Genesis 1:4-8

God saw that the light was good; and God separated the light from the darkness.

God called the light “day,” and the darkness He called “night.” And there was evening and there was morning, one day.

Then God said, “Let there be an expanse in the midst of the waters, and let it separate the waters from the waters.”

God made the expanse, and separated the waters that were below the expanse from the waters that were above the expanse; and it was so.

God called the expanse “heaven.” And there was evening and there was morning, a second day.