Hi, Al! welcome aboard!
In summary, the important point about these topics that I have addressed here is that the timeframe and calendar of God is virtual proof that there is a God and he created the Earth and all that is in it. Otherwise, how would early mortal Hebrew authors of Genesis and other books of the Bible write what they were given in forms that do not appear to fit the Earths timeframe or calendar?
Maybe they had no clue what the actual timeframe of early earth was like? The Romans and greeks appear to have been in the same boat....mythology is mythology, after all.
"The wretched world lies now under the tyranny of foolishness; things are believed by Christians of such absurdity as no one ever could aforetime induce the heathen to believe." - Agobard of Lyons,
ca. 830 AD