Móra la Nova Main Festival Activity · Móra la Nova, Ribera d'Ebre, Tarragona Image of Móra la Nova, not of the place itself. The main festival of Móra la Nova, in the Ribera d'Ebre (Tarragona), is the most representative celebration of the municipality and is held on the first Sunday of August in honour of Sant Domènec de Guzmán. Among its events, the Nits Blanques dance stands out, a kind of social presentation for young women reaching adulthood, a distinctive tradition that sets this main festival apart from those of other towns in the comarca. Photo: Enfo (CC BY-SA 4.0) What to see and do in Móra la Nova