Leap Year Calculator
Use the calculator below to see if it is currently a leap year. You can check any other year as well.
Results: Is 2026 A Leap Year?
| Last Leap Year: | 2024
|
| Next Leap Year: | 2028
|
On this page:
Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.
What Is a Leap Year?
A leap year is a year that has 366 days instead of the usual 365 days. In a leap year, there are 29 days in February instead of 28. The extra day is called a leap day.
Leap years are necessary to keep the calendar aligned with Earth’s orbit around the Sun, which takes 365.24 days to complete. Since this is slightly longer than a 365-day calendar year, an extra day is added every 4 years to catch up.
How to Calculate If It Is a Leap Year
You can use a set of standardized rules to determine if any year is a leap year:
- If the year is not divisible by 4, it is not a leap year.
- If the year is divisible by 4, it is a leap year.
- However, if the year is also divisible by 100, it is not a leap year.
- Unless the year is also divisible by 400, in which case it is a leap year.
This system keeps the Gregorian calendar closely aligned with Earth’s orbit around the Sun.
Do Other Calendars Use a Leap Year?
Yes, many other calendars use some form of leap year or leap adjustment to keep their calendars aligned with the Moon, the Sun, or the seasons. Different calendars solve this problem in different ways depending on whether they are solar, lunar, or lunisolar systems.
The Gregorian and Julian calendars use leap days by adding an extra day to February. The Julian calendar adds a leap day every 4 years without exceptions, while the Gregorian calendar uses more detailed rules to improve accuracy.
The Persian calendar also uses leap years, but it calculates them using precise astronomical observations, making it one of the most accurate solar calendars in use today.
Purely lunar calendars, such as the Islamic calendar, do not use leap years to stay aligned with the seasons because they intentionally follow the Moon’s cycles. However, the Islamic calendar does occasionally add an extra day to certain years to keep lunar months consistent.
Lunisolar calendars, such as the Hebrew and traditional Chinese calendars, use a different system: instead of adding a leap day, they sometimes add an entire leap month. This extra month helps keep holidays and seasons aligned with the solar year.
Learn more about what year it is in various calendars used throughout the world.