How to get a free slider at White Castle. Foodies won't have to buy anything to receive the free burger. White Castle customers can redeem the offer by using the code SLIDERDAY on the app.

COLUMBUS, Ohio — White Castle is giving away free sliders Thursday for “National Slider Day.” White Castle introduced National Slider Day in May 2015 to honor the slider. “The introduction ...

How to get a free slider at White Castle. Foodies won't have to buy anything to receive the free burger. White Castle customers can redeem the offer by using the code SLIDERDAY on the app.

May 12, 2025. White Castle will celebrate National Slider Day on May 15 by offering customers a free Original Sliders. There is no purchase necessary, but customers can use a digital coupon available ...

How to get a free slider at White Castle. Foodies won't have to buy anything to receive the free burger. White Castle customers can redeem the offer by using the code SLIDERDAY on the app.