May 28 is National Hamburger Day and a range of chains are celebrating the occasion with deals and freebies on or around the holiday ...

This article originally appeared on USA TODAY: Burger King rolls out '31 Days of Deals' promotion offering free food and ...

Burger King, Wendy's and Shake Shack ... get 25% off orders of $20 or more (up to $6 savings). The promotion continues through June 8, with upcoming deals from Shake Shack, Taco Bell, and Starbucks.