Genesis 1:5
God called the light “day,” and the darkness He called “night.”
What it says
God names the light day and the darkness night, defining the rhythm of the first day.
What it is doing
This verse completes the first day's ordering by giving names to the divided realms.
In context
3And God said, “Let there be light,” and there was light. 4And God saw that the light was good, and He separated the light from the darkness. 5God called the light “day,” and the darkness He called “night.”