Print a coupon to receive a free Whataburger today (Dec. 23) anytime from 11 a.m. to 3 p.m. This is the last coupon of the “12 Days of Whataburger” holiday promo. You must come inside the store to get the freebie, but you can get it to go. Limit of one coupon per person (if you’re bringing kids, print one for each of them).