How Long Was Prehistory? Five Days

History begins on day 6, when Adam and at the end also Eve are present as human observers.

How do we best approach pre-history?

Reconstruction? Or prophecy?

Reconstruction appeals to presuppositions about the past, and in the case of pre-history, about a past observed by no man.

Prophecy appeals to God being present and knowing what He was doing. So, in an extended sense, that prophecy Moses had on Sinai about the six days' work is also history.

Here's Kennedy Hall:

As an aside, the idea that there is a “pre-history” is, to me, a bit nonsensical. As if there were a history before there were a history.

This is the one real quibble I had with an otherwise good article. Yes, there are five days of history recorded by God and angels and revealed later to man, before there is a history where man is present as an observer. Apart from this quibble, take a read:

Crisis Magazine : Confessions of a Creationist
Kennedy Hall, December 2, 2022
https://www.crisismagazine.com/opinion/confessions-of-a-creationist

Enjoy!/HGL