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The History of the Advent Calendar I Oxford Open LearningIn what period was the calendar devised?
At what time was the agenda initially introduced?
In which period was the timetable arise?
In what period was the agenda originally devised?
In which period did the timetable firstly imagined?
During what period did the calendar initially established?
In which period did the timetable creation?
During what period was the schedule emerge for the first time?