Feb. 29 is more than just an extra day we have once every four years. There is some science behind it. Here's how leap days came to be.

Here are 29 things to know about this special day. 1 February 29 is known as a leap day, and it occurs every four years in what is known as a leap year. This extra day is needed to “play catch ...

The emperor Caesar adopted a 365-day calendar and added 10 days to it, including a leap day in February every four years, writes Calendar.com. Eventually, the calendar we all know was adopted by ...