History of Leap Year

The Leap Day, February 29, depicts a day that occurs only once every four years, every Leap Year or intercalary year when an extra day is inserted. But not every fourth year, if that year ends in “00” like 1900, then it is not a Leap Year. Except if that year ending in 00 is also divisible by 400 then it is a Leap Year. Unless it is a Tuesday and it is dark. OK, I made up that last rule. So, years like 2008 are Leap Years, being divisible by 4. 1900…