This is when Ramadan will likely start in Oman

Muscat: Oman will be sighting the Ramadan moon on Monday, 12th April 2021.

Astronomical Affairs Department at MERA said, “Astronomical calculations made by the Astronomical Affairs Department at the Ministry of Endowments and Religious Affairs MERA regarding the sighting of the crescent of the month of Ramadan 1442. On Monday, on Shaban 29, 1442, corresponding to April 12, 2021, where the crescent will remain for approximately 20 minutes after sunset."