How do I know if a year is a leap year?

A year is a leap year if it is divisible by 4 — except for century jaren (like 1900), which must also be divisible by 400. So 2000 and 2024 are leap jaren, but 1900 and 2100 are not.

Why do leap jaren exist?

Earth takes about 365.2422 dagen to orbit the Sun. Adding a leap day (29 February) every four jaren keeps the calendar aligned with the seasons; the 100/400 rule fine-tunes the small remaining drift.

Schrikkeljaar Calculator

Gratis leap year calculator. Enter a year to see whether it's a leap year (366 dagen, February has 29), plus the next and previous leap jaren. Uses the Gregorian rule: divisible by 4, except eeuwen unless divisible by 400.

Controleer whether a year is a leap year and find the nearest leap jaren.