The Mesoamerican Calendar Ancient Shared Time KeepingIn what period was the agenda devised?
During what period did the schedule first established?
In which period did the agenda come into existence?
In what period did the schedule originally invented?
In which period did the calendar firstly conceived?
In what period was the calendar firstly devised?
During what period did the calendar
inception?
In which period did the calendar emerge for the first time?
