National Burger Day 2021 Deals: Restaurants Offering Freebies, Buy One Get One, $1 Burgers

National Burger Day celebrates one of America's favorite foods, so it is no surprise that restaurants across the country are joining the festivities and offering freebies and deals on burgers this Friday.

Check out these restaurants that are offering great deals and discounts on National Burger Day this Friday, courtesy of USA Today and Delish.

Dog Haus

For those who order from one of its participating locations on National Burger Day, Dog Haus is offering a deal where customers can get its signature Haus Burger for just $5.

Wayback Burgers

Wayback Burgers' Signature Burger will be priced at $3 on National Burger Day if customers order through the Wayback Burgers app. What's more, rewards members will also get triple the points for their purchases.

Red Robin

Members of the food chain's loyalty program can get dibs on Red Robin's buy one, get one 50% off deal on their Gourmet Burgers until the end of May. Customers are also entitled to free burgers and other discounts during their birth month when they sign up for the restaurant's "royalty" program.

Sonic Drive-In

Sonic Drive-In is giving its customers 50% off when they purchase the restaurant's Twisted Texan Cheeseburger, Cheeseburger or Footlong Quarter Pound Coney. Orders must be made through the chain's mobile app or on its site.

Wendy's

On National Burger Day, customers can get a free Dave's Single or Junior Bacon Cheeseburger when they buy from Wendy's mobile app. The famous restaurant also has other special offers and deals when one signs up for its app -- including major discounts on Wendy's premium burgers.

Jack in the Box

Customers can get 20% off on Jack in the Box's mobile app starting Friday and through Memorial Day Monday.

McDonald's

McDonald's is offering deals through its app. Each Friday through June 27, customers can get a free medium fries on mobile orders with a minimum $1 purchase when using an app offer.

Del Taco

Del Taco is having a buy-one-get-one deal on its Double Del Cheeseburgers this Friday -- just make sure to download the mobile app and order there.

Burger King

Not one to miss out on the National Burger Day frenzy, Burger King is giving away a free Whopper with an app offer and a $3 purchase on Friday. For a limited time, the food chain is also having a buy one, get one for $1 deal on its famous Whopper burger, Impossible Whopper and a lot more.

Friendly's

For those who order from Friendly's mobile app or its website at friendlysrestaurants.com, they can also avail themselves of a free medium sundae for every burger purchase if they are a BFF member.