What is the Day of Judgment?
Surety Muslims must believe that this Day will occur. As Allah says in the Quran, Surah Al Hud, verse 103: In that is a Sign for those who fear the penalty of the Hereafter: that is a Day for which mankind will be gathered together: that will be a Day of Testimony. Nor shall We delay it but for a term appointed.
Time no one knows when the Day of Judgment will be, not even the Prophet or the Angel Jibreel (Gabriel), as mentioned in a narration in which the Angel asked Muhammad (may Allahs peace and blessings be upon him) when the Hour was, and the Prophet replied: The person being asked has as much knowledge about this as the one asking.
Major sign there are many signs that point to the Day of Judgment, and one of the biggest signs is the rising of the sun in the west. Once this happens, Allah will no longer accept any prayers. For those who disbelieved, they will see for real what they had disbelieved in.