Intercalary month (Egypt)
Calendar day outside any regular month in ancient Egyptian, Coptic, and Ethiopian calendars / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Intercalary month (Egypt)?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
Not to be confused with the pre-Islamic concept mentioned in the Quran, known as Nasi'.
See also: Intercalation (timekeeping)
The intercalary month or epagomenal days[1] of the ancient Egyptian, Coptic, and Ethiopian calendars are a period of five days in common years and six days in leap years in addition to those calendars' 12 standard months, sometimes reckoned as their thirteenth month. They originated as a periodic measure to ensure that the heliacal rising of Sirius would occur in the 12th month of the Egyptian lunar calendar but became a regular feature of the civil calendar and its descendants. Coptic and Ethiopian leap days occur in the year preceding Julian and Gregorian leap years.