Genesis is literal. There is no poetry like Revelation. A day is a day. If your human intellect must try to comprehend the math, then realize that sin broke the world and reshaped everything. What was the speed of light before sin corrupted existence? You can not look back at time and apply today’s knowledge like our reality has always been relevant. Before sin entered the world, we have no way of comprehending what that may have been like.
“Genesis is literal.”
Says who?
I don't disagree.
If I understand Gerald Schroeder correctly what he is pointing out is time is relative to perspective and from our perspective the Biblical timing of creation in 6 days is consistent with our measurements equaling 15 billion years for the existence of the universe.
Per Torah, a day starts at sunset. With no sun, the first day had no start.
Genesis is 'literal' but does not give the complete story. There is no date given when Genesis 1:1 began. Then in Genesis 1:2 we are told about the 'overthrow - casting down' of the rebel devil.
Sometime between Genesis 1:1 and 1:2 is when that 'tree of the knowledge of good and evil' took root. So there was 'sin' even before the formation of the Adam in a flesh body.
Peter says that one day is as a thousand years with the LORD and a thousand years is as a day. Peter also says that according to the holy prophets there are three different heaven/earth worlds (ages) The first heaven/earth age was destroyed by a flood, and that is exactly what Genesis 1:2 states as well.
Solomon in Ecclesiastes 1:9 The thing that hath been it is that which shall be; and that which is done is that which shall be done: and there is no new thing under the sun.
<10 Is there any thing whereof it may be said 'See, this is new?' it hath been already of old time, which was before us.
11 There is no remembrance of former things, neither shall there be any remembrance of things that are to come with those that shall come after.
Genesis 5:27 And all the days of Methuselah were nine hundred sixty and nine years: and he died.
No flesh being lived in a flesh body a full 'day' with the LORD. Then in Genesis 6 because of what the flesh beings participated in and with, their life span was cut to max 120 years.
The 'days' of creation are the LORD's work and while there is no doubt He could have performed His work in a 24 hour day, that is not what HE instructed His elect to pen.
We are not told when the soul/spirit intellect was created, just as we are not told the date when the first rebel rebelled, but it was before Genesis 1:2.
Genesis is literal.
In the beginning the earth was void and with out form, God did not create the earth in six days because it was already here before the first day.
The Genesis you refer to was the work of English writers.
They knew how to write. But the translation is several times removed from anything original.