Nobody knows. There is a hadith which gives the 50 signs of the Judgement day, not ulike the signs given in the Book of Apocalypse. Like Christians, Muslims believe that the present life is only a trial preparation for the next realm of existence. This life is a test for each individual for the life after death. A day will come when the whole universe will be destroyed and the dead will be resurrected for judgment by God. This day will be the beginning of a life that will never end. This day is the Day of Judgment. On that day, all people will be rewarded by God according to their beliefs and deeds. Those who die while believing that "There is no true god but God, and Muhammad is the Messenger (Prophet) of God" and are Muslim will be rewarded on that day and will be admitted to Paradise fo