The green donuts will be available at participating stores starting Friday, March 15 and running through Sunday, March 17, 2019.
During the period that the green donuts are available, the chain will also be giving randomly selected customers a "Golden Dozen Pass"--each good for one dozen donuts each month for a year. They'll be giving away close to 4000 passes total over that weekend at participating locations.
Photo via Krispy Kreme.