Question

what is a leap year's

Answer 1

Leap year is a calander year containing one additional day added to keep the calander year synchronized with the astronomical or seasonal year

Answer 2

Question :-

What is a leap year?

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A year with 366 days is called a leap year.

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$\Huge\bf{\color{lime}More :}$

Six hours saved every year are added to make one day (24 hours) over a span of four days. This surplus day is added to the month of February. Thus every fourth year, February is of 29 days instead of 28 days.