Eid al-Adha “festival of the sacrifice”, also called Feast of the Sacrifice, the Major Festival, the Greater Eid, Kurban Bayram (Turkish: Kurban Bayramı; Serbo-Croat-Bosnian: kurban-bajram), Eid-e-Qurban (Persian: عید قربان) and Baqr-e Eid (Hindustani, Urdu: بقر عید), is an significant religious holiday celebrated by Muslims global to honour the inclination of the prophet Ibrahim to sacrifice his young first-born son Ismail a as an performance of submission to Allah’s command and his son’s recognition to being forfeited, before Allah interfered to provide Ibrahim with a Lamb to sacrifice instead.
In the lunar Islamic calendar Eid al-Adha held on the 10th day of Dhu al-Hijjah and lasts for four days. In the global Gregorian calendar, the dates differ from year to year, itinerant approximately 11 days prior in every year.
Eid al-Adha is the concluding of the two Eid holidays, the previous being Eid al-Fitr. The base for the Eid al-Adha derives from the 196th verse of the 2nd sura of the Quran. The word “Eid” seems once in the 5th sura of the Quran, with the meaning “solemn festival”.
Like Eid al-Fitr, Eid al-Adha initiates with a Sunnah prayer of two rakats surveyed by a sermon (khuṭbah). Eid al-Adha merriments jolt after the ancestry of the Hajj from Mount Arafat, a hill east of Mecca. Ceremonial adherence of the holiday lasts till sunset of the 12th day of Dhu al-Hijjah.
Eid sacrifice may take abode till sunset on the 13th day of Dhu al-Hijjah. The days of Eid have been singled out in the Hadith as “days of remembrance”. The days of Tashriq are from the Fajr prayer of the 9th of Dhul Hijjah up to the Asr prayer of the 13th of Dhul Hijjah (5 days and 4 nights). This equals 23 prayers: 5 on the 9th-12th, which equal 20, and 3 on the 13th.
Source: Wikipedia