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1 # $OpenBSD: southamerica,v 1.4 1997/01/14 04:36:57 millert Exp $
2 # @(#)southamerica 7.16
3
4 # This data is by no means authoritative; if you think you know better,
5 # go ahead and edit the file (and please send any changes to
6 # tz@elsie.nci.nih.gov for general use in the future).
7
8 # From Paul Eggert <eggert@twinsun.com> (1996-11-22):
9 # A good source for time zone historical data outside the U.S. is
10 # Thomas G. Shanks, The International Atlas (3rd edition),
11 # San Diego: ACS Publications, Inc. (1991).
12 #
13 # Gwillim Law <LAW@encmail.encompass.com> writes that a good source
14 # for recent time zone data is the International Air Transport
15 # Association's Standard Schedules Information Manual (IATA SSIM),
16 # published semiannually. Law sent in several helpful summaries
17 # of the IATA's data after 1990.
18 #
19 # Except where otherwise noted, Shanks is the source for entries through 1990,
20 # and IATA SSIM is the source for entries after 1990.
21 #
22 # The following abbreviations are used in this file.
23 # Corrections are welcome!
24 # std dst
25 # LMT Local Mean Time
26 # -2:00 FST FDT Fernando de Noronha
27 # -3:00 EST EDT Eastern Brazil
28 # -4:00 WST WDT Western Brazil
29 # -4:00 AST ADT Atlantic
30 # -5:00 AST ADT Acre
31 #
32 # See the `africa' file for time zone naming and abbreviation conventions.
33 # Earlier editions of these tables used the North American style (e.g. ARST and
34 # ARDT for Argentine Standard and Daylight Time), but the following quote
35 # suggests that it's better to use European style (e.g. ART and ARST).
36 # I suggest the use of _Summer time_ instead of the more cumbersome
37 # _daylight-saving time_. _Summer time_ seems to be in general use
38 # in Europe and South America.
39 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
40 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
41
42
43 # From Guy Harris:
44 # From Official Airline Guide - Worldwide Edition (1987). Countries not
45 # listed here do not observe DST, according to the OAG. Time zone names
46 # are pure inventions, and none are supplied for countries not observing
47 # DST; updates from natives would be appreciated. The times that DST
48 # starts and ends are based on the assumption that they switch a 2AM just
49 # as everybody else does.
50
51 ###############################################################################
52
53 ###############################################################################
54
55 # Argentina
56
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.
60
61 # From U. S. Naval Observatory (1988-01-199):
62 # ARGENTINA 3 H BEHIND UTC
63
64 # From Hernan G. Otero <hernan@isoft.com.ar> (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.
67
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 1 0:00 0 -
86 Rule Arg 1967 1968 - Oct Sun<=7 0:00 1:00 S
87 Rule Arg 1968 1969 - Apr Sun<=7 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 1974 1976 - Oct Sun<=7 0:00 1:00 S
91 Rule Arg 1975 1977 - Apr Sun<=7 0:00 0 -
92 Rule Arg 1985 only - Nov 2 0:00 1:00 S
93 Rule Arg 1986 only - Mar 14 0:00 0 -
94 Rule Arg 1986 1987 - Oct 25 0:00 1:00 S
95 Rule Arg 1987 only - Feb 13 0:00 0 -
96 Rule Arg 1988 only - Feb 7 0:00 0 -
97 Rule Arg 1988 only - Dec 1 0:00 1:00 S
98 #
99 # From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26):
100 # These corrections were contributed by InterSoft Argentina S.A.,
101 # obtaining the data from the:
102 # Talleres de Hidrografia Naval Argentina
103 # (Argentine Naval Hydrography Institute)
104 #
105 # Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero.
106 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
107 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
108 #
109 # From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26):
110 # From this moment on, the law that mandated the daylight saving
111 # time corrections was derogated and no more modifications
112 # to the time zones (for daylight saving) are now made.
113 #
114 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
115 #
116 # Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC),
117 # Tierra del Fuego (TF) & Antartida e Islas
118 Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov
119 -4:16:44 - CMT 1920 May # Cordoba Mean Time
120 -4:00 - ART 1930 Dec
121 -4:00 Arg AR%sT 1969 Oct 5
122 -3:00 Arg AR%sT
123 #
124 # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
125 # Formosa (FM), La Pampa (LP), Chubut (CH)
126 Zone America/Rosario -4:02:40 - LMT 1894 Nov
127 -4:16:44 - CMT 1920 May
128 -4:00 - ART 1930 Dec
129 -4:00 Arg AR%sT 1969 Oct 5
130 -3:00 Arg AR%sT 1991 Jul
131 -3:00 - ART
132 #
133 # Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL),
134 # Neuquen (NQ), Rio Negro (RN)
135 Zone America/Cordoba -4:16:44 - LMT 1894 Nov
136 -4:16:44 - CMT 1920 May
137 -4:00 - ART 1930 Dec
138 -4:00 Arg AR%sT 1969 Oct 5
139 -3:00 Arg AR%sT 1990 Jul
140 -3:00 - ART
141 #
142 # Jujuy (JY)
143 Zone America/Jujuy -4:21:12 - LMT 1894 Nov
144 -4:16:44 - CMT 1920 May
145 -4:00 - ART 1930 Dec
146 -4:00 Arg AR%sT 1969 Oct 5
147 -3:00 Arg AR%sT 1991 Mar 3
148 -4:00 - WART 1991 Oct 6
149 -4:00 1:00 WARST 1992 Mar 15
150 -4:00 - WART 1992 Oct 18
151 -3:00 - ART
152 #
153 # Catamarca (CT)
154 Zone America/Catamarca -4:23:08 - LMT 1894 Nov
155 -4:16:44 - CMT 1920 May
156 -4:00 - ART 1930 Dec
157 -4:00 Arg AR%sT 1969 Oct 5
158 -3:00 Arg AR%sT 1990 Jul
159 -3:00 - ART 1991 Jul
160 -3:00 Arg AR%sT 1992 Jul
161 -3:00 - ART
162 #
163 # Mendoza (MZ)
164 Zone America/Mendoza -4:35:16 - LMT 1894 Nov
165 -4:16:44 - CMT 1920 May
166 -4:00 - ART 1930 Dec
167 -4:00 Arg AR%sT 1969 Oct 5
168 -3:00 Arg AR%sT 1991 Mar 3
169 -4:00 - WART 1991 Oct 15
170 -4:00 1:00 WARST 1992 Mar 1
171 -4:00 - WART 1992 Oct 18
172 -3:00 - ART
173
174 # Aruba
175 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
176 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
177 -4:30 - ANT 1965 # Netherlands Antilles Time
178 -4:00 - AST
179
180 # Bolivia
181 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
182 Zone America/La_Paz -4:32:36 - LMT 1890
183 -4:32:36 - LPMT 1931 Oct 15 # La Paz Mean Time
184 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
185 -4:00 - BOT # Bolivia Time
186
187 # Brazil
188
189 # From Guy Harris:
190 # The OAG lists 1987-10-25 and 1988-02-12 as the starting and
191 # ending dates, giving them as "estimated date(s) based on previous year". We
192 # infer a rule here from one example, always a dangerous practice.... Yes,
193 # they really do switch on Saturday, according to the OAG.
194 # "[America/Porto_Acre]" is for the Territory of Acre;
195 # "[America/Noronha]" is for Fernando De Noronha.
196
197 # From Paul Eggert <eggert@twinsun.com> (1993-11-18):
198 # The mayor of Rio recently attempted to change the time zone rules
199 # just in his city, in order to leave more summer time for the tourist trade.
200 # The rule change lasted only part of the day;
201 # the federal government refused to follow the city's rules, and business
202 # was in a chaos, so the mayor backed down that afternoon.
203
204 # From IATA SSIM (1996-02):
205 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
206 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
207 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
208 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
209 # [The last three states are new to this issue of the IATA SSIM.]
210
211 # From Gwillim Law (1996-10-07):
212 # Geography, history (Tocantins was part of Goias until 1989), and other
213 # sources of time zone information lead me to believe that AL, SE, and TO were
214 # always in BR1, and so the only change was whether or not they observed DST....
215 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
216 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
217 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
218 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
219 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
220 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
221 # become part of the state of Pernambuco). The boundary between BR1 and BR2
222 # has never been clearly stated. They've simply been called East and West.
223 # However, some conclusions can be drawn from another IATA manual: the Airline
224 # Coding Directory, which lists close to 400 airports in Brazil. For each
225 # airport it gives a time zone which is coded to the SSIM. From that
226 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
227 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
228 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
229
230 # From Paul Eggert (1996-11-22):
231 # Let's make the following assumptions:
232 #
233 # * All data in Shanks are correct through 1990. In particular,
234 # Shanks was right when he said Acre stopped observing DST in mid-1988.
235 # * Areas where Shanks reports DST up to 1990, but the IATA reports no DST
236 # in 1995, stopped observing DST in mid-1990.
237 #
238 # Under these assumptions Brazil needs 7 entries to cover all the distinct
239 # time zone histories since 1970:
240 #
241 # Noronha (UTC-2), Fortaleza (UTC-3), and Manaus (UTC-4) stopped observing DST
242 # in mid-1990.
243 # Maceio (UTC-3) stopped observing DST in mid-1990, but started again mid-1995.
244 # Sao Paulo (UTC-3) and Cuiaba (UTC-4) always observed DST.
245 # Porto Acre (UTC-5) stopped observing DST in mid-1988.
246
247 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
248 Rule Brazil 1931 only - Oct 3 11:00 1:00 D
249 Rule Brazil 1932 1933 - Apr 1 0:00 0 S
250 Rule Brazil 1932 only - Oct 3 0:00 1:00 D
251 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D
252 Rule Brazil 1950 only - Apr 16 0:00 0 S
253 Rule Brazil 1951 1953 - Apr 1 0:00 0 S
254 Rule Brazil 1963 only - Dec 9 0:00 1:00 D
255 Rule Brazil 1964 only - Mar 1 0:00 0 S
256 Rule Brazil 1965 only - Jan 31 0:00 1:00 D
257 Rule Brazil 1965 only - Apr 1 0:00 0 S
258 Rule Brazil 1965 only - Dec 1 0:00 1:00 D
259 Rule Brazil 1966 1968 - Mar 1 0:00 0 S
260 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D
261 Rule Brazil 1985 only - Nov 2 0:00 1:00 D
262 Rule Brazil 1986 only - Mar 15 0:00 0 S
263 Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D
264 Rule Brazil 1987 only - Feb 14 0:00 0 S
265 Rule Brazil 1988 only - Feb 7 0:00 0 S
266 Rule Brazil 1989 only - Jan 22 0:00 0 S
267 Rule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D
268 Rule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S
269 Rule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D
270 Rule Brazil 1992 only - Feb 9 0:00 0 S
271 Rule Brazil 1993 max - Oct Sun>=11 0:00 1:00 D
272 Rule Brazil 1993 only - Jan 31 0:00 0 S
273 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S
274 Rule Brazil 1996 max - Feb Sun>=11 0:00 0 S
275
276 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
277 #
278 # Fernando de Noronha
279 Zone America/Noronha -2:09:40 - LMT 1914
280 -2:00 - FST 1963 Dec 9
281 -2:00 Brazil F%sT 1990 Jul
282 -2:00 - FST
283 #
284 # Amapa, east Para, Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba,
285 # Pernambuco (except Fernando de Noronha)
286 Zone America/Fortaleza -2:34:00 - LMT 1914
287 -3:00 - EST 1963 Dec 9
288 -3:00 Brazil E%sT 1990 Jul
289 -3:00 - EST
290 #
291 # Alagoas, Sergipe, Tocantins
292 Zone America/Maceio -2:22:52 - LMT 1914
293 -3:00 - EST 1963 Dec 9
294 -3:00 Brazil E%sT 1990 Jul
295 -3:00 - EST 1995 Jul
296 -3:00 Brazil E%sT
297 #
298 # Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro,
299 # Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul
300 Zone America/Sao_Paulo -3:06:28 - LMT 1914
301 -3:00 Brazil E%sT
302 #
303 # Mato Grosso, Mato Grosso do Sul
304 Zone America/Cuiaba -3:44:20 - LMT 1914
305 -4:00 - WST 1963 Dec 9
306 -4:00 Brazil W%sT
307 #
308 # Roraima, west Para, Amazonas, Rondonia
309 Zone America/Manaus -4:00:04 - LMT 1914
310 -4:00 - WST 1963 Dec 9
311 -4:00 Brazil W%sT 1990 Jul
312 -4:00 - WST
313 #
314 # Acre
315 # Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too.
316 Zone America/Porto_Acre -4:31:12 - LMT 1914
317 -5:00 - AST 1963 Dec 9
318 -5:00 Brazil A%sT 1988 Jul
319 -5:00 - AST
320 #
321 # Martin Vaz and Trinidade are like America/Noronha.
322
323
324 # Chile
325
326 # From Eduardo Krell (1995-10-19):
327 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
328 # of October.... The law is the same for March and October.
329
330 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
331 Rule Chile 1918 only - Sep 1 0:00 1:00 S
332 Rule Chile 1919 only - Jul 2 0:00 0 -
333 Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
334 Rule Chile 1928 1932 - Apr 1 0:00 0 -
335 Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S
336 Rule Chile 1970 max - Mar Sun>=9 0:00 0 -
337 # IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14;
338 # (1996-09) says 1998-03-08. Ignore these for now.
339 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
340 Zone America/Santiago -4:42:40 - LMT 1890
341 -4:42:40 - SMT 1910 # Santiago Mean Time
342 -5:00 Chile CL%sT 1932 Sep # Chile Time
343 -4:00 Chile CL%sT
344 Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri
345 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time
346 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time
347 -6:00 Chile EAS%sT
348 #
349 # Whitman says Juan Fernandez Is are like America/Santiago.
350 # San Ambrosio, San Felix
351 # no information; probably like America/Santiago
352
353
354 # Colombia
355 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
356 Rule CO 1992 only - May 2 0:00 1:00 S
357 Rule CO 1992 only - Dec 31 0:00 0 -
358 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
359 Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
360 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
361 -5:00 CO CO%sT # Colombia Time
362 # Malpelo, Providencia, San Andres
363 # no information; probably like America/Bogota
364
365 # Curacao
366 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
367 Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
368 -4:30 - ANT 1965 # Netherlands Antilles Time
369 -4:00 - AST
370
371 # Ecuador
372 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
373 Zone America/Guayaquil -5:19:20 - LMT 1890
374 -5:14:00 - QMT 1931 # Quito Mean Time
375 -5:00 - ECT # Ecuador Time
376 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
377 -5:00 - ECT 1986
378 -6:00 - GALT # Galapagos Time
379
380 # Falklands
381 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
382 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
383 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
384 Rule Falk 1939 only - Oct 1 0:00 1:00 S
385 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
386 Rule Falk 1943 only - Jan 1 0:00 0 -
387 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
388 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
389 Rule Falk 1984 only - Sep 16 0:00 1:00 S
390 Rule Falk 1985 1995 - Sep Sun>=9 0:00 1:00 S
391 Rule Falk 1986 max - Apr Sun>=16 0:00 0 -
392 Rule Falk 1996 max - Sep Sun>=8 0:00 1:00 S
393 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
394 Zone Atlantic/Stanley -3:51:24 - LMT 1890
395 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
396 -4:00 Falk FK%sT 1983 May # Falkland Is Time
397 -3:00 Falk FK%sT 1985 Sep 15
398 -4:00 Falk FK%sT
399
400 # French Guiana
401 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
402 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
403 -4:00 - GFT 1967 Oct # French Guiana Time
404 -3:00 - GFT
405
406 # Guyana
407 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
408 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
409 -3:45 - GBGT 1966 May 26 # Br Guiana Time
410 -3:45 - GYT 1975 Jul 31 # Guyana Time
411 -3:00 - GYT 1991
412 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
413 -4:00 - GYT
414
415 # Paraguay
416
417 # From Bob Devine (1988-01-28):
418 # Paraguay: First day in October to last in March. Midnight switch??
419 # Since 1980.
420
421 # From U. S. Naval Observatory (1989-01-19):
422 # PARAGUAY 4 H BEHIND UTC
423 # PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89
424
425 # From Shanks (1991):
426 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
427 Rule Para 1975 1978 - Oct 1 0:00 1:00 S
428 Rule Para 1975 1978 - Mar 1 0:00 0 -
429 # Shanks says 1979 was all DST.
430 Rule Para 1980 1991 - Apr 1 0:00 0 -
431 Rule Para 1980 1988 - Oct 1 0:00 1:00 S
432 Rule Para 1989 only - Oct 22 0:00 1:00 S
433 Rule Para 1990 only - Oct 1 0:00 1:00 S
434 Rule Para 1991 only - Oct 6 0:00 1:00 S
435 Rule Para 1992 only - Mar 1 0:00 0 -
436 Rule Para 1992 only - Oct 5 0:00 1:00 S
437 Rule Para 1993 only - Mar 31 0:00 0 -
438 Rule Para 1993 max - Oct 1 0:00 1:00 S
439 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
440 Rule Para 1996 max - Mar 1 0:00 0 -
441 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
442 Zone America/Asuncion -3:50:40 - LMT 1890
443 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
444 -4:00 - PYT 1972 Oct # Paraguay Time
445 -3:00 - PYT 1974 Apr
446 -4:00 Para PY%sT
447
448 # Peru
449 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
450 Rule Peru 1938 only - Jan 1 0:00 1:00 S
451 Rule Peru 1938 only - Apr 1 0:00 0 -
452 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
453 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
454 Rule Peru 1987 only - Jan 1 0:00 1:00 S
455 Rule Peru 1987 only - Apr 1 0:00 0 -
456 Rule Peru 1990 only - Jan 1 0:00 1:00 S
457 Rule Peru 1990 only - Apr 1 0:00 0 -
458 Rule Peru 1993 only - Jan 1 0:00 1:00 S
459 Rule Peru 1993 only - Apr 1 0:00 0 -
460 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
461 Zone America/Lima -5:08:12 - LMT 1890
462 -5:09 - LMT 1908 Jul 28 # Lima Mean Time
463 -5:00 Peru PE%sT # Peru Time
464
465 # South Georgia
466 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
467 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
468 -2:00 - GST # South Georgia Time
469
470 # South Sandwich Is
471 # uninhabited
472
473 # Suriname
474 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
475 Zone America/Paramaribo -3:40:40 - LMT 1911
476 -3:40:52 - PMT 1935 # Paramaribo Mean Time
477 -3:40:36 - PMT 1945 Oct # The capital moved?
478 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
479 -3:30 - SRT 1984 Oct # Suriname Time
480 -3:00 - SRT
481
482 # Trinidad and Tobago
483 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
484 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
485 -4:00 - AST
486
487 # Uruguay
488 # From Paul Eggert <eggert@twinsun.com> (1993-11-18):
489 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
490 # From Shanks (1991):
491 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
492 # Whitman gives 1923 Oct 1; go with Shanks.
493 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
494 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
495 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
496 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
497 # Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman.
498 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
499 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
500 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
501 # Whitman gives 1937 Oct 3; go with Shanks.
502 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
503 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
504 # and 1943 Apr 13 ``to present time''; go with Shanks.
505 Rule Uruguay 1941 only - Aug 1 0:00 0 -
506 Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS
507 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
508 Rule Uruguay 1943 only - Mar 14 0:00 0 -
509 Rule Uruguay 1959 only - May 24 0:00 1:00 S
510 Rule Uruguay 1959 only - Nov 15 0:00 0 -
511 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
512 Rule Uruguay 1960 only - Mar 6 0:00 0 -
513 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
514 Rule Uruguay 1965 only - Sep 26 0:00 0 -
515 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
516 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
517 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
518 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
519 Rule Uruguay 1972 only - Aug 15 0:00 0 -
520 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
521 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
522 Rule Uruguay 1976 only - Oct 1 0:00 0 -
523 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
524 Rule Uruguay 1978 only - Apr 1 0:00 0 -
525 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
526 Rule Uruguay 1980 only - May 1 0:00 0 -
527 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
528 Rule Uruguay 1988 only - Mar 14 0:00 0 -
529 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
530 Rule Uruguay 1989 only - Mar 12 0:00 0 -
531 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
532 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
533 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
534 Rule Uruguay 1992 1993 - Oct Sun>=15 0:00 1:00 S
535 Rule Uruguay 1993 only - Feb 28 0:00 0 -
536 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
537 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
538 -3:44:44 - MMT 1920 May 1 # Montevideo MT
539 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
540 -3:00 Uruguay UY%sT
541
542 # Venezuela
543 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
544 Zone America/Caracas -4:27:44 - LMT 1890
545 -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time
546 -4:30 - VET 1965 # Venezuela Time
547 -4:00 - VET
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