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A leap year calculator determines whether a given year is a leap year based on the Gregorian calendar rules: divisible by 4, except centuries (divisible by 100), which must also be divisible by 400. The year 2000 was a leap year; 1900 was not. Leap year rules were needed because a solar year is approximately 365.2425 days.

Guide étape par étape

1. 1Input year
2. 2Apply leap year rules
3. 3Determine if 365 or 366 days

Exemples résolus

Erreurs courantes à éviter

• ✕Not double-checking results
• ✕Ignoring edge cases

Questions fréquentes