Okay, only God knows when the world will end. I don't believe the end of the world will be in 12/21/12, but if the end of the world ever does come at a different time, this is what I think will happen.
The Last Judgement will take place at the end of the world, at the second coming of Christ. "All who are in the tombs will hear his voice and come forth, those who have done good, to the resurrection of life, and those who have done evil, to the resurrection of judgement."
At the end of time, God will create a new heaven and a new earth. Evil will no longer have any power or attractiveness. The redeemed will stand face to face with God- as his friends. Their yearning for peace and justice will be fulfilled. To behold God will be their blessedness. God will dwell among them and wipe every tear from their eyes; there will be no more death, sorrow, lamentation, or trouble.
information from my book, called YOUCAT