bissextile year

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bissextile year

A bissextile year has an extra day in February.

Definition
  1. Noun:
    • A leap year in the Gregorian calendar system: A bissextile year is a year containing one extra day (February 29th) to synchronize the calendar year with the astronomical or seasonal year. Specifically, it is any year whose number is divisible by four, except for end-of-century years (years divisible by 100), which must also be divisible by 400 to be a bissextile year.
Usage and Examples
  • Noun:
    • The year 2024 is a bissextile year, so February has 29 days.
    • According to the rule, the year 1900 was not a bissextile year, but the year 2000 was.
Advanced Usage
  • The term originates from the Latin "bis sextus dies ante calendas Martias" (the doubled sixth day before the March calends), referring to how the extra day was inserted in the Roman calendar.
  • In technical or historical contexts, is the precise term, while is the common, general term.
Variants and Related Words
  • Leap year (n): The common synonym for .
  • Bissextile (adj): The adjectival form, meaning "pertaining to a leap year" (e.g., ).
Synonyms
  • Leap year
Antonyms
  • Common year (a year that is not a leap year).
bissextile year

A bissextile year has an extra day in February.

Noun
  1. in the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400

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