Leap Year

What is a Leap Year?

A leap year is a year with one additional day, which is added in order to keep synchronized with the astronomical year. Seasons of the year and astronomical events do not repeat in a whole number of days so it is necessary to add an extra day every few years to catch up with the astronomical year.

In the Gregorian calendar we use today a leap year has 366 days instead of 365. An extra day is added every four years at the end of February, so it has 29 days instead of 28. It is necessary because the solar (astronomical) year is a bit longer than 365 days — it has 365 days and almost 6 hours, i.e. it has approximately 365.25 days.

Calculator to check if a year is a leap year

Please enter a year in the following form and our calculator will check for you if the entered year is a leap year, i.e. it is 366 days long. It is necessary to have the JavaScript turned on in your browser in order for the calculator to work.

Which years are leap?

In our calendar (Gregorian) a leap year is a year which is both evenly divisible by 4 and not divisible by 100 or just is evenly divisible by 400.

For example:

  • 1996 year is a leap year because it is divisible by 4 and not divisible by 100;
  • 1800 year is not a leap year because it is divisible by 4, but also by 100;
  • 2000 year is a leap year because it is divisible by 400.

When is the next leap year?

The current year 2014 is not leap year. The following nearest years are leap:

  • 2016
  • 2020
  • 2024
  • 2028
  • 2032
  • 2036
  • 2040
  • 2044
  • 2048
  • 2052