Today (Friday September 1) has been confirmed as 

the first day of Eid al-Adha 2017 after the new moon crescent was sighted on August 22.

Saudi Arabia's High Judicial Court has confirmed that the first day of the Muslim festival falls today. But India and Pakistan will mark it from tomorrow (September 2).

The festival sometimes falls on different days around the world and is only confirmed by the sighting of the new crescent moon. 

Celebrations of Eid al-Adha vary around the world. Muslims greet each other by saying ‘Eid Mubarak' on during the festival which involves prayers and visits to friends and family.   

The festival commemorates Abraham’s sacrifice to God and in some parts of the world Muslims sacrifice livestock such as cows, sheep or goat.