From May 1 through June 1, Shake Shack customers can get a free burger with a $10 or more purchase.
A new burger will be offered each week of National Burger Month.
- 5/1 – 5/11: SmokeShack
- 5/12 – 5/18: Bacon Cheeseburger
- 5/19 – 5/25: Avocado Bacon Burger
- 5/26 – 6/1: ShackBurger
https://shakeshack.com/blog/local-news/national-hamburger-month-is-here#/
