Cow Appreciation Day July 13th 2008: http://www.chick-fil-a.com/#thecows
See their site for a cute slide show of past costumed meal winners!
Dress like a cow, or wear cow accessories or makeup to your local Chik Fil A and receive a free entree. Kids get a Kids Meal. Even cow print accessories might get you a free meal.
Download PDF from Chik Fil A for more info: http://www.chick-fil-a.com/downloads/CFA_CAD_1pgr.pdf
What a fun way to dress up!