leap year

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leap year

  • /ˈliːp ˌjɪə/ UK
  • /ˈlip ˌjɪ(ə)ɹ/ US

Where it comes from

PIE word

*yóh₁r̥

From Late Middle English lepe-yer, lep-yer (“year with 366 days, leap year”), from lep, lepe (“act of jumping, jump, leap”) (from Old English hlīep, hlȳp, probably ultimately from Proto-Indo-European *klewp- (“to spring; to stumble”)) + yer (“calendrical unit based on a complete revolution of the Earth around the Sun, year”) (from Old English ġēar, ultimately from Proto-Indo-European *yóh₁r̥ (“year”)). The English term is analysable as leap (noun) + year, and possibly relates to the phenomenon that any fixed date of a 365-day calendar advances one weekday each year but every date of a 366-day year after February 29 (often seen as the leap day) advances by two weekdays instead. For example, Christmas (December 25) fell on a Saturday in 2004, a Sunday in 2005, a Monday in 2006, and a Tuesday in 2007 but then “leapt” over Wednesday to fall on a Thursday in 2008 which was a leap year.

Compare also Old English mōnan hlȳp (“moon’s leap”) and Medieval Latin saltus lūnae (literally “leap moon”), an additional day added every 19 years (a Metonic cycle) to bring the lunar and solar calendars into alignment.

Cognates

* Old Norse hlaup-ár (“leap year”)

noun leap years · leapyear

  1. A year in the Julian or Gregorian calendar with an intercalary day added to February (in the Gregorian calendar, February 29), used to adjust for the extra hours of the solar year; a 366-day year. The additional day which occurred every fourth year [after the Julian Reform] was given to February, as being the shortest month, and was inserted in the calendar between the twenty-fourth and twenty-fifth day. February having then twenty-nine days, the twenty-fifth was the sixth of the calends of M

    Similar: bissext, bissextile, bissextile year, intercalary year

  2. broadly Any other year featuring intercalation, such as a year in a lunisolar calendar with 13 months instead of 12, used to maintain its alignment with the seasons of the solar year.

Translations

Every language

noun year in the Julian or Gregorian calendars with an intercalary day added to February

Españolaño bisiesto, bisiesto
한국어윤년 yunnyeon
日本語閏年
中文閏年 /闰年 rùnnián
हिन्दीअधिवर्ष adhivarṣ, लीप वर्ष līp varṣ
Portuguêsano bissexto
Françaisannée bissextile
DeutschSchaltjahr
Italianoanno bisestile
Ελληνικάδίσεκτο έτος dísekto étos
Românăan bisect, an bisectil
Русскийвисоко́сный год visokósnyj god
Tiếng Việtnăm nhuận, năm nhuần
العربيةسَنَة كَبِيسَة
עבריתשנה מעוברת shaná meubéret

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MLA

"leap year." Wiktionary, via Micwyn, micwyn.com/word/leap%20year. Accessed 6 Nov. 2026.

APA

leap year. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/leap%20year

Chicago

"leap year." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/leap%20year.

BibTeX
@misc{leap_year_2026,
  title = {leap year},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/leap%20year},
  urldate = {2026-11-06}
}