The Dover Days Fair will be held on Sept. 21 from 9 a.m. to 4 p.m. on the town common. The fair, an annual tradition for approximately 30 years, serves as a fund-raiser for many local organizations. New this year, the fair will be open to arts and crafts and business vendors from outside of town. All of the vendors are approved by the town’s Parks and Recreation Department. This year’s fair will feature rides, games, a variety of children’s activities, and food and drinks including lobster rolls, hamburgers, ice cream, and cotton candy. Plants, gift baskets, jams, and various other specialties will also be sold. Full story for BostonGlobe.com subscribers.