Question

why do we have a leap year?​

Answer 1

Answer:

Blame Earth's orbit around the sun, which takes approximately 365.25 days. It's that . 25 that creates the need for a leap year every four years. ... During leap years, a leap day is added to the calendar to slow down and synchronize the calendar year with the seasons...

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Answer 2

Answer:

As earth revolve around the sun.

leap year has 366 days that means one day extra to ordinary year.