Counting down to Christmas A history of the Advent Calendar
When was the timetable invented?
When did the timetable initially introduced?
At what time was the schedule come into existence?
In what period did the timetable initially devised?
In which period did the schedule initially conceived?
During what period was the calendar firstly established?
In which period did the calendar creation?
In which period did the calendar arise for the first time?
