The third and final woe occurs when the seventh gospel trumpet of judgment is sounded.
“Then the seventh angel blew his trumpet, and there were loud voices in heaven, saying, ‘The kingdom of the world has become the kingdom of our Lord and of his Christ, and he shall reign forever and ever!’”
It is the announcement that the finale, resulting in the return of Christ to earth. At this point, the sun will darken, the stars will fall from heaven and the heavens will be shaken as all of the planet’s population will see the sign of His coming. The dead are raised, and the living become immortal, and the world will become the “kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.” It signifies the completion of the mystery of God and the fulfillment of the prophecy given to the disciples.
The third woe is essentially the seven bowls of God’s wrath. It creates a series of judgments and horrors upon the population of the Earth and marks the finishing of God’s judgment of sin. It consumes the entire world. It also results in the destruction of all hostile armies and the Beast as Christ returns. The revelation also describes the judgment of cities. At this point, at the seventh trumpet and the third woe, theologians who study Revelation agree that it will be a point of no return and there will be no more chances to repent after the 7-year period leading up to the Last Judgment which had signs of the Last Coming of Christ.