Not sure if a year is a leap year? Use our Leap Year Calculator to find out instantly.
Just enter any year, and the tool will tell you:
A leap year is a year that has 366 days instead of 365. An extra day, 29 February, is added to keep our calendar aligned with Earth’s orbit around the Sun.
The leap year rule:
Example:
Leap years exist to fix the mismatch between the calendar year (365 days) and the solar year (365.242 days).
Without leap years, our calendar would drift out of sync with the seasons.
Q: How do I know if a year is a leap year?
Enter the year into our calculator. If it’s divisible by 4 (and not 100 unless divisible by 400), it’s a leap year.
Q: How many days are in a leap year?
A leap year has 366 days.
Q: What is the next leap year?
The calculator will show you the next and previous leap years for any year you enter.
Q: Why do we add leap years?
To keep the calendar aligned with the Earth’s orbit and the seasons.