It seems like there’s a national holiday for everything these days, with celebrations happening for everything from wine to lipstick. And next on the list? National Cheeseburger Day.

DoorDash x Shake Shack Burger

This week, Shake Shack has been teaming up with DoorDash for #ShackWeek, a week of free Shake Shack delivery. On Tuesday they sweetened the deal by giving away free chocolate milkshakes for — you guessed it — National Chocolate Milkshake Day, and on Monday, September 18, you can snag a free cheeseburger. All you have to do is use promo code “SHACK” when you check out in DoorDash between the hours of 11am and 2pm local time.

Shake Shack Burgers and Fries

If cheeseburgers aren’t your thing (or you don’t want to wait until next week), you can enjoy free delivery on any Shake Shack order you make over $12 via DoorDash until Monday. Participating cities include Atlanta, Austin, Boston, Bridgewater (NJ), Brooklyn, Chicago, Dallas, DC, Houston, LA, Las Vegas, Long Island, Manhattan, Phoenix, Paramus (NJ), Queens, and Scottsdale (AZ).

How will you be celebrating National Cheeseburger Day? Tell us @BritandCo!

(Photos via DoorDash)