Halloween Trick or Treating Hours & Ages | City of Williamsburg HOURS: 6 to 8 p.m. Oct. 31 for children ages 12 and under Families who choose to trick-or-treat are asked to do so from 6 to 8 p.m. Oct. 31 for children ages 12 and under. Households that do not want to participate should … Continue reading Halloween Trick or Treating Hours & Ages | City of Williamsburg