In reading this thread
I cam upon this comment by** APB**
The whole world now operates on the 7 day week (AFAIK), even though some Islamic countries and possibly others have different numbering of their years. My question is - how common was the seven day week among the various ancient cultures? Did the Egyptians, Greeks,ancient Chinese, native Americans, Incas, all have the concept of a “week”? What was the length of their weeks?
I am assuming that the dominance of the seven day week is due to the influence of the Judeo-Christian-Islamic tradtion. Any other ideas on that?