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  2. Egyptian calendar - Wikipedia

    en.wikipedia.org/wiki/Egyptian_calendar

    The Nile flood at Cairo c. 1830.. Current understanding of the earliest development of the Egyptian calendar remains speculative. A tablet from the reign of the First Dynasty pharaoh Djer (c. 3000 BC) was once thought to indicate that the Egyptians had already established a link between the heliacal rising of Sirius (Ancient Egyptian: Spdt or Sopdet, "Triangle"; Ancient Greek: Σῶθις ...

  3. Egyptian astronomy - Wikipedia

    en.wikipedia.org/wiki/Egyptian_astronomy

    The rising of Sirius (Egyptian: Sopdet, Greek: Sothis) at the beginning of the inundation was a particularly important point to fix in the yearly calendar. [5] One of the most important Egyptian astronomical texts was the Book of Nut , going back to the Middle Kingdom or earlier.

  4. Sothic cycle - Wikipedia

    en.wikipedia.org/wiki/Sothic_cycle

    A heliacal rise of Sirius was recorded by Censorinus as having happened on the Egyptian New Year's Day between 139 CE and 142 CE. [3] The record itself actually refers to 21 July 140 CE, but astronomical calculation definitely dates the heliacal rising at 20 July 139 CE, Julian. This correlates the Egyptian calendar to the Julian calendar.

  5. Egyptian chronology - Wikipedia

    en.wikipedia.org/wiki/Egyptian_chronology

    The majority of Egyptologists agree on the outline and many details of the chronology of Ancient Egypt. This scholarly consensus is known as the Conventional Egyptian chronology , which places the beginning of the Old Kingdom in the 27th century BC, the beginning of the Middle Kingdom in the 21st century BC and the beginning of the New Kingdom ...

  6. 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 ...

  7. Talk:Egyptian calendar - Wikipedia

    en.wikipedia.org/wiki/Talk:Egyptian_calendar

    Because the ancient Egyptian calendar does not have leap days while the Julian calendar does have leap days, it cannot begin on any fixed Julian date like July 19. Instead, the beginning of the ancient Egyptian calendar wanders through the seasons and the Julian calendar, taking 1460 years for Thoth 1 to return to the same Julian date.

  8. Category:Egyptian calendar - Wikipedia

    en.wikipedia.org/wiki/Category:Egyptian_calendar

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  9. History of calendars - Wikipedia

    en.wikipedia.org/wiki/History_of_calendars

    The ancient Athenian calendar was a lunisolar calendar with 354-day years, consisting of twelve months of alternating length of 29 or 30 days. To keep the calendar in line with the solar year of 365.242189 days, an extra, intercalary month was added in the years: 3, 6, 8, 11, 14, 17, 19 of the 19-years Metonic cycle.