Check if a given year is a leap year. Get detailed explanation of why a year qualifies or doesn't qualify as a leap year.
Quick Check
Methodology and approach
The checker applies the Gregorian calendar leap year rules, dividing by 4, 100, and 400 to determine validity.
Enter dates in the format shown by this tool. Date-only calculations use calendar dates; date-time fields use local time unless a timezone selector is provided. Timestamp outputs identify their units.
Common questions about this tool
