The phrase identifies occurrences within a specific geographic area, San Diego, during the annual autumnal celebration on October 31st. These occurrences can range from family-friendly gatherings like pumpkin patches and costume parades to adult-oriented parties and haunted attractions. A typical example includes a neighborhood trick-or-treating event in a residential area of San Diego during that specific holiday.
Such activities contribute significantly to the local economy by boosting tourism, supporting local businesses, and creating seasonal employment opportunities. Historically, the celebration has evolved from traditional harvest festivals and religious observances to a contemporary secular holiday marked by costumes, decorations, and themed entertainment. This evolution has broadened its appeal and economic impact.