Eid al-Adha is one of the holiest days on the Muslim calendar. The day marks the end of the hajj pilgrimage to Mecca. It's the feast of the sacrifice, when any Muslim who is able should sacrifice an animal and donate the meat to the poor.
There is little to celebrate in Syria's largest city, Aleppo, however. A cease-fire called for the holiday is already crumbling, and in some areas it never took hold.