Leap Year Checker & Calculator
Check if a year has 366 days (February 29) with mathematical verification
Test Years:
Verification Result
Year 2026
NOT a Leap Year
365 Days (February has 28 days)
Upcoming Leap Years:
2028, 2032, 2036, 2040, 2044, 2048
Frequently Asked Questions
A year is a leap year if:
1. It is divisible by 4,
2. EXCEPT if it is divisible by 100,
3. UNLESS it is also divisible by 400 (e.g. 2000 was a leap year, but 1900 was not).
1. It is divisible by 4,
2. EXCEPT if it is divisible by 100,
3. UNLESS it is also divisible by 400 (e.g. 2000 was a leap year, but 1900 was not).
2024 was a leap year. The next upcoming leap years are 2028, 2032, 2036, 2040, 2044, 2048, and 2052.