The trick-or-treating hours can vary depending on the location and community. Generally, trick-or-treating begins around sunset or earlier for the youngest set, while older children, pre-teens, and teens will arrive by 8 p.m. or 9 p.m., or the time stated by local curfew laws. Most trick-or-treaters start their trek at sunset after dinnertime, around 5:30 or 6 p.m., and end their collecting by 9 p.m. . However, some areas may kick off door-to-door trick-or-treating as early as 3:30 p.m., while others may continue activities until 10 p.m. . It is best to check local news outlets for exact trick-or-treating times and any updated guidelines.