You’ll just need a little more cowbell or at least a cow suit to snag some free Chick-fil-A at Atlanta locations Tuesday.

For the 13th year, Chick-fil-A will hold its Cow Appreciation Day event at its more than 2,100 stores nationwide , including its dozens of locations in metro Atlanta. From opening until 7 p.m. Tuesday, adult customers who dress in any cow attire, from "head-to-hoof" according to the restaurant's website, will be given a free Chick-fil-A entree, including the Egg White Grill, Smokehouse BBQ Bacon sandwich, Original Sandwich and more. Children clad in their best moo costume will receive a free kids meal.

It’s the restaurant’s largest, single-day customer appreciation event, and it celebrates Chick-fil-A’s popular “Eat Mor Chikin” Cows, that have been popping up on billboard across the country since 1995.

“Every year we are amazed at the number of customers who participate in Cow Appreciation Day,” Jon Bridges, Chick-fil-A’s senior vice president and chief marketing officer, said in a statement.

July 12, 2016 Atlanta: Alex Rodriguez, Store Operator at Chick-fil-A on Hammond drive greets Issac Timberline,1, and Nolan Timberline,3, on Cow Appreciation Day on Tuesday, July,12. Customers who come to Chick-Fil-A wearing anything cow-like will get a free entree from open to 7 p.m. on Tuesday, July 12. In the past, Cow Appreciation Day has been on a Friday, however this year the celebration is held on Tuesday to reduce heavy crowds. EMILY JENKINS/ EJENKINS@AJC.COM

Credit: Emily Jenkins

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Credit: Emily Jenkins

Last year, more than 1.6 million free entrees were given away to customers on Cow Appreciate Day. Just as in past year, Chick-fil-A encourages those that participate to share photos on social media using #CowAppreciationDay. There’s also a Cow Appreciation Day Snapchat filter, so snap, tweet IG post till the cows come home.