Cars were decked out with Mexican Flags as people got out of their vehicles to celebrate in the streets. CHICAGO (WLS) -- Thousands celebrating Mexican Independence Day flooded the streets in downtown Chicago overnight, creating a major traffic gridlock. The 2022 Little Village Chamber of Commerce Mexican Independence Day will take place on Sunday, September 11, 2022 and this years parade theme is, “ Nuestra Unidad es Nuestra Fortaleza,” or “Our Unity is Our Strength,” which serves as a reminder that our culture and unity as a community holds strong.