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

Adha, the festival of sacrifice by offering prayers in mosques and open spaces before sacrificing animals. (AP video by Muhammad Farooq, Shonal Ganguly and Al Emrun Garjon)

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,