5 things to do in Arlington Heights, IL — Sunday, August 30, 2026

1. Harold Night

   Community at iO Theater, starting 7:30 p.m.

   See the show that started it all, and experience the iO Theater’s groundbreaking, signature improv form: The Harold! This long-running, weekly improv tradition is double-headlined every Sunday by two of the iO Theater’s…

   Details from the organizer

2. 8 events, Sunday, August 30

   On the calendar at St. Mary of the Angels Parish, starting 1 p.m.

   8 events, Sunday, August 30

   Details from the organizer

3. Arts on Devon

   Community at Republic Bank Parking Lot, starting 3 p.m.

   The nonprofit Rogers Park Business Alliance (RPBA) and D evon Avenue Special Service Area (SSA) #43 are excited to announce the return of the Arts on Devon festival on Sunday, August 30, from 3 p.m. to 8 p.m. in the Rep…

   Details from the organizer

4. Best of The Second City

   Community at The Second City, starting 3:30 p.m.

   Find out for yourself why The Second City has been the first name in laughter for over sixty years! From the stages that launched the careers of Tina Fey, Stephen Colbert, Steve Carell and more comes the next generation…

   Details from the organizer

5. The 11pm Show

   Community at iO Theater, starting 11 p.m.

   Continuing the rich tradition of late night improv, join the veteran cast of THE 11PM SHOW every Friday at 11PM as they perform late night, artistic improv for the love of the art form!

   Details from the organizer

Sources

• Official city, county and parks department calendars — Government event calendars for each covered market
• Public library event calendars — Library programming published by local systems
• Convention and visitors bureau calendars — Destination-marketing organizations for each city