In 2015, White Castle introduced National Slider Day, honoring its original steamed slider with onions. So prolific is the ...

You can get a free Original Slider at White Castle on May 15 to celebrate National Slider Day. No purchase is required. The ...

White Castle is celebrating National Slider Day by honoring customers with free sandwiches and money-saving deals. According ...

Get ready to slide into a new level of fast-food fashion. White Castle and Heelys have teamed up for an unexpected, playful, and undeniably nostalgic collaboration: the “Slider Riders” collection.

White Castle is continuing its tradition of offering a complimentary original slider to commemorate National Slider Day.