From burgers to BLTs and footlongs to Kaiser rolls, no matter how it's sliced, Tuesday we celebrate the sandwich.

National Sandwich Day highlights the nearly 250-year-old tradition of stacking meat, veggies and cheese between a couple slices of bread then devouring.

The invention is credited to John Montagu, the Earl of Sandwich, in the 1700s in England.

In honor of the hunger-satisfying creation, here are some ways to score free or cheap sandwiches:

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Subway: Almost instinctively the sandwich chain thought to offer a buy one get one deal on footlongs, provided a 30 ounce drink is also purchased.

Arby’s: Get a

.

McDonald's: Download

and get a free sandwich.

Capriotti’s:

for the chance to win free subs for a year.

Jersey Mike’s

.

And at least some

are offering free chicken sandwiches for a limited time during the day.

For those who wear their sandwich pride on a T-shirt,

‏is offering 25 percent orders using the code KingOfMeals.

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UPS driver Dan Partyka delivers an overnight package. As more people buy more goods online, the rapid and unrelenting expansion of e-commerce is causing real challenges for the Sandy-Springs based company. (Bob Andres/AJC 2022)

Credit: TNS