Weeks mostly have to do with the market cycle, which has been anywhere from 4 to ten days depending on the local economy. The Chinese in particular used 5 or 10

Weeks mostly have to do with the market cycle, which has been anywhere from 4 to ten days depending on the local economy. The Chinese in particular used 5 or 10 day weeks for quite some time. That works better for lunation than 7. The seven day standard seems to have worked as a reasonable compromise across a wide variety of ancient economies and plan