In what period did the schedule invented?
During what period did the timetable initially devised?
At what time did the agenda arise?
When was the timetable originally created?
In which period did the timetable initially conceived?
In what period was the schedule firstly created?
During what period was the calendar generation?
In which period did the schedule arise for the first time?
The History of Calendars and How They Evolved Calendar
In what period did the schedule invented?
During what period did the timetable initially devised?
At what time did the agenda arise?
When was the timetable originally created?
In which period did the timetable initially conceived?
In what period was the schedule firstly created?
During what period was the calendar generation?
In which period did the schedule arise for the first time?
Julian calendar Wikipedia
