The patrons of Alzate Brianza are Peter and Paul, celebrated on 29 June in the Church of Santi Pietro e Paolo.
On 8 September, coinciding with the religious feast of the Nativity of Mary, the age-old fair of the Madonna di Rogoredo is held, a livestock-farming event held every year at the shrine dedicated to her. The town also holds the Castello Durini and Villa Durini.