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# <pre> # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # Old rules, should the need arise. # No attempt is made to handle Newfoundland, since it cannot be expressed # using the System V "TZ" scheme (half-hour offset), or anything outside # North America (no support for non-standard DST start/end dates), nor # the changes in the DST rules in the US after 1976 (which occurred after # the old rules were written). # # If you need the old rules, uncomment ## lines. # Compile this *without* leap second correction for true conformance. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule SystemV min 1973 - Apr lastSun 2:00 1:00 D Rule SystemV min 1973 - Oct lastSun 2:00 0 S Rule SystemV 1974 only - Jan 6 2:00 1:00 D Rule SystemV 1974 only - Nov lastSun 2:00 0 S Rule SystemV 1975 only - Feb 23 2:00 1:00 D Rule SystemV 1975 only - Oct lastSun 2:00 0 S Rule SystemV 1976 max - Apr lastSun 2:00 1:00 D Rule SystemV 1976 max - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] ## Zone SystemV/AST4ADT -4:00 SystemV A%sT ## Zone SystemV/EST5EDT -5:00 SystemV E%sT ## Zone SystemV/CST6CDT -6:00 SystemV C%sT ## Zone SystemV/MST7MDT -7:00 SystemV M%sT ## Zone SystemV/PST8PDT -8:00 SystemV P%sT ## Zone SystemV/YST9YDT -9:00 SystemV Y%sT ## Zone SystemV/AST4 -4:00 - AST ## Zone SystemV/EST5 -5:00 - EST ## Zone SystemV/CST6 -6:00 - CST ## Zone SystemV/MST7 -7:00 - MST ## Zone SystemV/PST8 -8:00 - PST ## Zone SystemV/YST9 -9:00 - YST ## Zone SystemV/HST10 -10:00 - HST
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50 entries across 50 versions & 6 rubygems