Lafayette Parish has set Halloween trick-or-treating for 6 p.m. to 8 p.m. on Saturday but some individual neighborhoods are moving the date to Friday because of predicted thunderstorms. Parish residents are encouraged to contact their local neighborhood representatives to see when trick-or-treating will be observed. The Youngsville Police Department will provide patrols on both Friday and Saturday nights. Saturday trick-or-treating in the Town of Duson is scheduled from 5:30-7:30 p.m.