Eid-ul-Adha is a celebration which takes place on the 10th of zilhaj. It marks the end of the hajj pilgrimage and the beginning of the ritual of Qurbani. Eid-ul-Adha is one of the most important Islamic holidays of the year. Eid-ul-Adha marks the end of Hajj, the sacred pilgrimage to the holy city of Mecca. The hajj to Mecca is a once-in-a-lifetime obligation upon male and female adults whose health and means permit it and In the words of the Quran, upon "those who can make their way there."
This Eid is all about remembering the story of the prophet Ibrahim. So the history of Eid-ul-Adha can be traced back to the story which states that Ibrahim was instructed by Allah, in a dream, to raise the foundations of Kaaba, the most sacred shrine in Mecca. Muslims believe that even after undergoing a lot of trials and tribulations on his way to Mecca, God revealed in a dream to Ibrahim to Qurbani of his son Ismail. Ibrahim and Ismail set off to Mina for the Qurbani. As they went, the devil attempted to lead Ibrahim astray by disobeying God and not to sacrifice his beloved son But Ibrahim remained unaltered in his decision and true to God and drove the devil away. As Ibrahim prepared to kill his son, God stopped him and gave him a sheep to Qurbani instead. Popularly known as the Festival of Sacrifice, this Muslim holiday Eid-ul-Adha commemorates Prophet Ibrahim’s unselfish act of sacrificing(Qurbani) his son to the One God, Allah.
The festival reminds everyone of the mercy and benefits bestowed upon mankind by Allah. So the obedience of Ibrahim Muslims performed Qurbani the sacrifice of an animal during the last Islamic month of Zilhaj and remember the greatest sacrifice in history during the celebration of Eid ul Adha.