An autumnal holiday-themed social gathering in a specific Northern California city is a type of event. These events often include costumes, decorations, and activities related to the celebration occurring on October 31st. For example, a themed costume contest held at a local venue represents such a gathering.
These events serve several purposes, including fostering community engagement and providing opportunities for social interaction. Historically, such gatherings can be traced back to traditions rooted in harvest festivals and celebrations of the changing seasons. The economic benefits to local businesses from associated spending should also be considered.