Leap Year Calculator
Enter a year to find out if it's a leap year based on the Gregorian calendar rules.
What is a Leap Year?
A leap year is a year containing an extra day (February 29th) in order to keep the calendar year synchronized with the astronomical year.
Rules for Leap Years:
- The year must be evenly divisible by 4;
- If the year can also be evenly divided by 100, it is not a leap year;
- UNLESS the year is also evenly divisible by 400. Then it is a leap year.