BOSTON (CBS) – Thursday, Nov. 3 is National Sandwich Day across America.

To celebrate, Subway is offering a buy-one-get-one-free deal that also supports a good cause. The sandwich chain says anyone who buys a sub and drink on Thursday will get a free sub of equal or lesser price.

READ MORE: Massachusetts Reports 41 New COVID Cases, 5 Additional Deaths

In addition, Subway will donate a meal to the nonprofit Feeding America, which supports food pantries and soup kitchens.

READ MORE: 'Devastating': 1-Year-Old Angelo Nicoloro Drowned During Wrentham Father's Day Celebration

Phantom Gourmet: Great 8 Sandwiches

So far, more than 50,000 people on Facebook have expressed interest in participating.

No other major chains appear to be offering deals specifically for National Sandwich Day, but has compiled a list of ways to avoid paying full price for a sandwich at 17 restaurants.

MORE NEWS: Rep. Jim McGovern: Republicans Who Voted Against Gold Medals For Police Protecting Capitol During Riots Are 'Cowards'

Thursday is said to be the birthday of John Montagu, the fourth Earl of Sandwich who is credited with inventing the meal.