I did a Google search, on the words (not phrase)
theories on Genesis 1 days. I don't have time, or inclination, to go through the roughly 3,000,000 web pages that Google says it can find for me. However, I was interested in the first few that came up. (I'm not giving the URLs. One reason is that I'm not sure these pages are authoritative exponents of a particular position. If you want to see these pages, you can do a Google search yourself!)
I found that there was a diversity of views on the meaning of the word "day" in Genesis 1, just among the first ten hits.
Here are some such views:
1) The six, or seven, days of creation were literal days, approximately 24 hours in length.
2) The days refer to long periods of time (ages).
3) There was a gap in God's creative activity, between day 1 and day 2.
4) The days were days of revelation. God revealed different truths on different days.
All of these views have problems, as do any other views of the time frame of Genesis 1.
I indicated some of the problems with the first view in a
previous post. Some of my readers were kind enough to comment. I may be missing something, but I remain convinced that Genesis 2:5 seems to be scriptural evidence against taking Genesis 1 as speaking of literal days. There are other scriptural reasons for questioning this view. (See
this post, and the comments)
Although belief in literal days does not require belief in a young earth, at most thousands of years old, I'm not aware of anyone who believes that these days took place, say, several million years ago. The scientific evidence, what we can learn about nature from observation, is part of God's revelation, according to Psalm 19, Romans 1, and Colossians 2. Although there have been questions about the evidence, the vast majority of scientists believe that the earth is much older than thousands of years.
The second view may be correct, but it is not possible to merely say that the days were long consecutive periods of time, and that making them so yields a scheme consistent with paleontological evidence. Birds appear before reptiles, in the Genesis account, and most paleontologists are convinced that birds descended from reptiles. Water animals, apparently including seals and whales and their relatives, appear before land animals, in Genesis 1. They are believed to have descended from land animals.
As to the third and fourth options, there is little scriptural evidence for them. One of them may be correct, and they both have some appeal.
I received a comment on the previous post, indicating that the commenter, a serious theologian, intends to post more about Genesis 2:5. He hasn't yet, but I await his contribution with interest.
Thanks for reading.