Former Arkansas Governor Mike Huckabee created the day, calling for a celebration after the fast food chain found itself in the middle of a controversy.
Chick-fil-A President Dan Cathy recently said he believes in the Biblical definition of marriage -- between a man and a woman -- and adding that he loves and respects anyone who disagrees.
Supporters of same-sex marriage have accused the chain of discrimination and are are calling for a boycott.
Chick-fil-A says it does not discriminate against anyone.
It is an unofficial Chick-fil-A Appreciation Day.