Say cheese! National Cheeseburger Day is on Sunday, Sept. 18, and fast food restaurants are heating up ~all~ the grills for the occasion. From free burgers at McDonald’s to $2 burgers from 7-Eleven, here are seven tasty deals to dig into.

McDonald's

The iconic golden arches are stacking it up with a free Double Cheeseburger with any $1 purchase on the McDonald’s App on Sept. 18. I think I’ll get fries to go with mine.

Burger King

Get the royal treatment at Burger King with Royal Perks on Sept. 18. Members get a free cheeseburger with any $1 purchase on the BK app or online.

Dairy Queen

DQ is whipping up stacks on stacks of Stackburgers for National Cheeseburger Day on Sept. 18. Get $1 off when you order a Signature Stackburger on the DQ App.

7-Eleven

Cheeseburgers taste better when they’re only $2 at 7-Eleven, Speedway, and Stripes for 7Rewards and Speedy Rewards members. It’s only good on Sept. 18, so snap up your burger while you can.

Carl’s Jr. & Hardee’s

This duo is doubling the deals on Sept. 18. New reward members of Carl’s Jr. or Hardee’s get a free Famous Star or Western Bacon Cheeseburger with any purchase in-app. All members can cash in on a BOGO $1 Famous Star in-app.

Wendy’s

It’s National Cheeseburger Week at Wendy’s where you can get a free Dave’s Single burger with any in-app purchase through Sept. 21.

Applebee’s

Feast at Applebee’s on Sept. 18, where the National Cheeseburger Day meal is a Burger Bundle with a handcrafted burger, classic fries, and a fountain drink — all for $10.99 on the Applebee’s app or website.