The Catholic Church in Brazil celebrates Saint Joseph's Day on March 19, honoring Saint Joseph, the patron saint of families and workers. A noteworthy tradition during this day involves believers writing letters to the saint, expressing their requests for love, employment, and family protection. These letters often contain personal intentions and are left in churches, bibles, or significant locations, symbolizing the act of delivering their concerns to the saint.

The practice of writing letters to saints has deep historical roots within the Church, drawing parallels to ancient customs such as ex-votos (thanksgiving offerings) and written petitions. By writing these letters, believers can better organize their thoughts, translating their worries into tangible requests. The act of leaving their letters at sacred sites is viewed as a demonstration of their faith, helping them to cultivate trust and patience while waiting for responses to their prayers.

As Saint Joseph is particularly revered in São José dos Campos, this tradition is especially significant in the region. Local parishioners engage in this ritual as a way to connect spiritually with the saint, fostering a sense of community and shared hope. This observance not only emphasizes religious practices but also highlights the cultural importance of faith in addressing life's challenges, promoting a sense of solace among the participants.