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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White Castle customers can get one free Original Slider in honor of National Slider Day. Hand-out Photo by White Castle White Castle is celebrating its Original Slider with a one-day giveaway.

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 offering a complimentary original slider on May 15 to commemorate National Slider Day. The restaurant chain, known for its mini hamburgers, started the giveaway celebration in 2015 ...

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 ...