But, beloved, do not forget this one thing, that with the Lord one day is as a thousand years, and a thousand years as one day.  (9) The Lord is not slack concerning His promise, as some count slackness, But is long suffering toward us, 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 which the heavens will pass away with a great noise, and the elements will melt with fevent heat; both the earth and the works that are in it will be burned up.  (11) Therefore, since all these things will be dissolved, what manner of persons ought you to be in holy conduct and godliness, (12) looking for and hastening the coming of the day of God, because of which the heavens will be dissolved, being on fire, and the elements will melt with fervent heat?  (13) Nevertheless we, according to His promise, look for new heavens and a new earth in which righteousness dwells.  (14) Therefore, beloved, looking forward to these things, be diligent to be found by Him in peace, without spot and blameless;

Our verses written by the apostle Peter are addressed to the faithful. He is discussing the second coming of Christ Jesus when the destruction of the world will happen and all will be judged. Peter is not providing a chronology of end times but is collapsing the events of the future.  His focus is to warn us to be right with God – only through faith in Jesus – and now to be certain of the future where there will be new heavens and a new earth where God has promised to restore creation as it was meant to be.  The end will come like a thief in the night as Jesus said and we are to be holy (separate from this world) and ready.

Peter tells us the reason for the delay is that God is giving time for all mankind to come to repentance.  God has hidden the end time.  The faithful are advised to be patient but also to be watchful; to be confident in the promise of God who never disappoints.  In patience and expectation of this sure end, if we are right with God we will live our time here in peace and joy.