It's quite possible the creation narrative was "formatted" as a shadow or motif to reflect the six day/sabbath command given to Israel as a part of the prophetic narrative that proceeds onward to the consummation in Christ.
(Col 2:16 Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days)
(Col 2:17 Which are a shadow of things to come; but the body is of Christ.)