Buy One, Get One FREE Chicken Sandwiches at Hardee’s & Carl’s Jr. Tomorrow, June 30th! June 29, 2014 by Jennie The links in the post below may be affiliate links. Read the full disclosure.Print Email Tomorrow, June 30th you can score Buy One, Get One FREE Big Chicken Filet Sandwiches as both Hardee’s & Carl’s Jr. restaurants. You can go here to print the Hardee’s coupon and here to print the Carl’s Jr one. These coupons can’t be combined with any other offers or discounts.