In which period was the agenda invented?
During what period was the agenda initially introduced?
In which period did the schedule come into existence?
In which period was the calendar firstly created?
In which period was the calendar firstly conceived?
In which period was the timetable initially devised?
During what period was the calendar inception?
During what period was the agenda arise for the first time?
- 04/13/01:39
- The history of calendars
