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  2. History of calendars - Wikipedia

    en.wikipedia.org/wiki/History_of_calendars

    [clarification needed] [7] The site is found near the world's oldest known site of permanent aquaculture. A mesolithic arrangement of twelve pits and an arc found in Warren Field, Aberdeenshire, Scotland, dated to roughly 8,000 BC, has been described as a lunar calendar and was dubbed the "world's oldest known calendar" in 2013. [8]

  3. Warren Field - Wikipedia

    en.wikipedia.org/wiki/Warren_Field

    Warren Field is the location of a mesolithic calendar monument built about 8,000 BCE. [1] It includes 12 pits believed to correlate with phases of the Moon and used as a lunisolar calendar. [2] It is considered to be the oldest lunisolar calendar yet found. [3] [4] [5] It is near Crathes Castle, in the Aberdeenshire region of Scotland, in the ...

  4. List of calendars - Wikipedia

    en.wikipedia.org/wiki/List_of_calendars

    This is a list of calendars.Included are historical calendars as well as proposed ones. Historical calendars are often grouped into larger categories by cultural sphere or historical period; thus O'Neil (1976) distinguishes the groupings Egyptian calendars (Ancient Egypt), Babylonian calendars (Ancient Mesopotamia), Indian calendars (Hindu and Buddhist traditions of the Indian subcontinent ...

  5. Lunar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunar_calendar

    A lunisolar calendar was found at Warren Field in Scotland and has been dated to c. 8000 BC, during the Mesolithic period. [2] [3] Some scholars argue for lunar calendars still earlier—Rappenglück in the marks on a c. 17,000 year-old cave painting at Lascaux and Marshack in the marks on a c. 27,000 year-old bone baton—but their findings remain controversial.

  6. Crathes Castle - Wikipedia

    en.wikipedia.org/wiki/Crathes_Castle

    The find was analysed in 2013 and is considered to be the world's oldest known lunar calendar dating from 8000 BC to about 4000 BC. [11] This dating would make the structure up to five thousand years older [ 11 ] than previously recorded time-measuring monuments in Mesopotamia .

  7. History of astronomy - Wikipedia

    en.wikipedia.org/wiki/History_of_astronomy

    Twelve lunar months pass in 354 days, requiring a calendar to insert a leap month every two or three years in order to keep synchronized with the solar year's seasons (making it lunisolar). The earliest known descriptions of this coordination were recorded by the Babylonians in 6th or 7th centuries BC, over one thousand years later.

  8. Ancient Greek calendars - Wikipedia

    en.wikipedia.org/wiki/Ancient_Greek_calendars

    Various ancient Greek calendars began in most states of ancient Greece between autumn and winter except for the Attic calendar, which began in summer.. The Greeks, as early as the time of Homer, appear to have been familiar with the division of the year into the twelve lunar months but no intercalary month Embolimos or day is then mentioned, with twelve months of 354 days. [1]

  9. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    As megalithic civilizations left no recorded history, little is known of their timekeeping methods. [3] The Warren Field calendar monument is currently considered to be the oldest lunisolar calendar yet found. Mesoamericans modified their usual vigesimal (base-20) counting system when dealing with calendars to produce a 360-day year. [4]