Overview
- Major chains rolled out National Cheeseburger Day promotions on Sept. 18, with McDonald’s offering a free Double Cheeseburger after a $1 in‑app purchase.
- Burger King’s Royal Perks program is running a multi-day sequence that included a free bacon cheeseburger with a $3+ purchase on Sept. 18.
- Smashburger sold single Smashburgers for $1 to loyalty members and Buffalo Wild Wings ran a buy-one-get-one-free cheeseburger deal at participating locations.
- Delivery app Grubhub promoted partner deals and waived delivery/service fees on high-value orders while other platforms and chains layered their own app-only incentives.
- Most offers require loyalty or app redemption, vary by location and franchise, and reflect a broader trend of brands using the unofficial Sept. 18 holiday as a recurring marketing event.