Coffee lovers united on Tuesday for a day that celebrates the strength of a brew.
According to NationalDayCalendar.com, it's National Coffee Day.
The site said it's celebrated every year on Sept. 29.
At Dunkin' Donuts, customers can get a free medium cup of hot, iced or dark roast coffee.
Krispy Kreme is also offering a freebie in the form of a small coffee and a free original glazed doughnut.
Participating McDonald's are giving out free small coffees.
Cumberland Farms customers can text "FREECOFFEE" to 33733 on their smartphones to receive a coupon for a free coffee.
Panara Bread rewards members have been able to get free coffee throughout the month of September.
At Whole Foods, 12 ounce cups of java are 25 cents throughout September.
Coffee can be traced back to the 15th century. Coffee seeds were first roasted and brewed, similar to what's done today.
Yemen traders brought the coffee back from Ethiopia and cultivated it.
By 1670, seeds were smuggled out of the Middle East and spread to Italy and the rest of Europe. From there, it percolated around the world pretty quickly.
Now, it's enjoyed with cream, sugar, on ice or in baked goods and ice cream.
Fans used the hashtag #NationalCoffeeDay on social media.
For more on the day, click here.
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