About the Leap Year Calculator Enter any year to instantly find out if it is a leap year. The calculator uses the Gregorian calendar rules and also shows you the nearest leap years and key facts about the year. Quick checks: Is 2026 a leap year? Is 2024 a leap year? Is 2100 a leap year? Is 2000 a leap year? Is 1900 a leap year? Leap Year Rule Summary A year is a leap year if it is divisible by 4, except for end-of-century years, which must be divisible by 400. So 2000 and 2400 are leap years, but 1700, 1800, and 1900 are not.
