The honored Qur'an clearly speaks of an Hour of Judgement: "And (Jesus) shall be a Sign (for the coming of) the Hour (of Judgement); therefore have no doubt about the (Hour), but follow ye Me: this is a Straight Way." Sura 43.61 Az-Zukhruf.
In Mohammed's dat the message was... "The Hour (of Judgement) is nigh..." Sura 54.1 Al-Qamar
"They ask thee about the Hour,-When will be its appointed time? Wherein art thou (concerned) with the declaration thereof? Sura 79.42-43 An-Naziat
The Qur'an does not reveal that answer...but to the Prophets of old was that answer given. Specifically to the prophet Daniel and to Isa al-Masih ibn Maryam, (Jesus the Messiah the son of Mary).