That's a fun one too. Time. What is it? Who "invented" it? We did. It was likely one of the first things that compelled the invention of language. Organization starts with coordination and is our most basic unit of measure.
How long does it take? How fast does it go? When to plant? When to sleep? When to meet? When to migrate....you get the point
What need does the universe beyond human existance have for that which we call time? A God certainly does not keep time. Now that you consider the reason we measure and keep time, how long would one of God's day's be?
I surmise it is day #7 at about noon on God's calendar. But who am I to speculate?
Well, and then there’s the entire concept of entropy, proving that the earth is finite - because if it were infinite, everything would necessariy be the exact same temperature (think about it) and no energy production would be possible.
And for the 7 day thing? Quantum Physics (above my pay grade) proves time has sped up greatly, meaning our “concept of time” and 7 Days may not be a contradiction at all. Humans are prisoners of time and space, and even prisoners of the defintiions of time and space, and yet some insist there is no God. How obtuse when you think about it (which they haven’t).