Tiradentes Day 2022 will be marked on Thursday, 21st of April. The occasion is not an international holiday but it plays a significant role in the Brazilian culture. Tiradentes aka Joaquim Jose da Silva Xavier is considered a national hero of Brazil and patron of the Military Police. 🙏🏻 Tiradentes Day 2022 in Brazil: Date, History and Significance of Marking the Death Anniversary of Joaquim José da Silva Xavier.