In the culinary calendar, few moveable feasts are more high and holy than National Donut Day, and to celebrate, Dunkin’ Donuts said that participating restaurants nationwide will offer customers a free donut of their choice with the purchase of any beverage.

National Donut Day is celebrated on the first Friday of June each year, Canton-based Dunkin’ noted. And that means Dunkin’s National Donut Day special offer is scheduled for tomorrow --- at least for as long as supplies last.

Presumably, the supplies should last a while. According to the chain, it sells boat-loads of donuts and Munchkins donut holes every day.

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