On which date of Dhu'l-Hijja does Eid al-Adha end?

Eid al-Adha ends on 13 Dhu'l-Hijja, the final day of the festival’s traditional four-day period.

The celebration begins on 10 Dhu'l-Hijja, immediately after the Day of Arafah on the ninth. The following days are known as the days of Tashreeq and remain part of the festival. This places Eid al-Adha within the climactic portion of Hajj, the pilgrimage to Mecca that takes place in the same lunar month.

The date is sometimes confused with 9 Dhu'l-Hijja, but that is the Day of Arafah, one of the most important days of Hajj and the day before Eid. The eighth, known as the Day of Tarwiyah, marks an earlier stage of the pilgrimage.

There is a related legal distinction concerning the sacrifice itself: some Islamic schools allow udhiyah until sunset on the 12th, while others extend the period to the 13th. That difference does not change the standard festival span, which ends on 13 Dhu'l-Hijja.