This is a lie and complete nonsense and you should be ashamed of yourself for saying it. You should change your name to "Just Baseless Nonsense".
The day of the Lord will come as a thief in the night and "sudden destruction" by fire on the entire earth from which "they shall not escape" will occur on that day. How does what you're saying line up with that? What Peter and Paul described about the day of the Lord has to do with complete global destruction occurring at that time. They do not describe the day of the Lord as being some thousand year period of time at all.
What Peter was talking about in 2 Peter 3:8 relates directly to 2 Peter 3:9. It has to do with the fact that time has no effect on the Lord and the reason He hasn't come back yet is because He doesn't want anyone to perish and is patiently giving people time to repent. It may seem like a long time to us for Him to return, but it's not a long time to Him. That's all 2 Peter 3:8 means. It's not referring to a thousand year time period at all. It's a description of how God looks at time. He created the realm of time and space and exists outside of it, so of course a day is no different than a thousand years to Him. A day is no different than a million years to Him.
Jesus, Paul and Peter all taught the same thing, which is that all unbelievers will be destroyed when Jesus returns.
Matthew 24:37 But as the days of Noah were, so shall also the coming of the Son of man be. 38 For as in the days that were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noe entered into the ark, 39 And knew not until the flood came, and took them all away; so shall also the coming of the Son of man be.
2 Peter 3:3 Knowing this first, that there shall come in the last days scoffers, walking after their own lusts, 4 And saying, Where is the promise of his coming? for since the fathers fell asleep, all things continue as they were from the beginning of the creation. 5 For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:
6 Whereby the world that then was, being overflowed with water, perished: 7 But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men. 8 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. 9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. 10 But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up. 11 Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness,12 Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat? 13 Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness.
1 Thess 5:1 But of the times and the seasons, brethren, ye have no need that I write unto you. 2 For yourselves know perfectly that the day of the Lord so cometh as a thief in the night. 3 For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.
2 Thess 1:7 And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels, 8 In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ: 9 Who shall be punished with everlasting destruction from the presence of the Lord, and from the glory of his power; 10 When he shall come to be glorified in his saints, and to be admired in all them that believe (because our testimony among you was believed) in that day.
These passages couldn't be more clear that no unbeliever will survive the day of Christ's return. What mortals does that leave to populate the earth for a thousand years after that? Believers will all be changed and have immortality at that point (1 Cor 15:50-54). Peter said that according to the promise of Christ's second coming we're looking forward to the new heavens and new earth, not a temporal earthly kingdom (2 Peter 3:13).
unto this day. 9 And David saith, Let their table be made a snare, and a trap, and a stumblingblock, and a recompence unto them: 10 Let their eyes be darkened, that they may not see, and bow down their back alway. 11 I say then, Have they stumbled that they should fall? God forbid: but rather through their fall salvation is come unto the Gentiles, for to provoke them to jealousy. 12 Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness? 13 For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office: 14 If by any means I may provoke to emulation them which are my flesh, and might save some of them.
