The Quran is the final revealed book of God. It was revealed to the last prophet, Muhammad in the first quarter of the 7th century. The basic theme of the Quran is to warn man of God’s creation plan, according to which the present world has been built for a limited period. A time will come when this world will be brought to an end, then Qiyamah (Doomsday) will occur. The study of the Quran (and prophetic traditions) tell us that before the coming of Doomsday, certain signs will be revealed. After the emergence of these signs, God will command the angel Israfil to blow the trumpet. Then, suddenly, human history, having passed through its temporary phase, will enter its permanent phase. That is to say, the blowing of the trumpet will mark the end of the phase of action and the beginning of the phase of reward. All of these signs have already been fulfilled. The time is soon coming when Doomsday appears and all human beings will be resurrected to be presented before their Creator on the Day of Judgement. Then, according to the record of their deeds on Earth, their final fate will be decided upon.

Source: The Alarm of Doomsday