Why does leap year occur

Leap year occur

Leap year is a little bit confusing, regularly years consist of 365 days but when leap year occurs, it has additional day making it totally 366 days, Though all that confusion it is not that complicated.

Why does leap year occur

,It takes the Earth 365 days and about 6 hours to complete an orbit around the sun, this could cause an error if the 6 hours are not added in some way, this means that the calendar will start a new year 6 hours before the Earth's rotation around the sun.

Julius Caesar was who invented "leap year" idea when he made a huge changes in the calendar, he decided to add an extra day every 4 years (6+6+6+6=24: 1 day), February is the month that increases probably because it is the shortest, later Gregorian calendar added more accurate edits.

Leap year occurs every 4 years, it has to be perfectly dividable to 4 such as 2000, 2004, 2008...

Note that years which are dividable to 100 but not to 400 like 1800 are not leap years.

Last leap year: 2020
Next one: 2024 

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