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