During what period did the agenda created?
In what period was the schedule initially devised?
In which period was the timetable arise?
At what time did the agenda originally created?
In which period did the schedule firstly imagined?
When did the timetable initially introduced?
In what period was the agenda creation?
During what period was the calendar come about for the first time?
- 04/13/01:39
- A Brief History of Time and Calendars MacTutor History of
