Families are set to gather to celebrate the end of Ramadan, which usually lasts between 29 and 30 days.
During Ramadan Muslims do no eat, drink, have sex or smoke between sunrise and sunset.
However, the end date changes each year, as the timing is based on the lunar calendar.
This calendar is 11 days shorter than the Gregorian calendar.
Ramadan will end tonight (Thursday, June 14).
The first day of Shawwal, the tenth month of the lunar Islamic calendar, will mark the end of Ramadan and the beginning of Eid al-Fitr.
A moon-sighting committee will hold a meeting tonight after Maghrib prayer at the Abu Dhabi Judicial Department, in order to detect the beginning of Shawwal.
How do you celebrate Eid al-Fitr?
Eid al-Fitr marks the end of the Islamic holy month and is expected to begin on Friday, June 15, if the moon is seen in the sky,
The holiday, which is also known as the “Breaking of the fast”, usually lasts three days and involves communities indulging in a huge feast.
On the first morning, Muslims will join in the Eid prayer either outdoors or in mosques.
People will then give family and friends gifts, or call loved ones to wish them well.
Eid Mubarak is a traditional Muslim greeting used during this period.
The word Eid translates as celebration and Mubarak means blessed.
People may also decorate their homes with string lights, lanterns and brightly coloured banners.
Traditional clothing is usually worn too.