bissextile year

• Année qui comporte un jour supplémentaire (le 29 février) pour aligner le calendrier sur l'année astronomique, survenant tous les quatre ans.

A year that contains an extra day (February 29) to keep the calendar year synchronized with the astronomical year, occurring every four years.

1. Leap yearC1formal

   A year that contains an extra day (February 29) to keep the calendar year synchronized with the astronomical year.

   année bissextile

   • The year 2024 is a bissextile year.
   • Bissextile years occur every four years.
   • The concept of a bissextile year was introduced by Julius Caesar.