(CNN) - The fast food chain Chik-fil-A is celebrating its 13th annual 'Cow Appreciation Day'.
Because of Cow Appreciation Day, the restaurant will be giving away free food but only if you are dressed like a cow.
There are even some costume tips on the company's website.
All adult customers have to do is show up in any type of cow attire and you'll get a free entree.
Children who dress up will get a free kid's meal.
Chik-fil-A calls Cow Appreciation Day its largest single day customer appreciation event.
The giveawaywill last until seven pm.