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*Offer only valid for qualifying orders placed at a kiosk in-Shack, or for delivery or pick-up via the Shake Shack Mobile App or shakeshack.com, and fulfilled during the Promotional Dates (as defined below) starting on Wednesday, October 1st 2025 through Friday, October 31st 2025 ("Promotional Period"), containing the specified promotional sandwich of that day ("Promotional Sandwich") (see Blog Post for the official list of Promotional Sandwiches and the dates they will be offered ("Promotional Dates")), at participating US Shake Shack locations (excluding airports, stadiums, arenas, travel plazas, and museums). Offer not valid for drive-thru orders or orders made through third-party delivery apps. Limit one (1) free Promotional Sandwich per order. Max savings equal to the price of the Promotional Sandwich (from $9.99 - $11.49). Offer excludes the cost of the Promotional Sandwich, gift card purchases and any applicable taxes, delivery fees or other fees. Must add a combination of at least two (2) of the Promotional Sandwiches to cart prior to checkout. Offer excludes all paid add-ons such as avocado and bacon. While supplies last. Cannot be combined with any other offers or promotions. Must use promotional code 'SPOOKY' at checkout. Code is case sensitive. Offer code will only work in all caps.