Si on avait besoin d'une cinquième saison (If We Needed a Fifth Season), also known as Les Cinq Saisons (The Five Seasons), is the second studio album by French-Canadian progressive rock band Harmonium, released on 15 April 1975 by PolyGram. The album marked a departure from the folk rock sound of the band's self-titled debut album towards a unique progressive rock sound, and also marked the growth of the band, as members Serge Fiori, Michel Normandeau and Louis Valois were joined by Pierre Daigneault and Serge Locat.