Happy Eid al-Adha

Eid al-Adha (Arabic: عيد الأضحى‎ ‘Īd al-’Aḍḥá, IPA: [ʕiːd al ʔadˁˈħaː], "feast of sacrifice") or "Festival of Sacrifice" or "Greater Eid" is an important religious holiday celebrated by Muslims worldwide to commemorate the willingness of Abraham (Ibrahim) to sacrifice his son Ishmael (Isma'il) as an act of obedience to God, before God intervened to provide him with a cow— to sacrifice instead.
Eid al-Adha is the latter of two Eid festivals celebrated by Muslims, whose basis comes from Sura 2 (Al-Baqara) Ayah 196 in the Qur'an. Like Eid ul-Fitr, Eid al-Adha begins with a Wajib prayer of two Raka'ah (units) followed by a sermon (khuṭbah).
The word "Eid" appears in Sura al-Mai'da ("The Table Spread," Chapter 5) of the Qur'an, meaning 'solemn festival'.
Eid al-Adha is celebrated annually on the 10th day of the 12th and the last Islamic month of Dhu al-Hijjah (ذو الحجة) of the lunar Islamic calendar. Eid al-Adha celebrations start after the Hajj, the annual pilgrimage to Mecca in Saudi Arabia by Muslims worldwide, descend from Mount Arafat. The date is approximately 70 days (2 Months & 10 days) after the end of the month of Ramadan, i.e. Eid-ul-Fitr. Ritual observance of the holiday lasts until sunset of the 13th day of Dhu al-Hijjah.[

Men, women, and children are expected to dress in their finest clothing to perform Eid prayer (ṣalātu l-`Īdi) in a large congregation is an open waqf field called Eidgah or mosque. Those Muslims who can afford, i.e Malik-e-Nisaab; sacrifice their best domestic animals (usually a cow, but can also be a camel, goat, sheep or ram depending on the region) as a symbol of Abraham's willingness to sacrifice his only son. The sacrificed animals, called Uḍhiyyah (Arabic: أضحية‎, also known by its Persian term, "al-Qurbāni"), have to meet certain age and quality standards or else the animal is considered an unacceptable sacrifice. This tradition accounts for more than 100 million slaughtering of animals in only 2 days of Eid. In Pakistan alone nearly 10 million animals are slaughtered on Eid days costing over US$ 3 billion.
The meat from the sacrificed animal is divided into three parts. The family retains one third of the share; another third is given to relatives, friends and neighbors; and the other third is given to the poor and needy. The regular charitable practices of the Muslim community are demonstrated during Eid al-Adha by concerted efforts to see that no impoverished person is left without an opportunity to partake in the sacrificial meal during these days.
During Eid al-Adha, distributing meat amongst the people, chanting the Takbir out loud before the Eid prayer on the first day and after prayers throughout the three days of Eid, are considered essential parts of this important Islamic festival. In some countries, families that do not own livestock can make a contribution to a charity that will provide meat to those who are in need.