The patron of Sergnano is Saint Martin, celebrated on 11 November with the Sagra di San Martino, in the Church of San Martino Vescovo.
The calendar of local feasts also includes the Palio Sergnanese, the Maggio Sergnanese, and, between early September and late August, the Festa del Binengo, tied to the Shrine of Santa Maria del Binengo. The town also borders the Serio River Park.