Coffee fans across the country will be celebrating on Saturday, September 29, when National Coffee Day takes place. Dunkin’ Donuts is getting in on the action with a special offer to customers.

On that day, any guest that purchases a Hot Coffee at participating Dunkin’ Donuts locations nationwide will get one Hot Coffee free. This including a variety of choices such as the signature Original Blend, Dark Roast and Dunkin’ Decaf. They can even be personalized with flavors like French Vanilla, Caramel, Mocha, or Hazelnut.

“National Coffee Day is a chance for Dunkin’ to show appreciation for busy coffee fans by making it easy to recharge and reconnect with the people they run with, each and every day,” says Tony Weisman, Chief Marketing Officer of Dunkin’ Donuts U.S. “With a second cup of Dunkin’ Hot Coffee on us, we encourage our guests to take this opportunity to treat a friend or family member to catch up over a cup of coffee on National Coffee Day.”

Seasonal selections have recently joined the coffee menu at Dunkin’ Donuts. This includes the classic Pumpkin-flavored coffee and the new Maple Pecan-flavored coffee.