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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 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 ...

  4. Season of the Emergence - Wikipedia

    en.wikipedia.org/wiki/Season_of_the_Emergence

    In the lunar calendar, each began on a dawn when the waning crescent moon was no longer visible. In the civil calendar, each consisted of exactly 30 days [8] divided into three 10-day weeks known as decans. In ancient Egypt, these months were usually recorded by their number within the season: I, II, III, and IV Prt.

  5. 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.

  6. Flooding of the Nile - Wikipedia

    en.wikipedia.org/wiki/Flooding_of_the_Nile

    The Egyptian year was divided into the three seasons of Akhet (Inundation), Peret (Growth), and Shemu (Harvest). Akhet covered the Egyptian flood cycle. This cycle was so consistent that the Egyptians timed its onset using the heliacal rising of Sirius, the key event used to set their calendar.

  7. 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 ...

  8. Scientists Finally Solved the Mystery of How the Mayan ...

    www.aol.com/scientists-finally-solved-mystery...

    The Mayan calendar’s 819-day cycle has confounded scholars for decades, but new research shows how it matches up to planetary cycles over a 45-year span

  9. Season of the Inundation - Wikipedia

    en.wikipedia.org/wiki/Season_of_the_Inundation

    In the lunar calendar, each began on a dawn when the waning crescent moon was no longer visible. In the civil calendar, each consisted of exactly 30 days [3] divided into three 10-day weeks known as decans. In ancient Egypt, these months were usually recorded by their number within the season: I, II, III, and IV Ꜣḫt.