What happens on the Day of Judgement, according to Islam?

As a Muslim one should firmly believe in the truth about the events of death, questioning in the grave, resurrection, the Assembly, the Reckoning, the Bridge over Hell, the Scale, Jannah, Hell and the other events regarding the Day of Judgement. It was narrated that the Beloved Prophet ﷺ used to seek refuge with Allah from the torment of the grave and the trial of the Dajjal, and he said: "You will be tested in your graves." [Sunan an-Nasa'i 2065]

This world will come to an end by the first blow of the Trumpet, as mentioned in the Qur'an: "And the Trumpet will be blown, then all those who are in the heavens and on earth will be shocked to death except those whom Allah exempts. Then it will be blown for the second time, and behold; they will be standing, witnessing the horrors of that Day. Then the earth will shine with the light of its Rubb, the records will be laid open, the Prophets and the witnesses will be brought, and humankind will be judged fairly, and they will not be wronged." [Qur'an, az-Zumar 39:68-70]

Men will emerge from their graves bewildered, naked, uncircumcised and barefoot. The Day of Reckoning would be fifty thousand years long. The Beloved Prophet Muhammad ﷺ would intercede with Allah on behalf of mankind.

Allah will then begin taking accounts of the deeds. Those who will receive their records in their right hand would be prosperous, and those who would receive their records in their left hand or from behind their back will be doomed.

The Ummah of the Beloved Prophet ﷺ will attend the great pool which Allah has granted him, Hawdh e Kauthar, on the Day of Resurrection.

The Scale will be set on the Day of Resurrection for weighing deeds. It is a real Scale with two actual sides, in fulfillment of Divine justice. The one whose good deeds will outweigh his bad deeds will prosper and go to Jannah, and the one whose bad deeds would outweigh his good deeds will be sent to Hell-Fire.

"And the weighing on that Day will be real. So, those whose good deeds are heavy in the scale will prosper. While whose good deeds are light, it is they who will have ruined themselves because they denied Our signs." [Qur'an, al-A'raf 7:8-9]

Allah has different levels in Jannah, each according to the believer's rank, Iman and piety. Then, there is Hell, which will be the abode of the sinful and the ones who denied Allah and His Messengers.

"And what do you know what Hell is? It spares nothing; it leaves nothing intact; it scorches (even) the skin." [Qur'an, al-Muddaththir 74:27-29]