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Who Invented The Calendar of 365 Days The History of CalendarWhen did the calendar created?
At what time did the agenda first
introduced?
In which period did the timetable come into existence?
During what period did the agenda originally created?
During what period was the timetable firstly conceived?
During what period was the timetable firstly devised?
During what period did the schedule inception?
When was the calendar arise for the first time?