Eid-ul-Adha is celebrated on 10th of Zul-Hijjah.

On Eid-ul-Adha, not to eat any thing before going to Eidgah.

(Saheeh Bukhari, Saheeh Muslim)

On Eid day take a bath and wear a good dress.

(Saheeh Bukhari)

“Eid Salat” ought to be offered in an open ground.

(Saheeh Bukhari, Saheeh Muslim)

On Eid-ul-Adha, sacrifice the animal, after returning home from the Eidgah (After the salat).

(Saheeh Bukhari, Saheeh Muslim)

In case the sacrifice of the animal was offered before the salat, then offer another sacrifice after the salat of Eid.

(Saheeh Bukhari, Saheeh Muslim)

For three days sacrifice may be offered, i.e.. 10th, 11th and 12th of Zul-Hajj.

(Surah-Al-Hajj, Verse: 28)

Never to observe a fast on Eid-ul-Fitr and Eid-ul-Adha.

(Saheeh Bukhari, Saheeh Muslim)

In case the news of sighting of the moon has been received so late that the time for offering salat is over, then immediately break off the fast, and offer salat the next day.
(Saheeh Bukhari, Saheeh Muslim)

During the Eid days, young, minor girls may sing good rhymes to the tune of tambourine.

(Saheeh Bukhari, Saheeh Muslim)

On the day of Eid-ul-Adha, offer sacrifice at home, after having offered salat of Eid and listening the sermon.

(Saheeh Bukhari)

On the day of Eid-ul-Adha leave for Eidgah without eating anything. When back home, then eat after slaughtering the sacrificial animal.

(Rawah Ahmad Sanad Saheeh)

Any one who decides to offer a sacrifice from the beginning of Zul Hijjah till the sacrifice is offered, should neither cut off the nails nor the hair.

(Saheeh Muslim)

Any one who cannot afford a sacrifice, should also act in the similar manner, then after the salat of Eid, cut off the nails, trim the moustache, and shave off the pubic hair. By doing so he too will be granted requital of a sacrifice.

(Rawah Abu Dawood, Sanad Saheeh & Nasai, Sanad Saheeh)

Not to keep a fast on Eid-ul-Adha. Fasting on Eid-ul-Adha is unlawful and prohibited.

(Saheeh Bukhari, Saheeh Muslim)

The tenth of Zul-Hijjah is called as “Youm-e-Hajj-e-Akbar” meaning the day of great hajj.

(Saheeh Bukhari)