Today is February 29th or Leap Day!  We have a friend that was born on Leap Day, so tonight  is her 13th birthday party. (She is really in her 50s) We leaped some stuff in a video for your enjoyment,  but first: Let's explore why we  add an extra day to our calendar every 4 years?

Here is the explanation from TimeandDate.com:

Leap Years are needed to keep our calendar in alignment with the Earth's revolutions around the sun. It takes the Earth approximately 365.242199 days – or 365 days, 5 hours, 48 minutes, and 46 seconds (a tropical year) – to circle once around the Sun.

However, the Gregorian calendar has only 365 days in a year, so if we didn't add a day on February 29 nearly every 4 years, we would lose almost six hours off our calendar every year. After only 100 years, our calendar would be off by approximately 24 days!

Brian and Todd wanted to celebrate Leap Day by the only way they know how, by leaping stuff: