Leap Year Checker
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Formula: Leap if: (divisible by 4 AND not by 100) OR (divisible by 400)
Leap if: (divisible by 4 AND not by 100) OR (divisible by 400)
Step-by-Step Examples
2024 = Yes (leap year)
2024 / 4 = 506 with no remainder
Frequently Asked Questions
What is a leap year?
A year with 366 days (February has 29 days). Leap years occur every 4 years with some exceptions.
Why do we have leap years?
A solar year is 365.2422 days. Leap years correct the ~0.25 day difference to keep the calendar aligned with Earth's orbit.
Is 2100 a leap year?
No. Years divisible by 100 are NOT leap years unless also divisible by 400. So 2000 was a leap year, but 2100 will not be.