Tuesday is free cone day at Haagen-Dazs.
Just visit a participating Haagen-Dazs ice cream shop on May 13 from 4 to 8 p.m. and you can get a free small cone with any flavor (depending on what's in stock).
The Oak Park Mall location is participating.
Check to see if another Haagen-Dazs location is participating here: http://www.haagendazs.com/Find/
By the way, if it seems like there was a free cone day just last month, there was! Ben & Jerry's hosted its free cone day on April 8.