Leap Year Checker: instructions, examples and limits
A year is leap if divisible by 4, except centuries unless divisible by 400.
Open Leap Year CheckerThis tool is registered for local processing. Its tool input is handled in the current page; LittleKit’s product analytics do not include the input value.
What it does
A year is leap if divisible by 4, except centuries unless divisible by 400.
Worked example
2000 is leap; 1900 is not.
The example demonstrates the operation. For file-based tools, results depend on the selected file and options.How the result is produced
A year is leap if divisible by 4, except centuries unless divisible by 400.
Important limits
Uses proleptic Gregorian rules, including years before local Gregorian adoption.
Choosing the next step
Use a calendar-date tool when the question is about dates on a page, and a duration tool when elapsed clock time matters. For a deadline across time zones, convert the times explicitly before relying on a local-device result.
See a mismatch between these instructions and the tool? Report a correction with a non-sensitive example.