| http://www.w3.org/ns/prov#value | - Leap years have been traced back to Egyptian times, but it was Julius C??sar and later Augustus who successfully introduced them into the Roman calendar by recognising two February 24ths. by a curious quirk of timing, any year whose date is a number exactly divisible by four is a leap year, except those years ending in '00', which must be divisible by 400 to qualify.
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