the fascinating examples of “Last days” in the bible
Acts 2
14 [e]Then Peter stood up with the Eleven, raised his voice, and proclaimed to them, “You who are Jews, indeed all of you staying in Jerusalem. Let this be known to you, and listen to my words. 15 These people are not drunk, as you suppose, for it is only nine o’clock in the morning. 16 No, this is what was spoken through the prophet Joel:
17 ‘It will come to pass in the last days,’ God says,
‘that I will pour out a portion of my spirit
upon all flesh.
Your sons and your daughters shall prophesy,
your young men shall see visions,
your old men shall dream dreams.
...
22 You who are Israelites, hear these words. Jesus the Nazorean was a man commended to you by God with mighty deeds, wonders, and signs, which God worked through him in your midst, as you yourselves know. 23 This man, delivered up by the set plan and foreknowledge of God, you killed, using lawless men to crucify him. 24 But God raised him up, releasing him from the throes of death, because it was impossible for him to be held by it.
2 Timothy - Paul charges that there will be terrifying times in the coming last days, NOT 2000 years in the future
So Paul was clear that he was living in the last days
2 Peter 3 - he was clear that these are the last days
And this is as in Matthew 24 where the destruction of Jerusalem IS the end of the age, i.e the last days
So, to whom was Peter speaking in your quoted text of Acts?