June 21st thru Sept 27, 2025. Music in the Plaza returns this year on select Saturdays from 7 to 10 p.m. from June 21 to September 27, first in Zabrocki Plaza, 17375 S. Oak Park Ave., before transitioning to the brand-new Harmony Square plaza across the street at Oak Park Avenue and North Street. Enjoy a wonderful evening listening to music under the stars!