Halloween Block Party & Pet Spooktacular

Sat · Oct 31·9 AM – 1 PM·Union Square Plaza, 66-70 Union Square, Somerville, MA 02143

Union Square Farmers Market (Union Square Plaza) — 60+ local producers sell fruits, vegetables, bread, jams, hot sauce, pickles, ready‑to‑eat foods, with SNAP matches available.

Sat · Oct 31·10 AM – 11 AM·West Branch Children's Room (2nd floor), West Branch, 40 College Ave, Somerville, MA, 02144

Costume parade through the West Branch library, desk trick‑or‑treat stops, then Halloween craft in the Children’s Room, ages 3–12.

Sat · Oct 31·10 AM – 12 PM·75 Union Square, Somerville

Volunteer to plant hundreds of bulbs in Union Square planters, with safety vests, gloves, and bulbs supplied; bring trowel, clothing, sun protection, water, and snacks.

Sat · Oct 31·10 AM – 12 PM·Auditorium, Central Library, 79 Highland Ave, Somerville, MA, 02143

Free 12‑week U.S. citizenship preparation class covering the new 128 civics questions, reading, writing, and interview practice at the Central Library auditorium, Somerville — ages 18 and up.

Thu · Oct 29·5 PM · 7 PM·Somerville

Truck O’ Treat at City Hall — Somerville’s annual spooky‑season truck event for ghouls and goblins.

Sat · Nov 7·12 PM – 11:59 PM·Bow Market, 1 Bow Market Way, Somerville, Massachusetts, 02143

Bow Market hosts a free full‑day Renaissance Faire with performances, vendors, photo opportunities, and a concluding dance party at Remnant Brewing in the Enchanted Forest.

Thu · Oct 29·5 PM – 9 PM·Artists For Humanity, 100 W 2nd St, Boston

Comeback Kid: The Creative Journey of Rashad Nelson presented at Artists For Humanity, 100 W 2nd St, Boston.

Thu · Oct 29·7 PM – 11 PM·191 Highland Ave, Somerville

The Rocky Horror Picture Show at the Armory, 191 Highland Ave, Somerville.

Thu · Oct 29·8 PM·351 Summer St, Somerville

PMRP Presents: “Tomes of Terror: Sounds of Fear” at Dilboy VFW, Somerville, pay‑what‑you‑wish.