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Ancient Egyptian sundial (c. 1500 BC), from the Valley of the Kings, used for measuring work hour. Daytime divided into 12 parts. The ancient Egyptians were one of the first cultures to widely divide days into generally agreed-upon equal parts, using early timekeeping devices such as sundials, shadow clocks, and merkhets (plumb-lines used by early astronomers).
The ancient Egyptian calendar – a civil calendar – was a solar calendar with a 365-day year. The year consisted of three seasons of 120 days each, plus an intercalary month of five epagomenal days treated as outside of the year proper. Each season was divided into four months of 30 days.
An Egyptian method of determining the time during the night, used from at least 600 BC, was a type of plumb-line called a merkhet. A north–south meridian was created using two merkhets aligned with Polaris, the north pole star. The time was determined by observing particular stars as they crossed the meridian. [24]
It was used to track the alignment of certain stars called decans or "baktiu" in the Ancient Egyptian. When visible, the stars could be used to measure the time at night. There were 10 stars for the 10 hours of the night; the day had a total of 24 hours including 12 hours for the day, 1 hour for sunset, and 1 hour for sunrise.
This means the Egyptian Chronology actually comprises three floating chronologies. The chronologies of Mesopotamia, the Levant and Anatolia depend significantly on the chronology of Ancient Egypt. To the extent that there are problems in the Egyptian chronology, these issues will be inherited in chronologies based on synchronisms with Ancient ...
Out of Egyptian myths such as those around Ra and the sky goddess Nut came the development of the Egyptian calendar, time keeping, and even concepts of royalty. An astronomical ceiling in the burial chamber of Ramesses VI shows the sun being born from Nut in the morning, traveling along her body during the day and being swallowed at night.
The ancient Egyptian Sun hieroglyph is Gardiner sign listed no. N5 for the sun-disc; [1] it is also one of the hieroglyphs that refers to the god Ra. The sun hieroglyph is used in the ancient Egyptian language hieroglyphs as a determinative to refer to events of time, for example when referring to '"day xx" (of month yy') .
Kammerzell, Frank (2005). "Old Egyptian and Pre-Old Egyptian: Tracing linguistic diversity in Archaic Egypt and the creation of the Egyptian language". In Seidlmayer, Stephan Johannes (ed.). Texte und Denkmäler des ägyptischen Alten Reiches. Thesaurus Linguae Aegyptiae. Vol. 3. Berlin: Brandenburgische Akademie der Wissenschaften. pp. 165– 247.