Several fast-food chains are offering National Hamburger Day 2026 promotions on Thursday, May 28, with some deals extending through May 30 or May 31. Shake Shack provides a free classic ShackBurger with any purchase over $10, redeemable via the Shack app, online, or in store, and runs a contest awarding two winners a $2,000 gift card for a year of free burgers. Burger King offers Royal Perks members a free hamburger in participating stores with purchases over $3. Jack in the Box sells $1 hamburgers after 2 p.m., limited to five per order. Del Taco gives a free Double Del Cheeseburger with the purchase of another through May 30. Whataburger offers rewards members a free hamburger with a medium fries and drink, plus a chance to win free Whataburger for a year. Hard Rock Cafe runs a BOGO deal on May 28 and gives loyalty members a free hamburger. Sonic Rewards offers free items with at least $3 spend, and Red Robin offers a Big Yummm deal for $9.99 with bottomless sides and beverage.
"For those who like Shake Shack, the New York-based chain will offer a free classic ShackBurger with any purchase above $10. Customers can grab their free burger via the Shack app, online, or in store. The restaurant chain is also running a contest through May 31 with two winners getting what's billed as a year of free burgers. (The prize takes the form of a $2,000 gift card.)"
"Burger King is giving members of its Royal Perks program the special treatment, giving away a free hamburger in participating stores with any purchase over $3. Jack in the Box fans can also score a deal, with the chain offering $1 hamburgers in store and online. The catch? The offer is valid only after 2 p.m., with a limit of five hamburgers per order."
"Despite having tacos in its name, Del Taco is also celebrating the burger day, offering a free Double Del Cheeseburger on the purchase of another, with the offer valid through May 30. Whataburger On Thursday, the Whataburger chain is offering rewards members free hamburgers if you order a medium fries and drink. More than that, it's also offering the chance to win free Whataburger for a year."
"At Hard Rock Cafe locations nationwide, a similar buy-one-get-one-free (BOGO) deal will be offered on May 28, while Hard Rock global loyalty program members will get a free hamburger during the day. Sonic Sonic Rewards loyalty members who spend at least $3 may get a Sonic Smasher, an All-American Smasher, or a medium drink for free. Red Robin is offering a Big Yummm deal that includes bottomless side and beverage for $9.99."
Read at Fast Company
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