http://www.chick-fil-a.com/Cows/Appreciation-Day

For one day only, black and white spots, cow bells and furry ears will be appropriate attire at Chick-fil-A restaurants all across the nation. In celebration of Cow Appreciation Day (an unofficial yet nationally recognized holiday), Chick-fil-A will award a FREE Meal (breakfast, lunch or dinner) to any customer who comes to one of our 1,600+ restaurants fully dressed as a cow, and a free entree for partial
cow attire.