The Egyptians’ failure to account for the extra fraction of a day, however, caused their calendar to drift gradually into error. ![]() They constructed a calendar of 365 days, consisting of 12 months of 30 days each, with 5 days added at the year’s end. The Egyptians appear to have been the first to develop a solar calendar, using as a fixed point the annual sunrise reappearance of the Dog Star-Sirius, or Sothis-in the eastern sky, which coincided with the annual flooding of the Nile River. The months of the Gregorian calendar do not correspond to cycles of the Moon phase. The main other type of calendar is a lunar calendar, whose months correspond to cycles of Moon phases. The Gregorian calendar, widely accepted as a standard in the world, is an example of a solar calendar. ( Learn how and when to remove this template message)Ī solar calendar is a calendar whose dates indicate the season or almost equivalently the apparent position of the Sun relative to the stars. ![]() ( January 2017) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand.
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