Obviously our Heavenly Father knew some of his children would not believe what is written. He even had Peter address this ignorance in IIPeter 3, the whole chapter. Peter tells us that "one day is with the LORD as a thousand years, and a thousand years as one day".
Peter is specific about the subject matter cause in verse 4 he says "from the beginning of the creation".
"Obviously our Heavenly Father knew some of his children would not believe what is written"
Yeah, but God didn't tell you to believe what is NOT written. The 7 24 hr days, the 6000 years, the hydraulic sorting-not in God's Word.