Genesis 1:3-5

1:3 God said, “Let there be light.” And there was light! 1:4 God saw that the light was good, so God separated the light from the darkness. 1:5 God called the light “day” and the darkness “night.” There was evening, and there was morning, marking the first day.

Genesis 1:17-18

1:17 God placed the lights in the expanse of the sky to shine on the earth, 1:18 to preside over the day and the night, and to separate the light from the darkness. God saw that it was good.