Taco Bell will be offering a $5 National Taco Day Gift Set that includes: Nacho Cheese, Cool Ranch, Fiery Doritos Locos Tacos, and the Crunchy Taco. On the Border Mexican Grill & Cantina is offering $0.50 mini crispy tacos all day. Chevy’s Fresh Mex is holding a special contest: Customers who finish a 4-pound taco within 30 minutes will be awarded free tacos for one year. Customers at Taco John’s locations will get a free taco when they present a coupon available on the chain's social media accounts. Del Taco is offering a buy-one-get-one deal on its double-layer queso crunch taco if you sign up for the rewards club on its website.