How to Calculate Leap Year and Why it Exists in the First Place

5. Leap Years Around the World

In other places in the world, there were traditions building to correct the drift of a calendar. These took place long before we had the knowledge of earth’s orbit around the sun. In the Chinese calendar, it is corrected with a leap month every three years. The leap month is placed in a different part of a calendar every year.

In the African country of Ethiopia, rather than being in February, at the end of the year, an extra day is added to the calendar. This also happens every four years, as a leap year.