February 29 is Leap Day. No, don’t start jumping just yet, this has nothing to do with frogs or ballet. It has to do with catching up to the Gregorian calendar and the rotation of the sun.
According to the Gregorian calendar which is the most widely used civil calendar in the world, and it's a day that takes place mostly during years that are divisible by four.
So, years including 2004, 2008, and 2012 were leaping years, and this year, we're celebrating leap day again.