Duck Donuts has announced an easy way for fans to earn a free treat in celebration of National Donut Day. All registered Duck Donuts Rewards members will receive a free cinnamon sugar donut offer, redeemable June 5-7, in-store, online, through the app or for delivery.

In order to receive the free cinnamon sugar donut, guests must download and register on the Duck Donuts Rewards app before Thursday, June 4 at 11:59 p.m. PST.

“As our favorite holiday of the year approaches, our stores nationwide stand ready to Sprinkle Happiness and celebrate National Donut Day with those throughout their community,” says Russ DiGilio, founder and chief executive officer of Duck Donuts. “We want everyone to have a chance to celebrate with us, so this year, we are giving our loyal guests three days to redeem their free cinnamon sugar donut. You could even call it National Donut Weekend.”

Duck Donuts is also introducing a limited-time National Donut Day Assortment for guests to experience its most popular toppings and iconic flavors. The box includes flavors such as French Toast, Blueberry, Strawberry Confetti and Cookies & Cream.