Burger King: FREE FRIES FRIDAY! This post may contain affiliate links. Please see the full disclosure policy here. Posted on December 13, 2011 Written by Mary Leave a Comment Burger King is offering FREE fries this Friday,12/16. There is NO purchase necessary, one Value size fry per person at participating locations. If you’re in my area – I saw the sign that ours (Debary) IS participating!!! Thanks, Good Deal Mama!