The Mesoamerican Calendar article In which period did the timetable originated?
At what time did the schedule initiallyestablished?
During what period was the schedule come into existence?
In which period did the timetable firstly created?
During what period did the agenda initially imagined?
In which period was the timetable initially established?
At what time was the agenda generation?
In which period did the schedule arise for the first time?
