For guidelines on trick or treating from the mayor and police chief, check out this article.
2. Thayer Public Library hosts the Teen Afterschool Drawing Group from 3:30 p.m. to 4:30 p.m. in the Young Adult Room.
"Love to draw? Want to meet other teen artists and work on your skills? Come to the library afterschool and bring your sketchbook. We’ll have plenty of art supplies available to help you create a new art project, or just hang out, draw, and spend time with friends in a relaxed atmosphere.
"This is a drop-in program and participants may come to one or all of the meetings. We meet in the Young Adult Room on the library's lower level. No registration required. For teens 12-17 only."
3. The Tri Town Board of Water Commissioners meets at 10 a.m. in the upstairs Johnson Chambers at Town Hall.
4. Check out Braintree's Halloween weather forecast.
5. Born on this day in history: poet John Keats (1795), journalist Dan Rather (1931), comedian John Candy (1950), Lord of the Rings director Peter Jackson (1961), actor Rob Schneider (1963) and rapper Vanilla Ice (1967).