In what period did the agenda devised?
At what time was the timetable first introduced?
At what time was the timetable emerge?
At what time was the schedule initially devised?
In which period was the calendar firstly conceived?
During what period was the schedule firstly devised?
During what period was the timetable creation?
When was the calendar come about
for the first time?
The History of the Advent Calendar I Oxford Open Learning
