In what period did the agenda devised?
When did the timetable initially introduced?
During what period was
the timetable come into existence?
During what period did the calendar firstly invented?
During what period did the schedule firstly thought up?
In what period did the timetable firstly introduced?
In what period did the agenda generation?
When did the calendar come about for the first time?
A Brief History of Time and Calendars MacTutor History of
