Sorry, a quick clarification in case I didn’t state my case clearly enough earlier:
“his clearly implies a seven day cycle(known to us as a week).”
Yes, I agree there is an implication there. But what I was trying to get at is, the bible usually is very clear on what it considers important, often repeating the point several times in several different ways. Vague implication is not its usual style, hence the room for questioning.