In which period was the agenda created?
When did the timetable first introduced?
At what time did the calendar come into existence?
In which period was the schedule originally devised?
During what
period did the calendar firstly thought up?
In what period did the agenda firstly introduced?
During what period was the schedule generation?
In what period was the timetable arise for the first time?
Le calendrier mésoaméricain ancien temps partagé