Leap Year: History Behind February 29th

Have you ever wondered what the big deal about leap year is all about? Why is an extra day in February added every four years? What is the origin of this custom? The history of February 29th is quite fascinating, and it is based on ancient calendars. Each era has had a hand in shaping the leap year tradition as we know it today, from the Roman calendar to the Julian calendar to the Gregorian calen...