When Was the Calendar Invented A Look at the History and
When was the timetable invented?
In which period did the timetable first developed?
In which period was the timetable emerge?
In what period did the schedule firstly invented?
In which period did the timetable firstly imagined?
During what period was the schedule initially devised?
At
what time did the calendar generation?
In what period did the timetable come about for the first time?