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Expressions by User

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Title Test Details Leap Year
Expression
(15(8[48]|9[26]))|((1[6-9]|[2-9]\d)(0[48]|[13579][26]|[2468][048]))|(([2468][048]|16|3579[26])00)
Description
Validates four-digit leap years after 1582 (when Pope Gregory XIII switched to the Gregorian calendar). The last recognized leap year is 9996, so no worries with the y3k bug.
Matches
1584, 2000, 2048
Non-Matches
1200, 1580, 1941, 1800
Author Rating: The rating for this expression. Jon Gray
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