Leap Year Calculator
Check if any year is a leap year and see why, plus the next and previous leap years.
Leap year?
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How to use it
- 1
Enter a year
Type any year into the box. It starts on the current year so you can check today at a glance.
- 2
See the answer
The tool shows a clear yes or no, along with the exact rule that makes it a leap or common year.
- 3
Browse nearby leap years
Review the next eight and the previous few leap years to plan around them.
Perfect for every need
Planning & scheduling
Know whether February has 29 days when scheduling events, payroll, or subscriptions.
- February 29 events
- Annual billing
- Salary calculations
Students & teachers
Understand and demonstrate the leap year rule with a plain-language explanation.
- Divisible by 4
- Century exceptions
- Math homework
Developers & analysts
Sanity-check date logic and verify leap years when building calendars or reports.
- Date edge cases
- Test fixtures
- Report ranges
Frequently asked questions
What makes a year a leap year?
A year is a leap year if it is divisible by 4, except for century years, which must also be divisible by 400. So 2024 and 2000 are leap years, but 1900 and 2100 are not.
Why do century years have a special rule?
A solar year is about 365.2422 days, slightly less than 365.25. Skipping the leap day in three out of every four century years keeps the Gregorian calendar aligned with the seasons over the long term.
How many days are in a leap year?
A leap year has 366 days because February gains an extra day, February 29. A common year has 365 days.
When is the next leap year?
Leap years occur every four years, with the century-year exception. This tool lists the next eight leap years for any year you enter, so the next one is always one click away.