The Hopkinton PolyArts festival returns to the Town Common this year on Sept. 18 from 10 a.m.-4 p.m. The event, established in 1974, features regional artisans, crafters and local nonprofits. Now a subcommittee of the Hopkinton Cultural Council, it is managed by a small committee of volunteers. For more information, check the PolyArts-Hopkinton page on Facebook.