On Wednesday, March 23, M Burger is celebrating it's 6th birthday (as a concept). As they annually do, they will be giving away complimentary burgers at all locations (with any purchase) as a thank you to the neighborhoods and communities they are in. Free burger options include hamburgers, cheeseburgers, signature M Burgers and any burger on the Secret menu. All you need to do is make one purchase (yes, an order of fries counts) and the free burger is yours. Get after it!