Eid-ul-azha also called the "Festival of Sacrifice", is the second of two Islamic holidays celebrated worldwide each year (the other being Eid al-Fitr), and considered the holier of the two. It honors the willingness of Ibrahim (Abraham) to sacrifice his son as an act of obedience to God’s command. But, before Ibraham could sacrifice his son, God provided a lamb to sacrifice instead. In commemoration of this, an animal is sacrificed and divided into three parts: one third of the share is given to the poor and needy; another third is given to relatives, friends and neighbors; and the remaining third is retained by the family.
In the Islamic lunar calendar, Eid al-Adha falls on the 10th day of Dhu al-Hijjah. In the international (Gregorian) calendar, the dates vary from year to year drifting approximately 11 days earlier each year.
Devotees offer the Eid ul-Azha prayers at the mosque. The Eid al-Adha prayer is performed any time after the sun completely rises up to just before the entering of Zuhr time, on the 10th of Dhu al-Hijjah. In the event of a force majeure (e.g. natural disaster), the prayer may be delayed to the 11th of Dhu al-Hijjah and then to the 12th of Dhu al-Hijjah.
Eid prayers must be offered in congregation. Participation of women in the prayer congregation varies from community to community. It consists of two rakats (units) with seven takbirs in the first Raka'ah and five Takbirs in the second Raka'ah. For Sunni Muslims, Salat al-Eid differs from the five daily canonical prayers in that no adhan (call to prayer) or iqama (call) is pronounced for the two Eid prayers.The salat (prayer) is then followed by the khutbah, or sermon, by the Imam.
At the conclusion of the prayers and sermon, Muslims embrace and exchange greetings with one another (Eid Mubarak), give gifts and visit one another. Many Muslims also take this opportunity to invite their non-Muslim friends, neighbours, co-workers and classmates to their Eid festivities to better acquaint them about Islam and Muslim culture. And thus it celebrated amongst the muslims with great enthusiasm and joy