Why do we have a Leap Day and what would happen if we didn’t? [Video]

Leap year. It’s a delight for the calendar and math nerds among us. So how did it all begin and why?Have a look at some of the numbers, history and lore behind the (not quite) every four year phenom that adds a 29th day to February.BY THE NUMBERSThe math is mind-boggling in a layperson sort of way and down to fractions of days and minutes. There’s even a leap second occasionally, but there’s no hullabaloo when that happens.>>> More about Leap Year: Here’s how Leap Year impacts your paycheckThe thing to know is that leap year exists, in large part, to keep the months in sync with annual events, including equinoxes and solstices, according to the Jet Propulsion Laboratory at the California Institute of Technology.It’s a correction to counter the fact that Earth’s orbit isn’t precisely 365 days a year. The trip takes about six hours longer than that, NASA …