M Burger is celebrating nine years in Chicago by once again treating its customers to a free single cheeseburger with any purchase on Wednesday, March 20. Yes, that’s right: You’ll score a gratis patty with the purchase of any menu item, including French fries ($2.49) and ice-cream cones ($1.99). The promotion is valid at all five M Burger locations on March 20:

M Burger Birthday Single Cheeseburger

– The Thompson Center at 100 West Randolph Street
– River North at 5 West Ontario Street
– Water Tower Place at 835 North Michigan Avenue
– Streeterville at 161 East Huron Street
– Aurora at 1650 Premium Outlet Boulevard

Wash down your free burger with the chance to win M Burger shakes for a year. All you have to do is text “Birthday2019” to 70717 between 9am and 9pm from March 15 to 20.

Now that’s what we call a party favor.