In celebration of National Donut Day, Tim Hortons Cafe & Bake Shop is offering its US Facebook fans and those who newly "like" its US Facebook page a free donut with any purchase coupon valid on June 7—National Donut Day.

This is the fourth year the bakery cafe chain has participated in National Donut Day celebrations with an online coupon.

"National Donut Day is a holiday we like to celebrate big. It commemorates one of our core products," says Mike Meilleur, executive vice president, Tim Hortons US. "The Facebook coupon is our way to reward our loyal guests and introduce new fans to the brand."

The first Tim Hortons restaurants offered only two products—coffee and donuts. The selection of donuts to enjoy was highlighted by two original Tim Hortons creations, the Apple Fritter and the Dutchie. Still known and loved today for its wide variety of trademark donuts and bite-sized Timbits, the chain's bestselling donut in the US is the Boston Cream.

The National Donut Day coupon is now available at, but is only valid on Friday, June 7.

National Donut Day is celebrated across the United States on the first Friday in June. The annual event originated in 1938 as a Great Depression fundraiser by the Chicago Salvation Army to honor women who served donuts to soldiers in World War I.