Who: Krispy Kreme Doughnuts.
What: When you show up at a Krispy Kreme location dressed in a Halloween costume, you'll receive one free doughnut. This includes the doughnut chain's new Ghostbuster designs. Make sure to jot the date down and put some effort into your costume. Don't just pass a witch hat around your group of friends to get free doughnuts. It's Halloween.
Where: Krispy Kreme's Halloween promotion will be available at all participating Krispy Kreme United States and Canada locations.
When: The deal begins and ends on Friday, Oct. 31.