A perennial calendar is a calendar that applies to any year, keeping the same dates, weekdays and other features.
Perennial calendar systems differ from most widely used calendars which are annual calendars. Annual calendars include features particular to the year represented, and expire at the year's end. A perennial calendar differs also from a perpetual calendar, which is a tool or reference to compute the weekdays of dates for any given year, or for representing a wide range of annual calendars.
For example, most representations of the Gregorian calendar year include weekdays and are therefore annual calendars, because the weekdays of its dates vary from year to year. For this reason, proposals to perennialize the Gregorian calendar typically introduce one or another scheme for fixing its dates on the same weekdays every year.
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A perennialcalendar is a calendar that applies to any year, keeping the same dates, weekdays and other features. Perennialcalendar systems differ from...
in 1902. The International Fixed Calendar divides the year into 13 months of 28 days each. A type of perennialcalendar, every date is fixed to the same...
allowing benefits of a perennialcalendar to be shared by all. Some calendar reform ideas, such as the Pax Calendar, Symmetry454 calendar and the Hanke–Henry...
of Brooklyn, New York in 1930. The World Calendar is a 12-month, perennialcalendar with equal quarters. Each quarter begins on a Sunday and ends on a...
The Pax calendar was invented by James A. Colligan, SJ in 1930, as a perennializing reform of the annualized Gregorian calendar. The common year is divided...
proposed reforms to the civil calendar, in order to achieve a perennialcalendar. Some, however, such as the ISO week date calendar, are simply conveniences...
and July 1 on leap years. This model would be a perennialcalendar, with each date occurring perennially on the same day of the week. Grosclaude lists many...
for the next year. With perennialcalendars, the same representation of the year serves for every year. Perpetual calendars, in this context, are computation...
the International Fixed Calendar and the Pax Calendar. Technically, these are not perpetual calendars but perennialcalendars. Their purpose, in part...
Symmetry454 calendar (Sym454) is a proposal for calendar reform created by Irv Bromberg of the University of Toronto, Canada. It is a perennial solar calendar that...
Caryophyllaceae, native to central and eastern Europe. It is an herbaceous perennial growing to 1.2 m (4 ft) tall and wide, with mounds of branching stems...
The Mesoamerican Long Count calendar is a non-repeating base-20 and base-18 calendar used by several pre-Columbian Mesoamerican cultures, most notably...
The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica and in many modern communities in the Guatemalan highlands, Veracruz, Oaxaca...
always falls on a Wednesday). The calendar is the same every year (perennial), unlike the annual Gregorian calendar, which differs from year to year....
org. Retrieved 12 July 2021. FORSTER (F.L.S.), Thomas (1824). The PerennialCalendar, and Companion to the Almanack; Illustrating the Events of Every Day...
Gregorian Calendar. The plan was to have every new year beginning on Sunday, in order to achieve a perennialcalendar. In common years, the new calendar would...
breeds and varieties. Some methods use an astrological sowing and planting calendar. Biodynamic agriculture uses various herbal and mineral additives for compost...
the end-date of a 5,126-year-long cycle in the Mesoamerican Long Count calendar, and festivities took place on 21 December 2012 to commemorate the event...
two desk calendar books, Essentially Lilly 2005 Social Butterfly Engagement Calendar and Essentially Lilly 2006 Party Animal Engagement Calendar. She was...
Though no standard exists, numerous calendars and other timekeeping approaches have been proposed for the planet Mars. The most commonly seen in the scientific...
sexual behavior of these creatures is extensively depicted. There is a perennial question among readers as to whether the views contained in a story reflect...
Calendula (/kəˈlɛndjuːlə/) is a genus of about 15–20 species of annual and perennial herbaceous plants in the daisy family, Asteraceae that are often known...
how many miles the ship travels every day, despite the facts that he perennially loses, that he cannot afford to match the stakes set by others such as...
India After Gandhi: The History of the World's Largest Democracy. Harper Perennial. p. 320. Kaminsky, Arnold P.; Long, Roger D. (23 September 2011). India...
and locking out all but one of the 15 podium positions between them. Perennial title favourite Marc Márquez made his return to the series at the third...
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