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May is National Burger Month, a time to celebrate your favorite patty and bun combo. That could mean beef, turkey, plant-based, or whatever other ingredient the food industry is pushing next (just, please, leave cauliflower out of this). When food “holidays” like National Burger Month roll around, we expect to see free food deals. Coming in hot (literally) today 15 is National Slider Day. (We’ll arrive at National Hamburger Day on May 28.) Every year, White Castle sliders get their moment in the spotlight, with the chain offering a free slider to customers for White Castle free slider day.

Fortunately, this year is no different. White Castle will offer a free cheese slider on May 15, no purchase necessary. Plus, there will be more savings to pick up on National Slider Day, and we have all of that info below.

For more smart shopping tips and savings hacks, text HACKS to 57299.


National Slider Day is May 15, exactly when White Castle free slider day is.

It’s real easy to keep track of National Slider Day. It falls on May 15 each and every year. In 2023, May 15 is a Monday. It makes sense that White Castle is the loudest and proudest on National Slider Day because they created the occasion in 2015. And they’ve celebrated the day every year since.


Show a coupon to get your free White Castle Slider on National Slider Day.

white castle burgers, fries, and drink

In order to get your free cheese White Castle slider (regularly $1.25), you’ll first need to print out or download this coupon and show it to the White Castle cashier when you visit a location in person. Once you do, you’ll be eligible to get your slider for free. No purchase necessary.

This coupon is limited to one slider per person, and you can’t use it on delivery orders or in combination with any other deal or promotion.

Additionally, you’ll be able to get a discount on select sliders when you order through Instacart. These discounts vary depending on your order.

If you’re a member of Craver Nation, White Castle’s loyal program, you can get 20% off mobile orders throughout May. Plus, if you’re new to join, you’ll receive an offer for a free Original Slider Combo Meal just for signing up.


Pick up even more discounts on National Slider Day from Wayback Burger, Red Robin and Krystal.

A table at Red Robin with multiple plates of food, including burgers, fries, broccoli, a tower of onion rings, a milkshake, and several dipping cups.

Throughout the month of May, Red Robin and Wayback Burger are offering deals for their customers to help them save, and National Slider Day is no exception. Plus, Krystal is also rolling out their own National Slider Day deal Here are the other burger deals that you can get on May 15:

  • Krystal: BOGO free sliders when you use the code SLIDERDAY on the Krystal mobile app or online website.
  • Red Robin: Join the Royalty Rewards program to get a BOGO 50% off entrees coupon. This can only be used once between May 1 and May 31. Only available at participating locations.
  • Wayback Burger: Get $3 kids meals (reg. $8.49) with the purchase of an adult entree from May 15 to May 21 — a 35.3% discount.

There are plenty of ways to be Red Robin Royalty and get free burgers by following our tips and tricks.


Get ready for National Hamburger Day on May 28.

a tray with 2 burgers, 2 fries, and 2 drinks being grabbed by two people

National Hamburger Day is only two weeks away from National Slider Day which means picking up even more discounted burgers for the holiday. Here are some of the deals that you can pick up on May 28:

  • Wendy’s: Get a $0.01 Junior Bacon Cheeseburger (reg. $3.39) with any purchase on May 28.
  • Habit Grill: Get two Charburgers, two sides, and two drink for $20 on May 28.

To be updated on all the food deals, text FOOD to 57299 and be the first to know about the hottest food deals each day.

Get a Free White Castle Slider Today On National Slider Day