SAN ANTONIO (KTSA News) — Friday is National Whataburger Day and to celebrate, the burger chain is serving up a big discount on burgers.
From 11 a.m. until 8 p.m., Whataburger Rewards members can get a classic #1 burger for just 75 cents.
In order to get the burger for less than a buck, you have to order it through the Whataburger mobile app…