Ancient Egyptian Calendar

Ancient Egyptian Calendar

The cycles of the moon played an important role in the religious thinking of the Egyptians. Other periods found using the Rayleigh Test are connected to the civil calendar, the mythological symbolism of the twelfth hour of the day and possibly the period of variation of the star Algol.
(Sebastian Porceddu, Lauri Jetsu, Tapio Markkanen and Jaana Toivari-Viitala (2008). Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days. Cambridge Archaeological Journal, 18, pp 327-339)