A LITTLE HELP FOR YOUR NEXT TASK

Leap Year Checker

Check whether a year has 365 or 366 days using the Gregorian leap-year rule. Free and instant.

Private by design

Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.

Year

Enter a year to check February.

The leap-year rule

In the proleptic Gregorian calendar, years divisible by 4 are leap years, except century years must also be divisible by 400. 2000 is leap; 1900 is not. Historical local calendar adoption is not modeled.

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How to use Leap Year Checker

Enter the requested dates or year.
Adjust optional settings and read the local result.

Read the detailed guide →

What are the limits of Leap Year Checker?

Years 1–9999, proleptic Gregorian calendar. Historical local calendar adoption is not modeled.