2025 – 1947. Use this leap year calculator to easily check if a given year is a leap year or not, and to count and list all leap years in a selected time period. Enter a start date and an end date and we'll automatically count the years and days between the start and end date.

This calculator is designed to provide a comprehensive breakdown of the time between any two given dates. Date plus or minus date parts (years, months, days, weeks, hours, minutes, seconds), time zone conversion.