【More・・・】
Counting down to Christmas A history of the Advent CalendarAt what time was the timetable devised?
At what time did the calendar initially devised?
In which period was the agenda arise?
In what period was the calendar initially created?
During what period was the timetable initially envisioned?
When was the schedule firstly devised?
At what time was the agenda creation?
In which period did the calendar come about for the first time?