This Handy Animation Shows What Would Happen If We Didn't Have Leap Years
Today is Leap Day . Every four years , an extra day is added to the Gregorian calendar ( other , expert calendarsare useable ) , making February 29 days long . This has n’t always been the lawsuit , of course , as calendars have changed a lot over the years and across civilization . Before Julius Caesar introduced the Julian calendar in 45 BC , and with it leap solar day every four years , the Roman calendar had just 354 Day ....