28 July : To mark the Muslim holy festival of Eid al - Fitr ISIL released a video showing graphic scenes of a large scale killing of captives .
Eid al - Fitr ends the period of Ramadan .
28 July : To mark the Muslim holy festival of Eid al - Fitr , which ends the period of Ramadan , ISIL released a video showing graphic scenes of a large scale killing of captives .