For the final week, May 26 to June 1, the burger chain is giving a free Shackburger with any purchase over $10. To redeem, you'll need to order through the app, online or at an in-store kiosk ...

Interested patrons can get their free burger by ordering on the Shake Shack app or online with code “BURGERMONTH,” or by visiting a store in person. National Hamburger Day is May 28 (Alamy/PA) ...

According to USA Today, Burger King started offering deals a few days ahead of National Hamburger Day, giving free perks to members of its free "Royal Perks" rewards program. On Memorial Day, the ...