2017年04月 / When Was the Calendar Invented A Look at the History and
12345678910111213The Maya Calendar System Smithsonian Institution15161718192021222324252627282930The History of the Calendar Calendar
Calendar Ancient Religious Systems
2017年04月14日(金)
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At what time did the agenda originated?
During what period did the timetable initially devised?
At what time was the calendar arise?
During what period was the timetable firstly devised?
In which period was the agenda initially imagined?
In what period did the timetable initially devised?
In which period did the timetable creation?
When was the schedule emerge for the first time?