The time of coming to 'Arafat and leaving from it

Question :

When does the Hajj pilgrim set out to 'Arafat and when does he leave from it?

Answer:

It is legislated to go to it after sunrise on the day of 'Arafah, which is the 9th day (of Thul-Hijjah). The Hajj pilgrim prays the Zuhr and 'Asr prayers combined and shortened in the early time (i.e., the time of Az-Zuhr) with one Athan and two Iqamaks, in following the Prophet and his Companions . He stays in it (the area of 'Arafat) until sunset, while busying himself with the remembrance of Allâh, supplications, recitation of the Qur'an and saying the Talbiyyah until the sun disappears. It is legislated to say often: "La ilaha illallahu wahdahu la sharika lahu, lahul-mulku wa lahul-hamdu, wa Huwa 'ala kulli shay'in Qadeer. Subhanallâhi, wal-hamdu lillâhi, wa la ilaha illallahu, wa la hawla wa la quwwata illa billah" (There is none worthy of being worshiped but Allâh alone, Who has no partner. To Him belongs the sovereignty and to Him belongs all praise, and He has power over all things. Allâh is free from all imperfections, all praise is due to Allâh, and there is none worthy of being worshiped but Allâh. And there is no power or might except with Allâh). He raises his hands while supplicating and he praises Allâh and sends prayers of blessing upon the Prophet before supplicating. He faces the direction of the Qiblah and all of 'Arafat is a place of standing. Then, when the sun disappears, it is legislated for the Hajj pilgrims to leave to Muzdalifah with calmness and dignity saying the Talbiyyah in abundance. Then, when they reach Muzdalifah, they offer the Maghrib and 'Isha' prayers (combined) with one Athan and two Iqamahs, making the Maghrib prayer three Rak'ahs and the 'Isha' prayer two Rak'ahs.

Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 4 Page 213