The UAE Ramadan Moon Sighting Committee will meet at sundown today to look for the new crescent.
According to the International Astronomical Centre, there's a good chance that Monday May 6 will be the first day of Ramadan.
Officials across the country said they will inform the committee if there are any sightings reported.
Schools in Dubai must start by 8.30 am and finish before 1.30 pm during the holy month.
Public transport timings will also be effected, with Dubai Metro open from 5:00 am to midnight during the weekday, and from 10:00 am to 1:00 am on the weekend.
Paid parking hours in Dubai will also be split during Ramadan, with a two-hour break around Iftar.