Saint Cecilia’s Day is observed in Mexico on November 22, celebrating the patroness of musicians, Saint Cecilia. This day is particularly significant for mariachis, who consider it their "professional holiday." In Mexico City, mariachis gather at Plaza Garibaldi, the heart of mariachi music, where they perform festive songs in traditional costumes. The celebration includes a procession to the Basilica of Our Lady of Guadalupe, honoring their patron saint. Mariachi music, which originated in the rural areas of Guadalajara in the 18th century, is characterized by groups typically consisting of guitars, a guitarrón, trumpets, and violins, among other instruments. This vibrant celebration showcases the cultural heritage and musical traditions of Mexico.