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On September 18, 2026, also known as National Cheeseburger Day, McDonald’s guests can receive a free double cheeseburger with a $1 purchase.

On the 18th, customers can use or download the MyMcDonald’s Rewards app to claim their reward. The only restrictions include making a $1 purchase in the app (excluding tax), and the offer is only valid one time and only on September 18. Fans have to use the app to claim this reward, but thankfully the restaurant chain offers rewards from time to time, so it pays to download it.