The patron of San Nicolò d'Arcidano is Saint Nicholas of Bari, celebrated on 10 September.
The town lives a full year of festivals: Saint Isidore, between the last week of June and the first of July, Saint Margaret, on 20 July, and in mid-August the «Arcidano produce» showcase. The town holds the church of San Nicolò Vescovo and the Sa Pratza de Ziu Emiliu Cera.