To mark Eid al-Adha — Arabic for the Festival of Sacrifice — Muslims traditionally slaughter a sheep or cow and give away part of the meat to the poor as an act of charity. Then they have a big family meal with sweets. Children get gifts of new clothes.

Adha, a period of "communal enjoyment" for Muslims worldwide, has officially arrived. Here's what we've learned about the Islamic holiday.

Adha, a time for prayer and charity. The religious festival occurs over three to four days and is one of the major Islamic celebrations observed by Muslims every year. JONES ENTERS RACE: Jolanda Jones jumps into race for Houston's 18th Congressional District Muslims in Houston are expected to gather at Islamic centers and mosques for special prayers to mark the occasion,