Leap Day should be an international holiday. There’s no other day like it—an extra day that we completely forgot about. It’s sort of like finding a $10 bill in your jacket pocket. It’s not every year that we have a February 29th. Let’s soak it up.
Leap Day dates back to the time of Julius Caesar, when he added extra days to the existing calendar (and named a month after himself). Since it takes 365.2422 days for Earth to rotate around the sun, Caesar added an extra day every four years to catch his calendar up.