White Castle introduced National Slider Day in May 2015 to honor the slider. “The introduction of the Slider in 1921 helped turn White Castle into a household name and launched the fast-food ...

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 ...

White Castle is offering customers a free original slider on Thursday's National Slider Day. Customers can get a free slider from White Castle on Thursday with a downloaded coupon or with ...

White Castle is offering a free Original Slider on May 15th, 2025, in celebration of National Slider Day. Currently, there is only one White Castle location in Florida, in Orlando not far from Disney.