It is estimated that, as early as 300 BC, the Borana/Oromo people of the upper Nile, in today's Ethiopia, had a highly advanced 12 month calendar, based on a sophisticated system of astronomy. The ability to create and interpret the calendar was the domain of specialists known as the Ayantu. See links below:
http://en.wikipedia.org/wiki/Oromo_people
http://ardajila.com/?page_id=561
Awori Achoka
awori.achoka@gmail.com
http://en.wikipedia.org/wiki/Oromo_people
http://ardajila.com/?page_id=561
Awori Achoka
awori.achoka@gmail.com