Eid celebrations in Islam are the holiest in the Islamic calendar with Eid al-Adha being the most widely celebrated and holiest of all.
This year, the Muslim celebration of Eid al-Adha begins on Thursday, August 31st and goes until the evening of Friday, September 1st. It honors the willingness of Ibrahim to sacrifice his son to show submission to Allah’s command. Just when Ibrahim was about to kill his son Ishmael upon Allah’s command, God put a sheep in his place. Muslims use Eid al-Adha to celebrate Ibrahim’s complete obedience to the will of God and is a reminder of their own willingness to sacrifice anything to follow God. Some Muslims will sacrifice a cow, goat or sheep in honor of Eid al-Adha. Muslims will often take a day off work, wear their best clothes, and attend a prayer service at their Mosque.
Eid al-Fitr is an important religious holiday celebrated by Muslims worldwide that marks the end of Ramadan, the Islamic holy month of fasting. This year, Eid al-Fitr occurred on June 24-25.
(Above are excerpts from Metro UK).