Eid al-Adha in 2016 is on Sunday, the 11th of September.Based on sightability in. , in 2016 Eid al-Adha will start in North America a day later-on Monday, the 12th of September.Note that in the Muslim calander, a holiday begins on the sunset of the previous day, so observing Muslims will celebrate Eid al-Adha on the sunset of Saturday, the 10th of September.id al-Adha in 2016 is on Sunday, the 11th of September. Based on sightability in. , in 2016 Eid al-Adha will start in North America a day later-on Monday, the 12th of September.