May is National Burger Month. White Castle Free Slider Day is right in the middle on May 15, followed by National Burger Day on May 28. When food holidays like these roll around, we expect to see free food deals. And every year, White Castle takes the spotlight by offering a free slider to customers for White Castle Free Slider Day (also known as National Slider Day).
Here's what you can expect for National Slider Day in 2027.
Offers, prices, savings, and local participation may vary.
National Slider Day is an annual 1-day event with free and cheap sliders.
Although fast-food chain White Castle started National Slider Day back in 2015 as a way to honor its signature menu item, other restaurants have joined in to celebrate the miniature hamburgers with free or discounted sliders. Most reliably, White Castle gives out a free slider with a coupon.
The next National Slider Day will take place on Saturday, May 15, 2027.
Fast-food slider giant White Castle started National Slider Day (and arguably, the slider itself) in 2015. So every year, regardless of the day of the week, National Slider Day is on May 15. Next year, you can celebrate with cheap or free sliders on Saturday, May 15, 2027.
Predicted National Slider Day Deals 2027
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Smalls Sliders: Frequent Sliders Rewards members will likely get a free slider with purchase at Smalls Sliders on National Slider Day 2027. Plus, you can expect an Instagram giveaway for a free year's worth of sliders.
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White Castle: In 2027, score a free Original slider (no purchase necessary) from White Castle when you use a promo code during online or in-app checkout.
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