White Castle celebrates 'National Slider Day' with free sliders

White Castle is celebrating "National Slider Day" with free sliders. (Photo provided by White Castle)

(WTHR) – White Castle is celebrating "National Slider Day" with free sliders for all!

On May 15, White Castle expects to give away tens of thousands of free sliders in nearly 400 restaurants nationwide throughout the day.

To kick off the celebration, sliders fans can receive one free slider and small Coca-Cola Freestyle beverage on May 15 with a coupon posted to White Castle's website here.

Fans can also enjoy $1 cashback through the end of May when they buy two boxes of any four or six count sliders using the Checkout51 app in grocery and convenience stores across the country.

If you're feeling really festive, you can even dress up in your best Western attire for White Castle's “Western Wednesday” and enjoy two free limited-time BBQ Original Sliders with any purchase.