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【 leap year 】Leap year. Year that includes one year for 366 days and year, February 29 that is are said in the Gregorian style. By the way, it is possible to judge by the following method. Year when the Christian era can be divided by 400 is a leap year. Year when the Christian era can be divided by 100 is not a leap year when it cannot be divided by 400. Year when the Christian era can be fourthly divided is a leap year when it cannot be divided by 100. It is not a leap year when it cannot be fourthly divided. Example 2004 year of the leap year is 2100 at the leap year in 2000.
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