A lot of the book of Revelation (until about Chapter 20) was fulfilled in the destruction of Jerusalem in 70 AD.
The problem with this junk bible claim is that John is taken in spirit to the Lord's day ... That day does not happen until Christ returns for a harvest. Revelation 12 covers the world (age) that was. (For those Biblically literate that is Peter's description. IIPeter 3) And Revelation 12 is one of the many places where the fake Jesus is named, he gets tossed out of heaven down to this earth.
John does NOT even mention 70 AD and that tin horn dictator... cray cray and serpent bait, just like Paul warned.
The book is commonly dated to have been written after AD 70 by John of Patmos. Ancient scholars argued over whether that John was also the Apostle John.