Creation Moment 1/28/2023 - What Constituted "a Day" at the Creation?

"The second verse of the Bible tells us that darkness was upon the face of the deep, that is, upon the chaotic mass which had been spoken into existence. 

The next act of creation is recorded in the third verse:
Genesis 1
3 And God said, Let there be light; and there was light.
This constituted the first day’s work. 

The evening, the darkness, and the morning, the light, were the first day. 

Here it is seen that in the first day the dark preceded the light part, and consequently the same order must necessarily follow in all
succeeding days. The record of creation is alone sufficient to
show that the day begins with the evening." E.G. Waggoner