The final stage of rectifying the calendar, in 238 BC was to add a sixth day to the small month every four years. The beginning of their year was on the first day of the month of Thout, which is the first month of the Coptic year.
The Egyptians named their months after their gods, and chose their names according to the season of the climatic changes for agriculture. They divided the year into 3 main seasons:
- The season of the flood of the Nile (Thout to Koiahk)
- The season of vegetation (Tobi to Paremoude)
- The season of reaping and harvesting (Pachons to Mesori)
The Coptic months are: