Definition of

Leap Year

Leap Year
A year containing an extra day. It has 366 days instead of the normal 365 days.

The extra day is added in February, which has 29 days instead of the normal 28 days.

Leap years occur every 4 years. 2016 is a leap year and so is 2020.

Except that every 100 years special rules apply. For example 1900 was not a leap year, but 2000 was.

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