Originally Posted by edlib
So each "day" as described could be years (perhaps millions or billions) long.
Indeed it could. However even if we were to resolve this one issue, it still would not match what modern cosmology tells us about the formation of the universe.
To your point, why would it take an omnipotent being 6 million/billion years to create a universe? He/she/it is capable of kicking off the big bang with a thought, yet we need multiple generations of stars/novae in order to form heavy elements? What do we win by successfully shoe-horning actual science into a 2000 year (or more ala OT) old series of stories?