Today's festival is from Islam and is called Eid-al-Adha, also known as the Sacrifice Feast. It is a 4 day festival honoring the willingness of Abraham to sacrifice his son for God. Those who can, donate an entire halal animal to neighbors or those less fortunate. The sacrificed animal is known as Udiyyah and has to meet a certain set of rules to be considered Halal.
If you would like to learn more about this festival, click here.