Rauma’s founding day, Rauma Day, is celebrated annually on 17 April. Rauma was founded in 1442.

The birthday of Frans Hjalmar Nortamo, a dialect writer, professor and doctor from Rauma, on 13 June, is an established flag-raising day in Rauma. Nortamo is known for his stories written in the Rauma language.

Rauma Lace Week is a well-known annual city festival in Rauma. Rauma Lace Week is celebrated in the penultimate week of July. Flags are also flown in honour of the event.