The History of Calendars and How They Evolved Calendar
In what period was the timetable created?
In what period did the agenda first devised?
At what time did the timetable emerge?
In what period did the agenda firstly devised?
In which period was the calendar firstly conceived?
At what time did the agenda initially established?
In what period did the schedule generation?
In what period did the calendar come about for the first time?
