(SavorNation) – We’ve been known to “go nuts for doughnuts” even when we have to pay full price. So just imagine how bonkers we’ll go on Friday when doughnut chains throughout the country are offering extra sweet deals.

In honor of National Doughnut Day on June 6, doughnut shops and convenience stores across the country are offering free treats with qualifying purchases — or in some cases, no purchase at all. A few of the Doughnut Day promotions also extend past June 6, offering special discounts on doughy delights well into the month.

Ready to go absolutely loony over some doughnuts? Check out the deals below.

Duck Donuts

Duck Donuts is giving away free cinnamon sugar doughnuts on Friday, no purchase necessary. (One per customer, valid in-store only.) The shops are also offering special $6 pricing on six cinnamon sugar doughnuts.

Dunkin’

Participating Dunkin’ locations are celebrating National Doughnut Day by giving away a classic doughnut with any beverage purchase. The company is also launching a collection with apparel brand Stoney Clover Lane, which includes doughnut-themed bags, charms and pouches, to be available for purchase online starting Friday at 10 a.m. EST.

Honey Dew Donuts

Every location of Honey Dew Donuts will be offering customers a free doughnut with the purchase of any medium beverage on June 6.

Krispy Kreme

Fans of Krispy Kreme can visit participating locations on June 6 for a free Original Glazed, no purchase necessary. (Valid for in-store or drive-thru guests only.) Customers can also purchase a dozen for just $2 with the purchase of any other dozen doughnuts. And every day afterward through June 20, participating Krispy Kreme shops are also offering special $9.99 pricing on a dozen Original Glazed doughnuts.

Kum & Go and Maverik

Kum & Go, as well as its sister store Maverik, are offering half-price doughnuts for all rewards members on Friday. Customers who belong to the Nitro card program (i.e., connect their bank accounts to a Nitro rewards card for gas discounts) can get a free doughnut, no purchase necessary.

Sheetz

In honor of National Doughnut Day, Sheetz locations are offering a free doughnut with the purchase of any beverage (coffee, fountain drink or bottled drink) on June 6-10. The offer is valid for any available doughnut, but customers wishing to redeem the deal must add the promotion to their Sheetz app by finding it under the OFFERZ tab.

Shipley Do-Nuts

Guests who make any purchase at Shipley Do-Nuts through the Shipley loyalty app can also get a free glazed doughnut by entering the discount code DonutMonth25. The deal is also valid every other Friday in June as long as customers purchase their orders in the app and use the same loyalty code.

Tim Hortons

Tim Hortons locations in the U.S. are celebrating National Doughnut Day now through June 8 with their “Buy a Beverage and Get a Donut” offer. Customers must first download the Tim Hortons app and activate the offer, then make a digital or in-store purchase. (Customers making purchases in-store must scan their app at checkout.)

Voodoo Doughnut

Voodoo Doughnut outposts across the nation are selling a dozen Pink Raised Glazed doughnuts for only $10 on Friday. Those who order in-store will also be treated to an additional doughnut of their choosing — for free — with the purchase of a dozen Pink Raised Glazed doughnuts.