Dairy Queen is celebrating the unofficial end of summer by giving its customers something for free.

Tuesday afternoon, from 2 p.m. until 5 p.m., customers can get a free Oreo Frappe, the company announced.

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Participating restaurants will give each customer a free small drink to mark the day that ends summer vacation.

The Frappe is a combination of coffee, ice, Oreos and soft-serve ice cream, topped with whipped cream and Oreo pieces, Business Wire reported.

Not all Dairy Queens are participating in the promotion. Click here to find a local Dairy Queen's contact information.