February 29 in the Gregorian calendar, the most widely used today, is a date that occurs only once every four years, in years evenly divisible by 4, such as 1996, 2000, 2004, 2008, 2012 or 2016 (with the exception of century years not divisible by 400, such as 1900). These are called leap years. February 29 is the 60th day of the Gregorian calendar in such a year, with 306 days remaining until the end of that year. It is also known as Leap Day.