The patron saint of Diano d'Alba is Saint John the Baptist, celebrated on 24 June in the church dedicated to him.
The main religious feast of the town is the patronal feast of Saint John the Baptist: the saint is officially recognised as the patron of Diano d'Alba, and the feast constitutes the most important holiday of the year. The municipal territory also holds the Chapel of San Sebastiano and the churches of Santa Croce and Santa Lucia.
