Sitges Carnival 2015. The Sitges Carnival is known as one of the greatest in Spain. This year the carnival will be held from February the 12h until February the 18th, 2015. Sitges Carnival features colourful parades with scantily dressed party people, street music, bands, and revelers with superlunary costumes. The two biggest parades of the festival both feature around 50 floats and annually there are more than 3.000 participants at the Sitges Carnival.