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.
All Commentaries on 2 Peter 3:8 Go To 2 Peter 3
Irenaeus of Lyons
AD 202
And there are some, again, who relegate the death of Adam to the thousandth year; for since "a day of the Lord is as a thousand years".
This is an account of the things formerly created, as also it is a prophecy of what is to come. For the day of the Lord is as a thousand years;