Customers will be able to download a digital coupon or enter a code on the company app to receive the free slider.

You should know that May 15 is officially National Slider Day, and White Castle is celebrating this special occasion by ...

White Castle introduced National Slider Day in 2015 to honor its original steamed slider with onions. Introduced more than ...

Free slider White Castle will celebrate National Slider Day Friday, May 15, by giving customers a free original slider, no ...

You can get a free burger this week. 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 fast‑food chain is marking National Slider Day with a no‑purchase‑required giveaway. Here’s how to claim one.

White Castle created the original slider, and it created National Slider Day to celebrate them. You can get one for free May ...

White Castle is celebrating National Slider Day by honoring customers with free sandwiches and money-saving deals. According to a press release, the original fast-food retailer will give away one ...