llini Union Trick-or-Treat! All departments are invited to participate with a table and giveaways in an Illini Union Trick or Treat event for students on Tuesday, October 29, 2024 from 7-9pm. You are invited to distribute information, giveaways, and candy from your department to current students. Event will include a custome constest. Register to Participate. The last day to register is Monday, October 28, 2024.