What does bissextile mean?

Definitions for bissextile

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  1. bissextilenoun

    A leap year; A year having an extra day.

  2. bissextileadjective

    Having an extra day (of a leap year).

  3. Etymology: From bisextilis, from bisextus, from bis- + sextus. In leap years there were two sixth days before March in the Roman calendar, thus the succession of days was... 7 - 6 - 6* - 5...

Samuel Johnson's Dictionary

  1. Bissextilenoun

    Leap year; the year in which the day, arising from six odd hours in each year, is intercalated.

    Etymology: from bis, and sextilis, Lat.

    The year of the sun consisteth of three hundred and sixty five days and six hours, wanting eleven minutes; which six hours omitted, will, in time, deprave the compute; and this was the occasion of bissextile, or leap year. Thomas Browne, Vulgar Errours, b. iv. c. 12.

    Towards the latter end of February is the bissextile or intercalar day; called bissextile, because the sixth of the calends of March is twice repeated. William Holder, on Time.


  1. bissextile

    A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) added to keep the calendar year synchronized with the astronomical year or seasonal year. Because astronomical events and seasons do not repeat in a whole number of days, calendars that have a constant number of days in each year will unavoidably drift over time with respect to the event that the year is supposed to track, such as seasons. By inserting ("intercalating") an additional day (a "leap day") or month into some years, the drift between a civilization's dating system and the physical properties of the Solar System can be corrected. A year that is not a leap year is a common year. For example, in the Gregorian calendar, each leap year has 366 days instead of 365, by extending February to 29 days rather than the common 28. This extra leap day occurs in each year that is an integer multiple of 4 (except for years evenly divisible by 100, but not by 400). A leap year of 366 days has 52 weeks and two days, hence the year following a leap year will start later by two days of the week. In the lunisolar Hebrew calendar, Adar Aleph, a 13th lunar month, is added seven times every 19 years to the twelve lunar months in its common years to keep its calendar year from drifting through the seasons. In the Bahá'í Calendar, a leap day is added when needed to ensure that the following year begins on the March equinox. The term leap year probably comes from the fact that a fixed date in the Gregorian calendar normally advances one day of the week from one year to the next, but the day of the week in the 12 months following the leap day (from March 1 through February 28 of the following year) will advance two days due to the extra day, thus leaping over one day in the week. For example, Christmas Day (December 25) fell on a Friday in 2020, Saturday in 2021, Sunday in 2022, and will be on a Monday in 2023, but then will leap over Tuesday to fall on a Wednesday in 2024. The length of a day is also occasionally corrected by inserting a leap second into Coordinated Universal Time (UTC) because of variations in Earth's rotation period. Unlike leap days, leap seconds are not introduced on a regular schedule because variations in the length of the day are not entirely predictable. Leap years can present a problem in computing, known as the leap year bug, when a year is not correctly identified as a leap year or when February 29 is not handled correctly in logic that accepts or manipulates dates.

Webster Dictionary

  1. Bissextilenoun

    leap year; every fourth year, in which a day is added to the month of February on account of the excess of the tropical year (365 d. 5 h. 48 m. 46 s.) above 365 days. But one day added every four years is equivalent to six hours each year, which is 11 m. 14 s. more than the excess of the real year. Hence, it is necessary to suppress the bissextile day at the end of every century which is not divisible by 400, while it is retained at the end of those which are divisible by 400

  2. Bissextileadjective

    pertaining to leap year

Chambers 20th Century Dictionary

  1. Bissextile

    bis-sext′il, n. leap-year.—adj. containing the Bissext (L. bissextus), or extra day which the Julian calendar inserts in leap-year—the sixth before the kalends of March, 24th February. [L. bis, twice, and sextus, sixth.]

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  1. Chaldean Numerology

    The numerical value of bissextile in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of bissextile in Pythagorean Numerology is: 7

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"bissextile." Definitions.net. STANDS4 LLC, 2023. Web. 7 Dec. 2023. <https://www.definitions.net/definition/bissextile>.

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