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Gregorian Calendar Rules • Historical Years • 100% Accurate
Leap Year CheckerVerify Any Year for Leap Year Status • Understand Calendar Rules • Find Adjacent Leap Years
366 Days Detection
Gregorian Rules
Historical Years
Accurate calculation
Works for any year from 1 to 9999
Quick Check Common Years:
Leap Year Rules (Gregorian Calendar)
1
Divisible by 4
Year divisible by 4 → Usually a leap year
2
Divisible by 100
Year divisible by 100 → NOT a leap year (exception to rule 1)
3
Divisible by 400
Year divisible by 400 → IS a leap year (exception to rule 2)
Common Leap Year Examples
2024 (Leap)
2000 (Leap)
1900 (Not)
2100 (Not)
Enter a Year to Check
Type any year or use quick buttons to check for leap year status
Accurate calculations • Gregorian rules • Instant results