In what period did the timetable originated?
During what period did the calendar first developed?
In what period was the timetable emerge?
During what period did the timetable initially invented?
During what period did the timetable originally imagined?
In what period was the timetable firstly created?
During what period did the timetable inception?
In what period did the
schedule emerge for the first time?
- 04/13/01:39
- The history of calendars
