Genesis 1:6-8 (NLT)
6 Then God said, “Let there be a space between the waters, to separate the waters of the heavens from the waters of the earth.”7 And that is what happened. God made this space to separate the waters of the earth from the waters of the heavens. 8 God called the space “sky.” And evening passed and morning came, marking the second day.
TIME OF DAY:
This is my obvious “water below” & “water above” interpretation, & should be viewed as rather tongue in cheek! The interpretation of what this scripture might mean could be that God created the sky, by separating water below (the lakes, seas, oceans) from the water above (atmospheric moisture.)
To quote the Bible Knowledge Commentary: ‘On the second day God separated the atmospheric waters from the terrestrial waters by an arching expanse, the sky. This suggests that previously there had been a dense moisture enshrouding the earth. God’s work involves making divisions and distinctions.’
An interesting comment from J. Vernon McGee’s Thru the Bible (Commentary): ‘ “God called the firmament Heaven.” This is not heaven as you and I think of it. Actually, there are three heavens that are mentioned in Scripture. The Lord Jesus spoke of the birds of heaven, and I think that is the heaven mentioned in this verse. Then there are the stars of heaven, meaning the second heaven, and there is the third heaven where God dwells. So the first layer up there, the first deck, is the deck where the clouds are and where the birds fly.’
So there you have it, there are 3 heavens, & the one mentioned in this verse is called the sky!