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

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

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

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Smalls Sliders has announced the return of its National Slider Day promotion to honor each location’s Smalls Rewards loyalty members. Slidin’ thru Smalls Sliders Cans on May 15, the brand’s loyalty ...

Want a free burger? Today's the day to head to White Castle. You can get a free Original Slider at White Castle on May 15 to celebrate National Slider Day. No purchase is required. The burger ...

White Castle, America's first fast-food hamburger restaurant and home to The Original Slider®, is recognizing National Slider ...

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

"We think a burger that has had so much influence in the food industry is worthy of its own special day, and what better way to celebrate than to thank our customers with a complimentary Slider." ...