Question

Give the reason.
Why leap year occurs?.​

Answer 1

Explanation:

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:

The simple reason for leap year is that the earth revolves around the sun in approximately 365.25 days, and so to make sure that a calendar year is the same as a tropical year (which is the period of earth's revolution), there needs to be an extra day added every 4 years. But then, even that doesn't make the calendar accurate (the earth doesn't revolve around sun in exactly 365.25 days), so there's another rule that years which are divisible by 100 have to be also divisible by 400 for it to be a leap year. The origin of leap year dates back to 46 BC, when the Julian calendar was introduced by Julius Caesar. Caesar took the advice of Sosigenes of Alexandria, who calculated a year to be 365.25 days.

Our calendar has 365 days in a year, because that's pretty much how long it takes the Earth to orbit the Sun. The problem is that in reality it takes the Earth around 365 ¼ days (actually 365.24219 days) to circle the Sun (that's a solar year), which means our calendar is out by around a quarter of a day a year.

That discrepancy was spotted a while back.

Explanation :-

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