Leap Year Checker
Check whether a year is a leap year, and see the rule that applies.
About this tool
Check whether any year is a leap year under the Gregorian calendar rule, with a plain-language explanation of why.
Key Features
- Instant yes/no answer
- Shows which rule applied
- Works for any year, including centuries
How to Use
- Enter a year.
- Click Check.
- See the result and the rule that applied.
Benefits
- Plan February 29th events
- Double-check date calculations
- Settle the "is 2000 a leap year" question
Frequently Asked Questions
A year is a leap year if it is divisible by 4 — except century years (divisible by 100), which are only leap years if they are also divisible by 400. So 2024 and 2028 are leap years, 1900 was not, but 2000 was.
A year divisible by 4 alone slightly overcorrects for the fact that a solar year is about 365.2422 days, not exactly 365.25. Skipping 3 leap years every 400 years (the century years not divisible by 400) brings the calendar much closer to the actual solar year.
This calculator applies the Gregorian rule, which was introduced in 1582 and adopted at different times in different countries. For years before your country's adoption date, the older Julian calendar's simpler "divisible by 4" rule was actually in use, so results for historical dates may not match records from that period.