On Sunday 12 September the event at the East London Mosque and Muslim Centre in Whitechapel saw an exhibition, a bazaar, funfair and food markets.
A spokesman for the East London Mosque Trust said the event was the “first of its kind in the London borough of Tower Hamlets.”
Visitors on the day could also find out more about the history of the mosque, which was first established in 1910.
For a number of years the mosque had no permanent base and its members met in hired town halls and other community centres. But in 1941 they bought and renovated three houses on Commercial Street.
It was later given land and temporary facilities in Whitechapel Street from the local council and the current building was opened in 1985.
Eid ul-Fitr is a Muslim celebration that marks the end of Ramadan. It is celebrated with prayer and a daytime feast.