| # <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 |