Public and school holiday dates for parents' diaries for Eid Al Adha and the rest of 2021 1 of 10 Arafat Day is an Islamic holiday that falls on the 9th day of Dhu al-Hijjah of the lunar Islamic Calendar and marks the second day of Haj, or the pilgrimage. Eid Al Adha is observed on the next day, and marks the end of the pilgrimage. The exact dates of Islamic holidays are determined according to moon sighting. Image Credit: Twitter/ UAE Barq 2 of 10 A leading astronomer based in Sharjah, Ebrahim Al Jarwan, member of the Arab Union for Astronomy and Space Sciences and head of Sharjah Planetarium, told Gulf News that Arafat Day, the 9th day of Dhu Al Hijja, would fall on July 19 while Eid Al Adha will fall on July 20.