2017年04月 / The Mesoamerican Calendar article
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Counting down to Christmas A history of the Advent Calendar
2017年04月14日(金)
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At what time did the schedule devised?
During what period was the calendar initially developed?
At what time did the agenda come into existence?
In which period was the agenda firstly invented?
In which period did the agenda initially envisioned?
During what period was the schedule initially created?
In which period was the timetable creation?
When did the timetable arise for the first time?