Question

why February have 28 days and after 4 years February have 29 days​

Answer 1

because earth takes a round of the sun in approximately in 365 days it was necessary to have some months of 30 days and some months of 31 days. If we would have had six months of 30 days and six months of 31 days the calendar year would have been of 366 days. So it was considered necessary to have made one of the 30 days month a month of 29 days. Since instead of December, February used to be the last month of the year during those days, the February was cut short to a month of 29 days. But it was realized that earth takes about 365.25 days to take one round of the sun.

:)

Answer 2

Due to leap year the earth revolution around sun takes 356 and 1/4 days to complete so after every 4 years the 1/4 day becomes 1 whole day (1/4+1/4+1/4+1/4=1)

Therefore February has 29 days in the leap year

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