This link has been bookmarked by 18 people . It was first bookmarked on 02 Mar 2006, by Raghavendra Ugare.
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29 Nov 14
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since the duration of a solar year is slightly less than 365.25 days. Over a period of 4 centuries, the accumulated error of adding a leap day every 4 years amounts to about 3 extra days. The Gregorian Calendar therefore omits 3 leap days every 400 years, which is the length of its leap cycle
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omitting February 29 in the 3 century years (integer multiples of 100) that are not also integer multiples of 400
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02 Oct 13
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ne whether a year is a leap year or not in either the Gregorian calendar since 1582 or in the proleptic Gregorian calendar between 1 and 1582:
if year is div
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23 Apr 13
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11 Mar 12
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29 Feb 12
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19 Oct 10
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if year modulo 400 is 0 then is_leap_year else if year modulo 100 is 0 then not_leap_year else if year modulo 4 is 0 then is_leap_year else not_leap_year
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13 Jun 09
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10 Mar 08
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04 Mar 08
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12 Feb 07
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In order to get a closer approximation, it was decided to have a leap day 97 years out of 400 rather than once every 4 years. To implement the model, it was provided that years divisible by 100 would be leap years only if they were divisible by 400 as well.
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leap month is added according to a complicated rule, which ensures that month 11 is always the month that contains the northern winter solstice
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The Chinese calendar is lunisolar, so a leap year has an extra month, often called an embolismic month after the Greek word for it.
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28 Sep 06
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