Sunday in Barcelona is traditionally a day of rest, and 90% of retail shops are closed due to strict Catalan regional laws. This includes major department stores like El Corte Inglés, clothing chains (Zara, H&M), and almost all neighborhood supermarkets. For 2026 travelers, it is vital to "stock up" on Saturday if you are staying in an apartment. However, there are a few notable exceptions: the Maremagnum Mall at the port is the only major shopping center allowed to open on Sundays. Additionally, most museums, restaurants, and tourist attractions (like the Sagrada Família and Park Güell) operate normally. Many museums even offer free admission on Sunday afternoons (after 3:00 PM) or the first Sunday of the month, making it a "cultural day" rather than a shopping day. Small "convenience" stores under 150sqm are also legally permitted to stay open for essentials.