2017年04月 / The history of calendars
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The History of Calendars and How They Evolved Calendar
2017年04月14日(金)
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During what period was the agenda created?
In what period did the timetable first established?
At what time did the schedule come into existence?
At what time was the schedule firstly invented?
In which period did the schedule initially envisioned?
When was the calendar firstly introduced?
At what time was the agenda generation?
When was the agenda emerge for the first time?