Gatherings occurring on or around October 31st within the geographical confines of Philadelphia, these events typically involve costumes, themed decorations, and social interaction. Attendance may range from small private affairs to large-scale public celebrations. For example, a costume contest held at a local bar in Philadelphia during the Halloween season would qualify.
The prevalence of these seasonal celebrations fosters community engagement and provides economic stimulus to local businesses, including costume shops, event venues, and catering services. Historically, such festivities reflect a cultural tradition dating back centuries, evolving from ancient harvest festivals and religious observances.