The Calendar System In which period was the agenda devised?
In which period was the calendar initially devised?
During what period did the
timetable come into existence?
In what period was the agenda originally created?
During what period was the schedule initially
imagined?
In which period was the timetable firstly established?
In what period did the timetable creation?
In what period was the timetable arise for the first time?
