Ancient egyptian dating system

Rated 4.16/5 based on 661 customer reviews

It was based on a period of 25 civil years which was approximately equal 309 lunar months.An attempt to reform the calendar to include a leap year was made at the beginning of the Ptolemaic dynasty (Decree of Canopus, 239 BCE), but the priesthood was too conservative to allow such a change.

At midday, when the sun was at its highest, the shadow clock would be reversed and hours counted down to dusk.Ancient Egypt was run according to three different calendars.The first was a lunar calendar based on 12 lunar months, each of which began on the first day in which the old moon crescent was no longer visible in the East at dawn.(inundation) occurred at the heliacal rising of a star they called Serpet (Sirius).It has been calculated that this sidereal year was only 12 minutes longer than the mean tropical year which influenced the flooding, and this produced a difference of only 25 days over the whole of Ancient Egypt's recorded history.

Leave a Reply