Is It a Leap Year? — Leap Year Checker
Check if any year is a leap year. See the next leap year and the rule behind the calendar.
The Leap Year Rule
A year is a leap year if: divisible by 4, EXCEPT years divisible by 100, UNLESS also divisible by 400. So 2024 = leap (÷4). 1900 = NOT leap (÷100). 2000 = leap (÷400). This correction exists because Earth orbits the Sun in 365.2422 days — without leap years, the calendar would drift by 1 day every 4 years.
Leap Year Fun Facts
People born on Feb 29 (leaplings) only celebrate their actual birthday every 4 years. There are approximately 5 million leaplings worldwide. The odds of being born on Feb 29: 1 in 1,461. In the Gregorian calendar, leap years repeat on a 400-year cycle containing exactly 97 leap years.
The Gregorian calendar is so accurate that it only drifts by 1 day every 3,236 years. The Julian calendar it replaced drifted by 1 day every 128 years. By the time the Gregorian calendar was adopted in 1582, the Julian calendar had drifted by 10 days.
