Leap Year Checker
Check whether any year is a leap year, and see why.
Is 2026 a leap year?
No
2026 is not divisible by 4.
Days in the year
365
Days in February
28
Divisible by 4
No
Divisible by 100
No
Divisible by 400
No
A leap year is divisible by 4, except century years, unless also divisible by 400.
- The rule exists because the solar year is 365.2422 days. Skipping three leap days every 400 years keeps the calendar accurate to within a day per 3,200 years.
| Leap year | Length | Relative |
|---|---|---|
| 2020 | 366 days | Past |
| 2024 | 366 days | Past |
| 2028 | 366 days | Future |
| 2032 | 366 days | Future |
| 2036 | 366 days | Future |
What does Leap Year Checker do?
Check leap years with the full Gregorian rule, including the century exceptions that catch people out — 1900 was not a leap year, 2000 was. It also lists nearby leap years and explains which rule applied.
How to Use Leap Year Checker
- 1Enter a yearAny year at all.
- 2Read the verdictWith the rule that decided it.
- 3See nearby leap yearsListed underneath.
Key Features
- Full Gregorian rule including the 100 and 400 year exceptions
- Explains which rule applied to your year
- Lists the previous and next several leap years
- Days in the year and in February shown
- Works for any year, past or future
Frequently Asked Questions
What is the leap year rule?
A year is a leap year if divisible by 4, except years divisible by 100, unless also divisible by 400. So 2024 yes, 1900 no, 2000 yes.
Why do we need the century exception?
Because the solar year is 365.2422 days, not 365.25. Adding a day every four years overcorrects by about 11 minutes a year. Skipping three leap days every 400 years brings the calendar back to within a day per 3,200 years.
When is the next leap year?
Leap years fall every four years — 2028, 2032, 2036 and so on. The next century exception is 2100, which will not be a leap year despite being divisible by 4.
What happens to 29 February birthdays?
Legally it varies. Most jurisdictions treat 1 March as the birthday in common years for age-of-majority purposes, though some use 28 February. Our age calculator uses the 1 March convention.
Dates and times are calculated in your browser using its built-in IANA time zone database. Nothing you enter is transmitted.
Related Tools
Days in Month Calculator
How many days are in any month of any year.
Age Calculator
Find your exact age in years, months, days, hours and minutes.
Date Difference Calculator
Days, weeks, months and years between any two dates.
Week Number Calculator
Find the ISO week number for any date, and vice versa.