The Bible is Authoritative

Genesis 1:1 "In the beginning God created the heavens and the earth."
Psalm 104 Likewise a creation narrative, though poetic in nature. But it does not focus on the "days".
Romans 1:20 "For the invisible things of him since the creation of the world are clearly seen, being perceived through the things that are made, even his everlasting power and divinity; that they may be without excuse: "