The cloudy weather meant the moon was not spotted in the UK on Thursday so the New Crescent Society declared Eid on Saturday, but it was seen in Saudi Arabia and Morocco and many Muslims celebrated Eid on Friday.
The New Crescent Society is a British grassroots astronomy network founded in 2016, which seeks to unite British Muslims by following a sighting of the moon in the UK.
Organiser Hamza Mutahir Khan, who has been spotting the moon every month for six years, said the network was growing and becoming more recognised.
“Six years ago there was only two or three people and over the years it’s been a communal thing with the community getting to do it more often,” he said.
“The mission and the vision is to put the whole of English Muslims regardless of background under one moon, as Muslims together.
“If you don’t want to import or outsource the moon, there’s always the moon above us to follow.”