Overview
What Is a Leap Year Checker?
This tool checks whether a given year is a leap year (366 days) or a common year (365 days) using the standard Gregorian calendar rules.
Check if a year is a leap year instantly.
This tool checks whether a given year is a leap year (366 days) or a common year (365 days) using the standard Gregorian calendar rules.
Useful for calendar planning, programming date logic, or general curiosity.
Input the year you want to check.
See whether it's a leap year.
A year is a leap year if divisible by 4, except century years (divisible by 100) must also be divisible by 400.
Yes, because 2000 is divisible by 400.
No, because although divisible by 4 and 100, it's not divisible by 400.
To keep our calendar synchronized with Earth's actual orbital period, which is about 365.25 days.
Approximately every 4 years, with the century-year exception applied.
February 29th is added, making February 29 days instead of 28.
No, calculations happen entirely in your browser.
No, this is specific to the Gregorian calendar - other calendar systems have different leap year rules.
Yes, this works for any year, past or future.
Yes, completely free with no sign-up required.