Eid-Al-Adha is one of the major holidays of Islam. According to Muslim tradition, it celebrates the sacrifice that Abraham was willing to make of his own son Ishmael when he was commanded to show his commitment to Allah. At Allah's direction, the angel Gabriel substituted a lamb for Ishmael, after Allah was convinced that Abraham would indeed sacrifice Ishmael to prove his faith.
In this day, Muslims celebrate in several ways. A large feast is the high point of the day. The name of the holiday, Eid Al-Adha, means "The Feast of theSacrifice." An animal is sacrificed, in much the same way that Abraham sacrificed a lamb. One-third of the meat is given to the poor, and the rest goes to the holiday feast. Children get gifts to commemorate the holiday, and special prayers are said throughout the day.Eid Al-Adha takes place on the 10th and last day of the Hajj, the celebration of holy pilgrimage to Mecca, in the 12th month of the Islamic lunar calendar. (In 2017, this is September 1st on Western calendars.) Muslims the world over are encouraged to make a pilgrimage to Mecca and celebrate .
At the end of the Hajj(annual pilgrimage to Makah),Muslims throughout the world celebrate the holy day of Eid al-Adha (Festival of Sacrifice ). In 2016,Eid al-Adha will begin on approximately September 11th/12th , and will last for three days.It is the second of the two major Muslim holy days.
The other is Eid-ul-Fitr which follows Ramadan-- a lunar month of partial fasting.It is celebrated on the 10th of Zul-Hijjah, the last month of Islamic calendar. Because the date of theFeast of Sacrifice is determined by a lunar calendar,it is observed about 11 days earlier each year with respect to the Gregorian calendar.
Islamic months begin at sunset on the day when the lunar crescent appears after the new moon, and can be sighted by the unaided eye.As a result, although the phases of the moon can be predicted accurately, the moon's visibility at a given place on Earth cannot be estimated in advance.Thus, the feast day has always been celebrated on different days in various areas of the world