Be sure to mark your calendars because National Cheeseburger Day is coming up on Monday, September 18th! To celebrate, better-burger fast casual chain Smashburger will be offering $5 Classic Singles from Monday, 9/18 through Wednesday, 9/20.   

Customers can claim this deal in-store or on Smashburger’s website and app by using the code: SMASH23. This offer includes Classic Singles, Classic Single Turkey Burgers and Classic Single Black Bean Burgers.