During what period was the calendar devised?
At what
time was the agenda initially developed?
In which period did the calendar emerge?
In what period was the timetable initially created?
During what period was the timetable originally imagined?
During what period did the agenda initially established?
At what time did the schedule generation?
In which period was the schedule arise for the first time?
- 04/13/01:39
- The Mesoamerican Calendar article
