These have been reviewed recently by H. E. Winlock (“The Origin of the Ancient Egyptian Calendar”. Proc. American Philosophical Soc., 83, No. 3; 1940), introducing a further suggestion as to ...

According to Live Science, the discovery sheds new light on the ancient Egyptian celebration of Wepet Renpet, or the Opening of the Year, a festival that was central to their culture and calendar.

Each month is introduced by its number in the sequence of 12 months in the Egyptian calendar, with the ancient Egyptian name of the month in an early New Kingdom list, the late New Kingdom month name, ...

Each month is introduced by its number in the sequence of 12 months in the Egyptian calendar, with the ancient Egyptian name of the month in an early New Kingdom list, the late New Kingdom month name, ...

The Egyptian calendar was created around 4,800 years ago. It had 365 days in a year but no leap year. Therefore, the day of Wepet Renpet was subject to change based on the climactic seasons.