Online Videos Explain: What Is A Leap Year?

Today is February 29, which, as you probably know, is a pretty special day—it’s Leap Day!  February 29 only comes along once every four years, so hopefully you’re making the most of it!  But why do we add an extra day to the calendar every four years?  Here are a few great online video explanations.

You probably already know that the purpose of the Leap Year is to keep the calendar even.  365 days is ever so slightly shorter than a full astrological year, so every fourth year we add a day to even things out.