/r/askhistorians
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why, in the entirety of both the Islamic and Christian world, do we have a 7 day week? is there an astronomical or other historical significance to a 7 day time period? Are any European or Middle Eastern cultures in history known to have had a concept of a week of any other length than 7 days?
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How well known where Socrates, Plato and Aristotle at their time, and how much did the Greek population care about philosophy?
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