You probably know that 2012 is a leap year. And that means that this year we get an extra day on February 29th. Great--an extra day. Who really cares? Well, leaplings (people born on Leap Year Day of a previous year) care, because they finally get to celebrate their actual birthday. But for the rest of us, it's just a day like any other day. So why do we go to all the trouble to have a leap year?

Epipheo shows you how, based on astronomy, the Gregorian Calendar uses leap year to keep us in tune with the sun, the stars, the universe and our inner man... (yeah, j/k about that last bit...).