In which period did the agenda devised?
In what period did the calendar initially devised?
At what time did the timetable arise?
In what period did the timetable firstly invented?
In which period was the schedule originally thought up?
In which period was the calendar firstly introduced?
At what time was the agenda inception?
In which period was the calendar come about for the first time?
- 04/13/01:39
- Who Invented the Calendar A History of the Calendar
