[lp_date_leapyear]
| Link | lp_date_leapyear |
| Author | Bil Corry |
| Category | Date |
| Version | 8.x |
| License | Public Domain |
| Posted | 02 Dec 2005 |
| Updated | 03 Dec 2005 |
| More by this author... | |
Description
Given a year (or date), it returns true if it is a Gregorian leap year, or false if it is not. If no year is passed, it assumes the current year.
Sample Usage
LeapYear Example [loop: -from=1800, -to=2200][if: (lp_date_leapyear: loop_count)] [loop_count] is a leap year[/if][/loop][lp_date_leapyear] [lp_date_leapyear: date]
Source Code
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[ define_tag:'lp_date_leapyear', -description='Given a year (or date), it returns true if it is a Gregorian leap year, or false if it is not. If no year is passed, it assumes the current year.', -priority='replace', -optional='year',-copy; // gregorian leap year algorithm from http://mindprod.com/jglossleapyear.html (now MIA) // valid roughly from 1800 forward if: !(local_defined:'year'); local:'year' = date; /if; if: #year->type == 'date'; #year = (integer: #year->year); else; // assume integer year #year = integer: #year; /if; if: #year % 4 != 0; return: false; else: #year % 100 != 0; return: true; else: #year % 400 != 0; return: false; else; return: true; /if; /define_tag; ]
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