3 # Old rules, should the need arise.
4 # No attempt is made to handle Newfoundland, since it cannot be expressed
5 # using the System V "TZ" scheme (half-hour offset), or anything outside
6 # North America (no support for non-standard DST start/end dates), nor
7 # the change in the DST rules in the US in 1987 (which occurred before
8 # the old rules were written).
10 # If you need the old rules, uncomment ## lines and comment-out Link lines.
11 # Compile this *without* leap second correction for true conformance.
13 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
14 ## Rule SystemV min 1973 - Apr lastSun 2:00 1:00 D
15 ## Rule SystemV min 1973 - Oct lastSun 2:00 0 S
16 ## Rule SystemV 1974 only - Jan 6 2:00 1:00 D
17 ## Rule SystemV 1974 only - Nov lastSun 2:00 0 S
18 ## Rule SystemV 1975 only - Feb 23 2:00 1:00 D
19 ## Rule SystemV 1975 only - Oct lastSun 2:00 0 S
20 ## Rule SystemV 1976 max - Apr lastSun 2:00 1:00 D
21 ## Rule SystemV 1976 max - Oct lastSun 2:00 0 S
23 # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
24 ## Zone SystemV/AST4ADT -4:00 SystemV A%sT
25 ## Zone SystemV/EST5EDT -5:00 SystemV E%sT
26 ## Zone SystemV/CST6CDT -6:00 SystemV C%sT
27 ## Zone SystemV/MST7MDT -7:00 SystemV M%sT
28 ## Zone SystemV/PST8PDT -8:00 SystemV P%sT
29 ## Zone SystemV/YST9YDT -9:00 SystemV Y%sT
30 ## Zone SystemV/AST4 -4:00 - AST
31 ## Zone SystemV/EST5 -5:00 - EST
32 ## Zone SystemV/CST6 -6:00 - CST
33 ## Zone SystemV/MST7 -7:00 - MST
34 ## Zone SystemV/PST8 -8:00 - PST
35 ## Zone SystemV/YST9 -9:00 - YST
36 ## Zone SystemV/HST10 -10:00 - HST
38 Link America/Halifax SystemV/AST4ADT
39 Link America/New_York SystemV/EST5EDT
40 Link America/Chicago SystemV/CST6CDT
41 Link America/Denver SystemV/MST7MDT
42 Link America/Los_Angeles SystemV/PST8PDT
43 Link America/Anchorage SystemV/YST9YDT
44 Link America/Puerto_Rico SystemV/AST4
45 Link America/Indianapolis SystemV/EST5
46 Link America/Regina SystemV/CST6
47 Link America/Phoenix SystemV/MST7
48 Link Pacific/Pitcairn SystemV/PST8
49 Link Pacific/Gambier SystemV/YST9
50 Link Pacific/Honolulu SystemV/HST10