How many days are there in a leap year?

A leap year has 366 days. This is an important concept in the Gregorian calendar, which consists of 12 months. Normally, a year has 365 days, but in order to keep the calendar aligned with the Earth's revolutions around the sun, an extra day is added every four years. This extra day is added to February, making it 29 days long instead of the usual 28.

The purpose of a leap year is to correct for the fact that a year is not exactly 365 days long; it is approximately 365.2422 days. By adding an extra day in February, we ensure that our calendar remains in sync with the astronomical seasons over long periods. Therefore, the addition of this day results in a total of 366 days during a leap year.