But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.
( 2 Peter 3:8 )
On earth 1 day is equal to 1,000 years at the distance of the firmament, but at the firmament 1 day is equal to 1,000 years on earth. It’s a paradox. It is also mathematically perfect in 2 Peter 3:8.