White Castle is celebrating National Slider Day by giving away a FREE Original Slider! Swing by your local White Castle on May 15th to claim this tasty treat and join the celebration.

To get your free slider, simply show the coupon or use the code SLIDERDAY in the White Castle app — no purchase necessary. It’s the perfect excuse to enjoy a classic favorite and share the fun with friends or family. Don’t miss out on this one-day-only offer!

Get ready for a tasty treat! On May 15th, White Castle is giving away a FREE slider at participating locations. Known for their iconic, craveable sliders, White Castle is offering you the perfect chance to enjoy one on the house.