Abu Dhabi Police have issued 39 fines for illegal social gatherings since the beginning of Ramadan.
These were given for breaching Covid-19 rules which ban gatherings of more than 10 people, a police official said on Sunday.
Fines can reach Dh10,000 ($2,722) for organisers and Dh5,000 for each participant.
Police urged the public to follow coronavirus rules.
"Some Ramadan traditions and social norms have become very dangerous during the current pandemic,” a police official said.
“They contradict precautionary measures and regulations to curb the spread of Covid-19.”
Examples include “big family gatherings and iftar banquets that are held for a large number of relatives and friends”, said the official.
Police urge the public to report any breaches by calling 8002626; sending a text message to 2828; or by emailing the police's security service firstname.lastname@example.org.
Reports can also be made on the public prosecution smartphone app.
Typical Ramadan traditions – such as tents at hotels and communal iftars – are not allowed this year, to curb the spread of Covid-19 as the vaccine programme continues its rollout.
The UAE has one of the world's fastest vaccination drives, with 10 million doses administered in just a few months.