1# <pre>
2# @(#)systemv	8.2
3# This file is in the public domain, so clarified as of
4# 2009-05-17 by Arthur David Olson.
5
6# Old rules, should the need arise.
7# No attempt is made to handle Newfoundland, since it cannot be expressed
8# using the System V "TZ" scheme (half-hour offset), or anything outside
9# North America (no support for non-standard DST start/end dates), nor
10# the changes in the DST rules in the US after 1976 (which occurred after
11# the old rules were written).
12#
13# If you need the old rules, uncomment ## lines.
14# Compile this *without* leap second correction for true conformance.
15
16# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
17Rule	SystemV	min	1973	-	Apr	lastSun	2:00	1:00	D
18Rule	SystemV	min	1973	-	Oct	lastSun	2:00	0	S
19Rule	SystemV	1974	only	-	Jan	6	2:00	1:00	D
20Rule	SystemV	1974	only	-	Nov	lastSun	2:00	0	S
21Rule	SystemV	1975	only	-	Feb	23	2:00	1:00	D
22Rule	SystemV	1975	only	-	Oct	lastSun	2:00	0	S
23Rule	SystemV	1976	max	-	Apr	lastSun	2:00	1:00	D
24Rule	SystemV	1976	max	-	Oct	lastSun	2:00	0	S
25
26# Zone	NAME		GMTOFF	RULES/SAVE	FORMAT	[UNTIL]
27## Zone	SystemV/AST4ADT	-4:00	SystemV		A%sT
28## Zone	SystemV/EST5EDT	-5:00	SystemV		E%sT
29## Zone	SystemV/CST6CDT	-6:00	SystemV		C%sT
30## Zone	SystemV/MST7MDT	-7:00	SystemV		M%sT
31## Zone	SystemV/PST8PDT	-8:00	SystemV		P%sT
32## Zone	SystemV/YST9YDT	-9:00	SystemV		Y%sT
33## Zone	SystemV/AST4	-4:00	-		AST
34## Zone	SystemV/EST5	-5:00	-		EST
35## Zone	SystemV/CST6	-6:00	-		CST
36## Zone	SystemV/MST7	-7:00	-		MST
37## Zone	SystemV/PST8	-8:00	-		PST
38## Zone	SystemV/YST9	-9:00	-		YST
39## Zone	SystemV/HST10	-10:00	-		HST
40