"The holidays are all about giving and so is Whataburger. So, we are happy to share “The Twelve Days of Whataburger” with you—a special promotion starting December 1st, where every other day until December 23rd, we’ll email you a coupon for a Free Food item. In order to receive these free offers once they start on December 1st, along with other future promotions, please click here to sign up."

Updates:

December 01:  Day 01 -  Click here to redeem on the 2nd.  (Free french fries)
December 03:  Day 02 -  Click here to redeem on the 4th.  (Free taquito)
December 05:  Day 03 -  Click here to redeem on the 6th.  (Free fried pie)
December 07:  Day 04 -  Click here to redeem on the 8th.  (Free Dr. Pepper)
December 09:  Day 05 -  Click here to redeem on the 10th. (Free Justaburger)
December 11:  Day 06 -  Click here to redeem on the 12th. (Free Breakfast on a Bun)
December 13:  Day 07 -  Click here to redeem on the 14th.  (Free fried pie)
December 15:  Day 08 -  Click here to redeem on the 16th.  (Free taquito)
December 17:  Day 09 -  Click here to redeem on the 18th.  (Free Justaburger)
December 19:  Day 10 -  Click here to redeem on the 20th.  (Free french fries)
December 21:  Day 11 -  Click here to redeem on the 22th.  (Free shake or malt)
December 23:  Day 12 -  Click here to redeem on the 24th.  (Free Whataburger)