In 2017, Eid al-Adha will start on Friday, September 1. Muslim scholars have now confirmed the date. Eid al-Adha will end four days later on Tuesday, September 5.
Whereas Eid al-Fitr comes at the start of the month of Shawwal (after the end of Ramadan), Eid al-Adha is towards the middle of a month.
It starts on the 10th day of Dhu al-Hijjah, the 12th and final month in the Islamic calendar.
Eid al-Adha lasts until the 13th day of the month.