The West Coast’s largest Taiwanese American celebration returns to Union Square on Saturday, May 9, 2026, from 10:00 AM to 4:00 PM. The free, family-friendly festival showcases Taiwanese culture, food, performances, and community vendors, drawing more than 10,000 visitors a year. Where: Union Square, San Francisco. Cost: Free. Source: TAP-SF, Do The Bay event listing for the 33rd Annual Taiwanese American Cultural Festival.