2017年04月 / The History of Calendars and How They Evolved Calendar
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2017年04月14日(金)
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In what period was the timetable invented?
When did the timetable initially developed?
At what time was the calendar come into existence?
In what period did the calendar firstly created?
In which period was the calendar initially thought up?
When did the timetable firstly created?
In what period did the agenda inception?
At what time was the calendar come about for the first time?