2016 is very special and not just because it’s 11111100000 in binary. Today's Doodle celebrates a rare day indeed: Leap Day!

The 29th of February only happens every four years. This is to keep our calendar in sync with the rotation of the Earth around the sun. Without Leap Day, we'd be out of sync by about six hours per year.

But wait, there’s more...Leap Day happens every four years unless that year is divisible by 100. If you were around in 1900, you would have missed out on the magic of February 29. For anyone born on Leap Day, that's one less birthday party — we hope today's Doodle illustrated by Olivia When, helps make up for lost time!

Early concepts by Doodler Olivia When