This Post May Contain Affiliate Links. Please See Our Disclosure Policy Here. Chick Fil A Free Fry Day March 4th! SharePin Chick Fil A Free Fry Day is coming to a city near you on March 4th! From 2pm – 4pm on March 4th you can get a Free Medium Fry when you mention that you’re there to try the new Heinz Dip and Squeeze Packets of Ketchup.