- Leap years exist in order to keep the seasons from drifting in time during the calendar year. During a leap year, the calendar includes an extra day, February 29.
- Leap years occur every 4 years except for century years that are not divisible by 400 (such as 2000).
- The concept of a leap year was introduced by the Julian calendar in 46 BCE, which repeated February 24 every four years.
- The leap in leap year refers to how a calendar day figuratively “leaps” forward a day of the week during a leap year.
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2 comments:
I didn't know the English term for the Spanish "bisiesto". Neither did I know its Latin origin - “bis sextus dies ante Kalendas Martii”, “repeated twice on the sixth day before March 1” - So the Romans had two days with the same number every four years! Isn't it amazing?
It is!
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