Leap Year Checker
Check if a year is a leap year and learn about the significance of leap years in our calendar.
The Earth takes approximately 365.25 days to orbit the Sun, which is why we need leap years to keep our calendar aligned with the seasons.
What is a Leap Year?
A leap year is a year containing one additional day (February 29) to keep the calendar year synchronized with the astronomical year.
- Occurs every 4 years
- February has 29 days instead of 28
- Helps align calendar with Earth's orbit
Leap Year Rules
A year is a leap year if:
- It is divisible by 4
- If divisible by 100, it must also be divisible by 400
- Examples: 2000 (leap), 2100 (not leap)