Another interesting theory, lots of speculation, but not really supported directly from the Bible.
You can not find a "day is as a thousand years" in the bible ?
shalom b'SHEM Yah'shua HaMashiach Adonai
Hah. That's funny. I wish I had a nickel for every time that verse has been abused by a futurist. And it shows how little folks who quote it know their Old Testament.
For a thousand years in Your sight Are like yesterday when it is past, And like a watch in the night. (Psalm 90:4)
There is absolutely no evidence that phrase is intended by God to demonstrate where we are in creation history. Peter was simply taking his readers back to Psalms. Our days here are nothing in the light of all eternity.
But if that is the sum total of what you are basing your theory on, you are welcome to it.