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1.1 root 1: # @(#)southamerica 4.3
2:
3: # From Guy Harris:
4: # From Official Airline Guide - Worldwide Edition (1987). Countries not
5: # listed here do not observe DST, according to the OAG. Time zone names
6: # are pure inventions, and none are supplied for countries not observing
7: # DST; updates from natives would be appreciated. The times that DST
8: # starts and ends are based on the assumption that they switch a 2AM just
9: # as everybody else does.
10:
11: ###############################################################################
12:
13: # Brazil
14:
15: # From Guy Harris:
16: # The OAG lists October 25, 1987 and February 12, 1988 as the starting and
17: # ending dates, giving them as "estimated date(s) based on previous year". We
18: # infer a rule here from one example, always a dangerous practice.... Yes,
19: # they really do switch on Saturday, according to the OAG.
20: # "Brazil/Acre" is for the Territory of Acre; "Brazil/DeNoronha" is for
21: # Fernando De Noronha.
22:
23: # From Bob Devine (January 28, 1988):
24: # The only information I found is that there was no DST up to 1985.
25: # But there was some before 1952!
26:
27: # From U. S. Naval Observatory (January 16, 1989):
28: # BRAZIL WEST 5 H BEHIND UTC TERRITORY OF ACRE
29: # BRAZIL WEST 4 H BEHIND UTC ACRE OCT 23, '88-FEB 11,
30: # BRAZIL '89 (ESTIMATED)
31: # BRAZIL CENTRAL 4 H BEHIND UTC MANAUS
32: # BRAZIL CENTRAL 3 H BEHIND UTC MANAUS OCT 23, '88-FEB 11,
33: # BRAZIL CENTRAL '89 (ESTIMATED)
34: # BRAZIL EAST 3 H BEHIND UTC COASTAL STATES, RIO, SAO
35: # BRAZIL EAST PAULO, BRASILIA
36: # BRAZIL EAST 2 H BEHIND UTC COASTAL STATES, RIO, SAO
37: # BRAZIL PAULO, BRASILIA OCT 23,
38: # BRAZIL '88-FEB 11, '89
39: # BRAZIL (ESTIMATED)
40: # BRAZIL 2 H BEHIND UTC ATLANTIC ISLANDS, FERNANDO
41: # BRAZIL DE NORONHA
42: # BRAZIL 1 H BEHIND UTC OCT 23, '88-FEB 11, '89
43: # BRAZIL (ESTIMATED)
44: # BRAZIL 3 H BEHIND UTC FOR MOST MAJOR AIRPORTS.
45:
46: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
47: Rule Brazil 1987 max - Feb Sat<=14 2:00 0 S
48: Rule Brazil 1987 max - Oct Sat<=28 2:00 1:00 D
49:
50: # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
51: Zone Brazil/East -3:00 Brazil E%sT
52: Zone Brazil/West -4:00 Brazil W%sT
53: Zone Brazil/Acre -5:00 Brazil A%sT
54: Zone Brazil/DeNoronha -2:00 Brazil F%sT
55:
56: ###############################################################################
57:
58: # Chile
59:
60: # From Guy Harris:
61: # The OAG lists October 11, 1987 and March 12, 1988 as the starting and
62: # ending dates, giving them as "estimated date(s) based on previous year."
63:
64: # From Bob Devine (January 28, 1988):
65: # Chile has had 2nd Sunday in October to 2nd Sunday in March DST since 1977.
66: # Switch is at midnight. OAG is right.
67:
68: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
69: Rule Chile 1977 max - Oct Sun>=8 0:00 1:00 D
70: Rule Chile 1978 max - Mar Sun>=8 0:00 0 S
71:
72: # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
73: Zone Chile/Continental -4:00 Chile C%sT
74: Zone Chile/EasterIsland -6:00 Chile E%sT
75:
76: ###############################################################################
77:
78: # Paraguay
79:
80: # From Bob Devine (January 28, 1988):
81: # Paraguay: First day in October to last in March. Midnight switch??
82: # Since 1980.
83:
84: # From U. S. Naval Observatory (January 19, 1989):
85: # PARAGUAY 4 H BEHIND UTC
86: # PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89
87:
88: # From Arthur David Olson (January 21, 1989):
89: # Still don't know time of day when switch occurs. Punt.
90:
91: ###############################################################################
92:
93: # Argentina
94:
95: # From Bob Devine (January 28, 1988):
96: # Argentina: first Sunday in October to first Sunday in April since 1976.
97: # Double Summer time from 1969 to 1974. Switches at midnight.
98:
99: # From U. S. Naval Observatory (January 19, 19889):
100: # ARGENTINA 3 H BEHIND UTC
101:
102: # From Arthur David Olson (January 21, 1989):
103: # OAG, USNO and Bob have different data. Punt.
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