Leap Year’s creation involves lots of math and two calendars

(CNN)– Today is a Leap Day, which is celebrated only once every 4 years but do you know why?

Well our calendar has 365 days but it actually takes three hundred and 65.25 days for the earth to orbit the sun.

In 46 B.C., Julius Caesar began the practice of adding an extra day every four years to fix the discrepancy.

But it resulted in 10 extra days by 1582.

That’s when Pope Gregory the 13th created a new calendar with February 29th as the official Leap Day.

It established an extra day in every year divisible by four but only in century years that are evenly divided by 400.

If that’s too confusing just remember in the U.S. Leap Year coincides with presidential elections.