Id-ul-Zuha or Eid al-Adha, also called the "Sacrifice Feast," or "Bakr-Id" is the second of two Muslim holidays celebrated worldwide each year and is considered the holier of the two. It honors the willingness of Ibrahim (Abraham) to sacrifice his son, as an act of obedience to God's command.Like Eid al-Fitr, Id-ul-Zuha or Eid al-Adha begins with a prayer of two rakats, followed by a sermon. Traditionally, the festival of Eid al-Adha is celebrated two days after the beginning of the Hajj pilgrimage. The starting date of this festival depends on the sighting of the new crescent moon. It begins on the 10th day of the one of the holiest months of the Islam calendar.
Here are pictures from across India of Eid al-Adha celebrations: