Peter’s reference is to the “Day of the Lord,” I.E. the millennial reign. That was the subject at hand.
This is an important point in scripture; the subject is established in context.
God is the same yesterday, today, forever. If a thousand years is one day to God in the millennium, then it could be in Genesis, and obviously was. The bible proves itself upon study.
Peters reference is to the Day of the Lord, I.E. the millennial reign. That was the subject at hand.