Check if a year is a leap year and see a list of upcoming leap years.
Is 2026 a leap year? Is 2100? Our Leap Year Checker helps you understand the complex rules of the Gregorian calendar. Leap years occur to...
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Is 2026 a leap year? Is 2100? Our Leap Year Checker helps you understand the complex rules of the Gregorian calendar. Leap years occur to keep our calendar in alignment with the Earth's revolutions around the Sun.
Simply enter any year to see if it contains that extra day—February 29th. We provide a full explanation of the 'divisible by 4, but not 100, unless 400' rule and list the next 5 leap years for your planning.
Type in any year in the past or future.
Instantly see if it's a 'Leap Year' or a 'Common Year'.
Understand the mathematical logic used for the calculation.
Years divisible by 100 are not leap years unless they are also divisible by 400. 1900 fails this rule, but 2000 passes.
February 29th is the extra day added to the calendar every four years (mostly).
Approximately every 4 years, but the 100/400 rule means we skip 3 leap years every 400 years.
Accurate results based on the Gregorian calendar rules.
Calculate a future date by adding a specific number of days.
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Calculate a past date by subtracting a specific number of years.