perpetual calendar

perpetual calendar
1. a calendar devised to be used for many years, as in determining the day of the week on which a given date falls.
2. a desk calendar with months, days, and dates that can be changed, as by adjusting various dials, so that it may be used over and over for many years.
[1890-95]

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      type of dating system that makes it possible to find the correct day of the week for any date over a wide range of years. Aspects of the perpetual calendar can be found in the Jewish religious and the Julian calendars, and some form of it has appeared in proposed calendar reforms. The 19th-century French philosopher Auguste Comte (Comte, Auguste), for example, proposed a calendar of 13 months of 28 days each, with an extra day (Year Day) inserted between December 28 and January 1 each year and with an additional leap-year day periodically. More recently, reformers promoted the World Calendar, consisting of 12 months divided into 30 and 31 days, with an annual “year-end” day and a periodic leap-year day.

       Perpetual calendar Perpetual calendarTo find the day of the week for any Gregorian or Julian date in the perpetual calendar provided in the Table (Perpetual calendar), first find the proper dominical letter (one of the letters A through G) for the year in the upper Table (Perpetual calendar). Leap years have two dominical letters, the first applicable to dates in January and February, the second to dates in the remaining months. Then find the same dominical letter in the lower table, in whichever column it appears opposite the month in question. The days then fall as given in the lowest section of the column.

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Universalium. 2010.

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Look at other dictionaries:

  • Perpetual calendar — Perpetual Per*pet u*al, a. [OE. perpetuel, F. perp[ e]tuel, fr. L. perpetualis, fr. perpetuus continuing throughout, continuous, fr. perpes, etis, lasting throughout.] Neverceasing; continuing forever or for an unlimited time; unfailing;… …   The Collaborative International Dictionary of English

  • Perpetual calendar — Calendar Cal en*dar, n. [OE. kalender, calender, fr. L. kalendarium an interest or account book (cf. F. calendrier, OF. calendier) fr. L. calendue, kalendae, calends. See {Calends}.] 1. An orderly arrangement of the division of time, adapted to… …   The Collaborative International Dictionary of English

  • Perpetual calendar — Per*pet u*al cal en*dar A calendar that can be used perpetually or over a wide range of years. That of Capt. Herschel covers, as given below, dates from 1750 to 1961 only, but is capable of indefinite extension. PERPETUAL CALENDARDay of the… …   The Collaborative International Dictionary of English

  • perpetual calendar — n. 1. a calendar mathematically arranged so that the correct day of the week can be determined for any given date over a wide range of years 2. a desk calendar adjustable for each of many years …   English World dictionary

  • Perpetual calendar — A perpetual calendar is a calendar which is good for a span of many years, such as the Runic calendar. General information For the Gregorian calendar, a perpetual calendar often consists of 14 one year calendars, plus a table to show which one… …   Wikipedia

  • perpetual calendar — noun a calendar in which the day, the month, and the date are adjusted independently to show any combination of the three …   English new terms dictionary

  • perpetual calendar — perpet′ual cal′endar n. hor a calendar devised to be used for many years, as one for determining the day of the week on which a given date falls • Etymology: 1890–95 …   From formal English to slang

  • perpetual calendar — noun a chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years • Hypernyms: ↑calendar …   Useful english dictionary

  • perpetual calendar — noun Date: 1895 a table for finding the day of the week for any one of a wide range of dates …   New Collegiate Dictionary

  • Perpetual — Per*pet u*al, a. [OE. perpetuel, F. perp[ e]tuel, fr. L. perpetualis, fr. perpetuus continuing throughout, continuous, fr. perpes, etis, lasting throughout.] Neverceasing; continuing forever or for an unlimited time; unfailing; everlasting;… …   The Collaborative International Dictionary of English

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