Question

why do we have 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

Explanation:

Answer 2

Answer:

February 29 is a date that usually occurs every four years, and is called the leap day. This day is added to the calendar in leap years as a corrective measure, because the Earth does not orbit the sun in precisely 365 days. The Gregorian calendar is a modification of the Julian calendar first used by the Romans.

If we didn't add a leap day on February 29 almost every four years, each calendar year would begin about 6 hours before the Earth completes its revolution around the Sun (see illustration). ... With a deviation of approximately 6 hours per year, the seasons would shift by about 24 calendar days within 100 years....

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