8. T he daemon of Badalona Badalona daemon is the most important traditional festival in Badalona, and is the central act of the City Festival is held the first weeks of May and is known as Fiestas de Mayo . On May 10 from ten at night is held at the Rambla de Badalona, facing the sea, the Cream of the Devil, which is the culmination of a series of events that make up the Nit de Sant Anastasi .