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  2. International Fixed Calendar - Wikipedia

    en.wikipedia.org/wiki/International_Fixed_Calendar

    The calendar year has 13 months with 28 days each, divided into exactly 4 weeks (13 × 28 = 364). An extra day added as a holiday at the end of the year (after December 28, i.e. equal to December 31 Gregorian), sometimes called "Year Day", does not belong to any week and brings the total to 365 days.

  3. Calendar reform - Wikipedia

    en.wikipedia.org/wiki/Calendar_reform

    The Hermetic Lunar Week Calendar is a lunisolar calendar proposal which has 12 or 13 lunar months of 29 or 30 days a year, and begins each year near the vernal equinox. [ 9 ] The Meyer–Palmen Solilunar Calendar has 12 lunar months with 29 or 30 days plus a leap month called Meton every 3 or 2 years with 30 or 31 days. 60 years together are ...

  4. Positivist calendar - Wikipedia

    en.wikipedia.org/wiki/Positivist_calendar

    The positivist calendar was a calendar reform proposal by Auguste Comte in 1849. Revising the earlier work of Marco Mastrofini, or an even earlier proposal by "Hirossa Ap-Iccim" (), Comte developed a solar calendar with 13 months of 28 days, and an additional festival day commemorating the dead, totalling 365 days.

  5. List of calendars - Wikipedia

    en.wikipedia.org/wiki/List_of_calendars

    Solar calendar with 13 months of 28 days. Badí‘ calendar: solar: Baháʼí: 1873: Baháʼí: Uses a year of 19 months of 19 days each and a 1844 era. Also known as the "Baháʼí Calendar" or the "Wondrous Calendar". Thai solar calendar: solar: Gregorian: 1888: Thailand: The Gregorian calendar but using the Buddhist Era (543 BC) Invariable ...

  6. Hanke–Henry Permanent Calendar - Wikipedia

    en.wikipedia.org/wiki/Hanke–Henry_Permanent...

    Hanke–Henry Permanent Calendar pre-2016 version with weeks still starting Sunday, but Xtra already at the end of the year. In 2004, Richard Conn Henry, a professor of astronomy at Johns Hopkins University, proposed the adoption of a calendar known as Common-Civil-Calendar-and-Time (CCC&T), which he described as a modification to a proposal by Robert McClenon.

  7. Dreamspell - Wikipedia

    en.wikipedia.org/wiki/Dreamspell

    In most 13-month calendars, the leap year day is added every four years as an intercalary day between the year end day and the New Year's Day. However, doing this to the Dreamspell 13 Moon calendar would bring the calendar out of sync with the 52-year cycle where the galactic signature and day of the year return every 52 years.

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