When Noah entered into the ark he entered from the “old earth”. When he came out of the ark, he came out to a “new earth”.
Hence before he entered the ark he was part of the “old creation.” When he entered into the ark he was being transported into the “new creation”.
His journey into the new earth began when he stepped into the ark.
Jesus tells us that the “old Jerusalem” was the “earth”. The temple was the place where God met man. Where “heave and earth” meet.
Then when the temple and Jerusalem were consumed the people who believed Jesus entered into the new “heaven and earth” and the “new Jerusalem”.
Just like Noah, he was transported from the old earth onto the new one when he was in the ark, you were transferred from the old Covenant into the new Covenant when you were in Christ.
Hence Noah became a new creation when he was in the ark. You became a New Creation when you were placed in Christ.
26 “Just as it was in the days of Noah, so also will it be in the days of the Son of Man. 27 People were eating, drinking, marrying and being given in marriage up to the day Noah entered the ark. Then the flood came and destroyed them all.
2 Corinthians 5:17
17 Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!
So the last days which is akin to Noah already came to pass. Live your Christ life to the fullness.