Then God is deceiving us, because He told us He took six days, and not six billion, years. Plus seven billion more.
You can take 'six days' figuratively, or poetically, or rhetorically. I have no issue with people who do, with one exception. When I suggest that the universe appears to be over 13 billion years old, but 'six days' is the reality, they think my view has me making God deceptive---and that's ONLY true, if everything's actually over 13 billion years old. If the age of the universe's closer to 'six days' old, than to 13 billion years old, then there's no deception at all on God's part....