There is a Day that God has blessed and made holy. It is not seven days, but one.
Have you seen it? Do you recognize it? If not, it means you are more than like trampling on holy ground without knowing it. For this day appears every week. It is the seventh day, the Sabbath of the Lord. Genesis 2:1-3; Exodus 20:8-11
God could have allowed creation to end on the sixth day. Nothing else was left to create; He had finished His work.
However, as an artist places his signature on a finished work and a manufacturer places his label on a finished product God places His sign/mark on creation--the Sabbath.
This sign is not a stone, lest man would remove it; it is not a plant or flower, lest people would trample on it; it is not a place, lest men would avoid going there. Gods sign is the Sabbath; forever etched in time, so that as long as time last, the Sabbath would.
Therefore, like the birds, the fish, the plants, the animals, the heavens, the Sabbath is a product of creation. As a matter of fact, it is the memorial of creation (Exodus 20:8-11; Ezekiel 20:12, 20; Exodus 31:18).