Jesus IS THE LIGHT OF GENESIS, BEFORE THE CALLING OF THE SUN ON THE FOURTH DAY TO MARK DAY AND NIGHT. John 1:5
Genesis 1:3-5 LITV
(3) then God said, Let light be! And there was light.
(4) And God saw the light, that it was good, and God separated between the light and darkness.
(5) And God called the light, Day. And He called the darkness, Night. And there was evening, and there was morning the first day.