Leap Year Checker
DATES & TIME
Leap Year Checker
Check a Gregorian year for its extra February day.
UNDERSTAND YOUR RESULT
How it works
Check a Gregorian year for its extra February day.
THE CALCULATIONdivisible by 4, except centuries not divisible by 400
Using this calculator
Enter year. divisible by 4, except centuries not divisible by 400.
What to keep in mind
Gregorian calendar, years 1900–9999. Calendar dates use UTC to avoid daylight-saving shifts. Business days mean Monday–Friday; holidays are not excluded.
Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.