I got the following story from my friend Joel.
Joel: "just letting you know I happened to be wearing a UNC t-shirt today when I went to the chick-fil-a on a lunch break. I asked for a number 1 combo for here when the employee asked if I knew the phrase, to which I obviously did not. She helped me out and informed me that if you wear UNC apparell to chick-fil-a in the triangle area (not on campus locations) on Thursdays and say "Tarheel fans eat more chicken", you get a free chicken sandwich [or biscuit] with the purchase of a large drink. I got my free sandwich and googled for an announcement which I found on the News and Observer site."
Or just look below, I have pasted their post on the free chicken.
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Here's a good one for fans of Duke, NC State and UNC... Our area Chick-fil-A franchisees are inviting you to earn a freebie by showing your team spirit and purchasing a large drink.
Each school has been assigned a day of the week (Duke is Mondays, NC State is Wednesdays and UNC is Thursdays). On those days, if you show up at Chick-fil-A wearing school apparel and declare at the counter that "Duke Fans Eat More Chicken," "Wolfpack Fans Eat More Chicken" or "Tarheel Fans Eat More Chicken," you will be rewarded with a free chicken biscuit at breakfast time or a free chicken sandwich if you come later in the day. Like I said, a large drink purchase is required, but that seems like a decent deal to me.
The offer is good at participating stand-alone Chick-fil-A stores in the Triangle (but not the ones on the college campuses) It is also a limited-time offer, though no ending date for the promotion has been set yet.
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So, to recap,
Monday: wear navy blue
Wednesday: wear red
Thursday: Any heels paraphenalia will work
Head to Chick-fil-A, say "[insert appropriate mascot] fans eat more chicken"
Buy a large drink
Enjoy your free Chicken Sandwich or Biscuit.