Question

What is leap year ? When and why does
h it appear?​

Answer 1

Answer:

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A Leap Day, February 29, is added to the calendar during leap years. This extra day, also called Leap Year Day, makes the year 366 days long – not 365 days, like a common year.

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Answer 2

Answer:

Leap year is a year when there are 366 days instead of 365 days in the year. It occur in every 4 years 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.