In celebration of National Slider Day, White Castle is offering fans a free Slider at participating locations nationwide on May 15, 2020.
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To take advantage of the offer, simply stop by the drive-thru at any participating location on Friday, May 15, and show or print this coupon for a free Slider with no purchase necessary, while supplies last.
The offer is valid on just about any Slider on the menu with the exception of Double Sliders and the 1921 Slider.
White Castle’s free National Slider Day promotion is valid at participating locations nationwide for one day only on Friday, May 15, 2020 – while supplies last.
Image – White Castle