The Freebie Blogger found this information:
Customers who visit any Chick-fil-A restaurant on Labor Day, Sept. 7, wearing any sports-related apparel will receive a signature Chick-fil-A Chicken Sandwich for free. It is mentioned towards the bottom of the article here. Hopefully I will have more information as the date gets closer. Click here to find a location near you.
While I cannot find any information on the company website, I’m going to pencil this into my calendar in hopes that it comes to fruition. I’ll keep you posted as I hear more.