Is the year 2000 a leap year? How about 1900? Find out by using this simple leap year calculator. You can test either a specific year to see if it is a leap year or you can create a list of leap years within a range of years.
Almost everyone knows that a leap year occurs every four years. And a good number of people can recall something about dividing by 400. But there are actually three tests that must be performed to determine if a year is a leap year. Here is the complete set of tests in the order they must be performed.
- Years evenly divisible by four are normally leap years, except for...
- Years also evenly divisible by 100 are not leap years, except for...
- Years also evenly divisible by 400 are leap years.
If you do the math, you will find that in every 400 years there are 97 leap years which yields an average calender year of 365.2425 days. This is very close to the actual number of days in a solar year, 365.2422. But it's not close enough to prevent us from being off by 3 days every 10,000 years!