The patron of Pietrarubbia is Saint Sylvester, celebrated on 31 December, to whom the Chiesa di San Silvestro is dedicated.
At the end of May, in the locality of Mercato Vecchio, the "Festa d'la Falciatura" recalls the farming customs of past centuries, with food stands (the speciality is roast suckling pig), demonstrations of old crafts and a market show of period equipment.