2017年04月 / Mesoamerican calendars Wikipedia
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Calendar Reforms Months Years
2017年04月14日(金)
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When did the timetable devised?
In which period did the timetable first introduced?
In what period did the schedule arise?
At what time did the timetable firstly invented?
In which period did the timetable firstly imagined?
During what period did the calendar initially established?
At what time did the agenda generation?
In what period was the calendar arise for the first time?