During the holiday season, Calendar Holdings (aka Calendar Club) transforms empty retail space into shops under the banners Go! Calendar, Go! Games, and Go! Toys. The company's temporary stores range in size from kiosks to some 6,000 sq. ft. Founded in 1993 with about 60 stores, Calendar Club now operates more than 1,200 locations in the US. The company also sells merchandise year-round on its websites, including Calendars.com and DogBreedStore.com. Bookseller Barnes & Noble sold its majority stake in Calendar Club to CEO Marc Winkelman and the firm's management in 2009 for $7 million.