Score a free Krispy Kreme doughnut this St. Patrick’s Day — here’s the trick

Krispy Kreme is offering free Green O'riginal Glazed doughnuts on March 16-17. No purchase is required to be eligible. Simply wear green in-store or via the drive-thru to get one free doughnut for each customer. The promotion arrives at a time when, as cited, In addition, 4,000 customers will get a year-long doughnut reward.