Genesis 1:3 (NASB1995)

Then God said, “Let there be light”; and there was light. 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.

God Made the World
Illustration from the book 'Bible Primer: Old Testament' by Adolf Hult, 1919