The first day of Eid Al Adha will fall on Sunday, August 11, after a Saudi Arabian observatory sighted the Dhu Al Hijja moon last week.
Sighting of the new moon marks the start of Dhu Al Hijja, the last month in the 12-month Islamic calendar.
While the confirmation was made in Saudi Arabia, the UAE traditionally follows the same start date for religious events.
This means workers in the UAE will have a public holiday from 11 to 13 August, with people returning to work on Wednesday 14 August.
Eid Al Adha is one of two major Islamic festivals and its celebrating is subject to the sighting of a crescent moon.