Fiestas de San Isidro (Feast of Saint Isidore) is an annual celebration held in Madrid, Spain, spanning the month of May and early June, honoring Saint Isidore, the patron saint of the city. The festival features a wide range of events, including bullfights, zarzuela performances (a traditional Spanish operatic musical form), parades, and cultural activities. Madrid’s streets come alive with music, dance, and traditional food, such as cocido madrileño (a local stew). The event is a celebration of Madrid's cultural heritage and local traditions, attracting both locals and tourists to join in the festivities. The highlight is often the bullfights held at the Las Ventas bullring, accompanied by vibrant street parties and processions honoring the city’s patron saint.