From a Greenfield Recreation Department press release:
Downtown Greenfield will once again be filled with ghosts and goblins on Wednesday, October 31st as the Greenfield Recreation Department and Greenfield Business Association host our Annual Downtown Trick or Treat. Downtown Trick or Treat will run from 4:00pm-5:30pm, and our partners WHAI, DJ Bobby C., and GCTV will be broadcasting at the event!