Muslims throughout the Middle East region will celebrate Eid al-Adha (Feast of Sacrifice) July 9-12. The exact dates, which depend on local lunar sightings, may vary by country. Eid al-Adha is one of the most sacred holidays in Islam; the high point of the observance is the conclusion of the annual Hajj (pilgrimage) to Mecca, Saudi Arabia.
Millions of Muslims worldwide this week will celebrate Eid al-Adha, an Islamic religious festival commemorating Prophet Abraham's faithfulness to God after being tested with the unfulfilled command to sacrifice his son.
The holiday also marks the end of the yearly Hajj pilgrimage. It is different from Eid al-Fitr, another major Muslim holiday celebrated each May to mark the end of the holy month of Ramadan.