Similar to the Dunkin' Donuts deal, the donut is only free with any purchase (Krispy Kreme will be offering a free donut with no purchase necessary).
The free donut offer makes the fifth year that Tim Hortons has participated in National Donut Day celebrations.
National Donut Day first came about as a fundraiser to benefit those in need by the Salvation Army. It honors women volunteers who served donuts to soldiers during World War I.
