Today's calendar was not a typo, it is indeed February 29. That's right, 2016 is a leap year. Shocking. This so-called holiday comes only once every four years, like the Olympics or an emotional breakdown. Hopefully, you've made the most of your extra time by complaining about never having any extra time. Here are the funniest tweets about Leap Day that will have you jumping for joy (or at least silently laughing at your phone).