9 Dhu al-Hijjah 1480 AH From sunset on Thursday, May 30 to sunset on Friday, May 31, 2058. The Hajj's summit: pilgrims stand on the plain of Arafat from noon to sunset; others fast. The Day of Arafah (Arabic: يوم عرفة, romanized: Yawm ʿArafah) is an Islamic holiday that falls on the ninth day of Dhu al-Hijjah of the lunar Islamic calendar. It is the second day of the Hajj pilgrimage and is followed by the holiday of Eid al-Adha. At dawn of this day, Muslim pilgrims make their way from Mina to a nearby hillside and plain called Mount Arafat and the Plain of Arafat in Saudi Arabia. It was from this site that the Islamic prophet Muhammad gave one of his last sermons in the last year of his life. Some Muslims hold that part of the Quranic verse announcing that the religion of Islam had been perfected was revealed on this day. Wiki link Dates: Saudi Arabia's Umm al-Qura calendar (via hijridate, MIT). Local moon sighting can put a day a day later. Text: Wikipedia (CC BY-SA).