La Diada, celebrated on September 11, is the national day of Catalonia. It commemorates the fall of Barcelona in 1714 during the War of the Spanish Succession, marking the loss of Catalan institutions and rights. The day is a symbol of Catalan identity and culture. On La Diada, various events take place, including parades, speeches, and cultural activities. Many people display the Catalan flag and participate in demonstrations advocating for Catalan independence. The day serves as a reminder of the region's history and its ongoing quest for autonomy within Spain.