I’m turning my attention from player characters to the world of Atlantean Exodus. One thing the Atlanteans bring with them from Atlantis is their calendar. The calendar is based on the Egyptian sidereal-solar calendar found in the Book of Nut, an ancient Egyptian astronomical text.
A week consists of 10 days; these 10 days correspond to ~10 degrees of the night sky and the appearance of certain stars on the horizon.
A month consists of three weeks. These are not lunar months. The Egyptians did have lunar (and several other) calendars with regional variations, and celebrated certain festivals and religious ceremonies according to that calendar.
Twelve months make up a year, plus a 5 or 6 day intercalary period.
Thus, each year is 365 days (plus one day every four years). Historically, the Egyptians did not add an additional day added every four years, leading to gradual calendar misalignment and realignment every 1461 years. I’m treating the leap year days as forgotten knowledge that the Atlanteans still retained but lost over a period of thousands of years.
Each year is divided into seasons. The Egyptians used the Nile and its changes to demarcate the seasons, but in the case of the Atlanteans traversing the green Sahara, their seasons are divided into wet and dry seasons, plus a short season of storms at the end of the dry season.
At this time, some tribes of Africa have developed their own calendars, making the prediction of seasonal changes and thus early agriculture possible.
