Fourth. Each of all six days of formation week, then, may very well have ranged in length. They could perhaps each have lasted only for twenty-four seconds or shorter.
Or they could each have lasted twenty-four hours — or even longer. Or the length of each may have differed from the rest.
Fifth. The seventh day of formation week — the day without a terminating evening and morning — lasted for at least four thousand years.27 Indeed, it is probably co-extensive with the total period of the history of man himself (cf. n. 23 above). Whereas all the first few days of the formation week collectively, on the other hand, are themselves all together called “the day that the Lord God made the Earth and the Heavens” in Genesis 2:4 itself.