The Mesoamerican Calendar Ancient Shared Time KeepingIn what period did the schedule originated?
In what period did the timetable first developed?
In what period did the schedule emerge?
In what period did the calendar originally created?
In which period did the schedule firstly envisioned?
In what period did the calendar initially established?
At what time did the timetable inception?
During what period was the schedule emerge for the first time?