At what time was the
schedule originated?
When did the timetable first established?
During what period was the schedule come into existence?
During what period was the calendar originally devised?
During what period was the timetable initially conceived?
In which period was
the agenda firstly established?
In what period was the timetable inception?
When did the schedule arise for the first time?
History of calendars Wikipedia
At what time was the
schedule originated?
When did the timetable first established?
During what period was the schedule come into existence?
During what period was the calendar originally devised?
During what period was the timetable initially conceived?
In which period was
the agenda firstly established?
In what period was the timetable inception?
When did the schedule arise for the first time?
The History of Calendars and How They Evolved Calendar
