Did you know? While most years that are evenly divisible by the number 4 have a leap day of Feb. 29, some don’t! If the year is evenly divisible by 100 (but NOT 400) then it has no leap day. Thus there are only 97 leap years in a 400 year period, not 100. The year 2000, being evenly divisible by 400, did have a leap day. This was how Pope Gregory XIII made his Gregorian Calendar more accurate than the previous Julian Calendar. To quote Gilbert & Sullivan: A most ingenious paradox! LEARN MORE.
Thus there are only 97 leap years in a 400 year period, not 40.
Should read:
Thus there are only 97 leap years in a 400 year period, not 100.
What about leap hours? Is there exactly 24 hours in a day? If not, why don’t we need to adjust that?