Mesoamerican calendars WikipediaWhen was the schedule devised?
During what period was the calendar initially established?
In which period was the calendar come into existence?
In what period was the agenda initially invented?
In which period did the calendar firstly envisioned?
During what period was the timetable firstly established?
In what period did the schedule inception?
During what period did the calendar arise for the first time?
- 04/13/01:39
- Gregorian calendar Wikipedia
