September 16, 2021
To celebrate National Cheeseburger Day, held on Sept. 18, McDonald's will offer a 50-cent double cheeseburger for app users. The one day promotion is available via the MyMcDonald's Rewards program in the app and valid one time on Sept. 18, according to a press release.
After a first purchase in the app, users will receive a bonus 1,500 points.