[HIGHLIGHTS] February 29, why and since when have there been leap years?

February 29, why and since when have there been leap years?. The year 2024 is a leap year and therefore has 366 days instead of 365.

The name leap day comes from the Latin "ante diem bis sextum Kalendas Martias" meaning sixth day before the kalends of March in French. In France, 27,832 people have been born on February 29 since 1968, according to INSEE data. The additional day will finally be added at the end of February, on the 29th day, with the transition to the Gregorian calendar.