Heidegger's Bible Handbook: 2 Peter: Time of Writing

5. The opinion of Grotius concerning the time of its writing is refuted. It appears to have been written in 66 AD, or in 67, a little before the death of Saint Peter.

Hugo Grotius

That this Epistle was written after the overthrow of Jerusalem, and so not by the Apostle Peter, as one not outliving that, is rashly asserted by Grotius, relying on this argument, that he speaks of the advent of the Lord, whom no one will have thought to be coming while Jerusalem was yet standing. But Paul also, in 2 Thessalonians 2, speaks of the coming of the Lord. But in such a way that he shows that the Antichrist is going to come first. So also Peter, 2 Peter 3:10, speaks of the coming of the Lord, that His Day is going to come as a thief in the night. But that multiple things are going to precede, especially the judgment of God against Jerusalem, the revelation of Antichrist, etc., although he does not expressly assert, neither does he deny. It is added that we confirmed above that this Epistle was written by the Apostle Peter. But he endured martyrdom before the destruction of Jerusalem, that is, in 67 AD. And, since he, being about to put off the tabernacle of his body, 2 Peter 1:14, wrote this Epistle a little before his death, we have established with probability that it was written around 66 or 67 AD.