Redeem this digital coupon to eat for free.
By Joseph Green on May 15, 2026
All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission.
Do you have big Friday plans? You should know that May 15 is officially National Slider Day, and White Castle is celebrating this special occasion by giving away free food with absolutely no strings attached. That’s a real rarity nowadays.
Most “free food deals” require you to jump through hoops or spend at least $10 to qualify, but White Castle is offering a genuine opportunity to secure a tasty snack without spending a dime.
SEE ALSO: T-Mobile has dropped the Apple iPhone 17 for free — how to claim yours now
And the redemption process is refreshingly simple: Customers can simply use a digital coupon available on White Castle’s website and social media channels or enter the code SLIDERDAY on the White Castle app to qualify.
We know you’re looking for the catch, but there isn’t one. This generous offer is valid for one individual Cheese Slider or Original Slider per person. You can’t walk in and demand the world for free, but lunch is sorted.