3:00 - GYT 1991
1310 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1311 -4:00 - GYT
1313 # Paraguay
1314 # From Paul Eggert (2006-03-22):
1315 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1316 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1317 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1318 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1319 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1320 Rule Para 1975 1978 - Mar 1 0:00 0 -
1321 Rule Para 1979 1991 - Apr 1 0:00 0 -
1322 Rule Para 1989 only - Oct 22 0:00 1:00 S
1323 Rule Para 1990 only - Oct 1 0:00 1:00 S
1324 Rule Para 1991 only - Oct 6 0:00 1:00 S
1325 Rule Para 1992 only - Mar 1 0:00 0 -
1326 Rule Para 1992 only - Oct 5 0:00 1:00 S
1327 Rule Para 1993 only - Mar 31 0:00 0 -
1328 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1329 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1330 Rule Para 1996 only - Mar 1 0:00 0 -
1331 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1332 # From Steffen Thorsen (2000-10-02):
1333 # I have three independent reports that Paraguay changed to DST this Sunday
1334 # (10-01).
1335 #
1336 # Translated by Gwillim Law (2001-02-27) from
1337 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1338 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1339 # </a>:
1340 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1341 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1342 # system has been operating for several years. Formerly there was a separate
1343 # decree each year; the new law has the same effect, but permanently. Every
1344 # year, the time will change on the first Sunday of October; likewise, the
1345 # clock will be set back on the first Sunday of March.
1346 #
1347 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1348 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1349 Rule Para 1997 only - Feb lastSun 0:00 0 -
1350 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1351 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1352 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1353 # From Rives McDow (2002-02-28):
1354 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1355 # dst method to be from the first Sunday in September to the first Sunday in
1356 # April.
1357 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1358 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1359 #
1360 # From Jesper Norgaard Welen (2005-01-02):
1361 # There are several sources that claim that Paraguay made
1362 # a timezone rule change in autumn 2004.
1363 # From Steffen Thorsen (2005-01-05):
1364 # Decree 1,867 (2004-03-05)
1365 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1366 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1367 Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1368 Rule Para 2005 max - Mar Sun>=8 0:00 0 -
1370 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1371 Zone America/Asuncion -3:50:40 - LMT 1890
1372 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1373 -4:00 - PYT 1972 Oct # Paraguay Time
1374 -3:00 - PYT 1974 Apr
1375 -4:00 Para PY%sT
1377 # Peru
1378 #
1379 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1380 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1381 # When we were in Peru in 1985-1986, they apparently switched over
1382 # sometime between December 29 and January 3 while we were on the Amazon.
1383 #
1384 # From Paul Eggert (2006-03-22):
1385 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1387 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1388 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1389 Rule Peru 1938 only - Apr 1 0:00 0 -
1390 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1391 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1392 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1393 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1394 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1395 Rule Peru 1990 only - Apr 1 0:00 0 -
1396 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1397 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1398 Rule Peru 1994 only - Apr 1 0:00 0 -
1399 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1400 Zone America/Lima -5:08:12 - LMT 1890
1401 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1402 -5:00 Peru PE%sT # Peru Time
1404 # South Georgia
1405 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1406 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1407 -2:00 - GST # South Georgia Time
1409 # South Sandwich Is
1410 # uninhabited; scientific personnel have wintered
1412 # Suriname
1413 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1414 Zone America/Paramaribo -3:40:40 - LMT 1911
1415 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1416 -3:40:36 - PMT 1945 Oct # The capital moved?
1417 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1418 -3:30 - SRT 1984 Oct # Suriname Time
1419 -3:00 - SRT
1421 # Trinidad and Tobago
1422 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1423 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1424 -4:00 - AST
1426 # Uruguay
1427 # From Paul Eggert (1993-11-18):
1428 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1429 # From Shanks & Pottenger:
1430 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1431 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1432 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1433 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1434 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1435 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1436 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1437 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1438 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1439 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1440 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1441 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1442 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1443 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1444 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1445 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1446 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1447 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1448 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1449 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1450 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1451 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1452 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1453 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1454 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1455 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1456 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1457 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1458 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1459 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1460 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1461 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1462 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1463 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1464 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1465 Rule Uruguay 1980 only - May 1 0:00 0 -
1466 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1467 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1468 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1469 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1470 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1471 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1472 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1473 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1474 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1475 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1476 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1477 # From Eduardo Cota (2004-09-20):
1478 # The uruguayan government has decreed a change in the local time....
1479 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1480 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1481 # From Steffen Thorsen (2005-03-11):
1482 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1483 # save energy ... it was postponed two weeks....
1484 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1485 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1486 # From Eduardo Cota (2005-09-27):
1487 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1488 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1489 # 02:00 local time, official time in Uruguay will be at GMT -2.
1490 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1491 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1492 # From Jesper Norgaard Welen (2006-09-06):
1493 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1494 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1495 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1496 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1497 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1498 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1499 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1500 -3:00 Uruguay UY%sT
1502 # Venezuela
1503 #
1504 # From John Stainforth (2007-11-28):
1505 # ... the change for Venezuela originally expected for 2007-12-31 has
1506 # been brought forward to 2007-12-09. The official announcement was
1507 # published today in the "Gaceta Oficial de la Republica Bolivariana
1508 # de Venezuela, numero 38.819" (official document for all laws or
1509 # resolution publication)
1510 # http://www.globovision.com/news.php?nid=72208
1512 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1513 Zone America/Caracas -4:27:44 - LMT 1890
1514 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1515 -4:30 - VET 1965 # Venezuela Time
1516 -4:00 - VET 2007 Dec 9 03:00
1517 -4:30 - VET