Reference

Genesis 1:5

And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.
3

And God said, Let there be light: and there was light.

4

And God saw the light, that it was good: and God divided the light from the darkness.

5

And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.

6

And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.

7

And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

First Day of the Week

The verse refers to "the first day" in the context of creation, not as a specific day of a recurring week. There is no mention of a "week" or its cyclical nature within the verse itself.