Leap Years Between Years
How to use leap years between years
- Enter a starting year.
- For a range, also enter an ending year on or after it.
- Read the matching years and the century rule used.
List all Gregorian leap years within an inclusive start-year and end-year range.
How the result is calculated
The calculator validates the required dates, units and range before producing a result. Keep the inputs and the selected convention with the output so another person can reproduce it.
Read all calculation conventionsHow to read your result
Keep the inputs and conventions beside the answer. These values explain what the result measures.
| Result field | Meaning |
|---|---|
| Next-on-or-after year | The starting year is returned if it already satisfies the leap-year rule. |
| Range list | Every matching year inside the inclusive year boundaries. |
| Century exception | A year divisible by 100 needs divisibility by 400 to qualify. |
2100 breaks the four-year shortcut
2096 is a leap year. 2100 is not divisible by 400 and is not a leap year. The next leap year after 2096 is 2104.
Try the example in the calculator above. Change one input at a time and compare the target, interval and selected rules. For a longer explanation read Leap Years and Month-End Dates: How Calendar Math Works.
Conventions to keep with your result
Years use Gregorian rules from 0001 through 9999. Historical local transitions between calendar systems are outside this model.
Leap Years Between Years: frequently asked questions
Is the starting year included?
Yes. If it is a leap year, the next-on-or-after result returns it.
Why is 2400 a leap year?
It is divisible by 400, so the century exception allows February 29.
Are the range endpoints included?
Yes. Both entered years belong to the examined range.
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