The celebration kicks off tonight with a concert highlighting Latino culture. Friday night the Chicago Symphony Orchestra will perform the music from Star Wars and more. Saturday Chicago native and rapper Common will perform with the Grant Park orchestra followed by fireworks. on Sunday there are lots of family friendly activities along with an evening concert. All events are free. Millennium Park opened on July 16, 2004. It was built on top of parking garages and commuter rail lines and it’s considered the world’s largest rooftop garden.