National Doughnut Day or National Donut Day is celebrated in the United States and some other countries on the first Friday of June annually. This year, National Doughnut Day 2021 will fall on June 4. And to add sprinkles to your regular life, here is a bunch of a-dough-rable quotes that are jam-packed with goodness. Wish you all a very Happy National Doughnut Day 2021.