National Cheeseburger Day 2026 — Free & Cheap Burger Deals (Sept 18)
- Value: Free & cheap burger deals
- Free — no purchase necessary
National Cheeseburger Day is Friday, September 18, 2026, and fast-food chains mark it with some of the year's best burger deals — think $0.50 double cheeseburgers, free burgers with a small purchase, and BOGO sliders. Most run through each chain's free app. Here's what to expect and how to grab the deals on September 18.