Question

why we have a leap year

Answer 1

A common year has 365 days and aleap year 366 days, with the extra, or intercalary, day designated as February 29. A leap year occurs every four yearsto help synchronize the calendar yearwith the solar year, or the length of time it takes the earth to complete its orbit about the sun, which is about 365¼ days so leap year is occur in every 4 year.
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