Halloween, a contraction of All Hallows' Eve, is a celebration observed on 31 October, the day before the feast of All Hallows'. The celebrations and observances of this day occur primarily in regions of the Western world, although some traditions vary significantly between geographical areas.
Halloween, also spelled as Hallowe'en or Allhallowe'en, is a contraction of All Hallows' Eve, the eve or vigil before the Western Christian feast of All Hallows (or All Saints) which is observed on 1 November. This day begins the triduum of Hallowtide, which cumulates with All Souls' Day. In the Middle Ages, many Christians held a folk belief that All Hallows' Eve was the "night where the veil between the material world and the afterlife was at its most transparent."
The Chinese celebrate the "Hungry Ghost Festival" in mid-July, when it is customary to float river lanterns to remember those who have died. By contrast, Halloween is often (erroneously) called "All Saints' Day" (Wànshèngjié, 萬聖節), or (less commonly, but more correctly) "All Saints' Eve" (Wànshèngyè, 萬聖夜) or "Eve of All Saints' Day" (Wànshèngjié Qiányè, 萬聖節前夕). Chinese Christian churches hold religious celebrations. Non-religious celebrations are dominated by expatriate Americans or Canadians, but costume parties are also popular for Chinese young adults, especially in large cities. Hong Kong Disneyland and Ocean Park (Halloween Bash) host annual Halloween shows.
Traditional "door-to-door" trick or treating is not commonly practiced in Hong Kong due to the vast majority of Hong Kong residents living in high-rise apartment blocks. However, in many buildings catering to expatriates, Halloween parties and limited trick or treating is arranged by the management. Instances of street-level trick or treating in Hong Kong occur in ultra-exclusive gated housing communities such as The Beverly Hills populated by Hong Kong's super-rich and in expatriate areas like Discovery Bay and the Red Hill Peninsula. For the general public, there are events at Tsim Sha Tsui's Avenue of the Stars that try to mimic the celebration. In the Lan Kwai Fong area of Hong Kong, known as a major entertainment district for the international community, a Halloween celebration and parade has taken place for over 20 years, with many people dressing in costume and making their way around the streets to various drinking establishments. Many international schools also celebrate Halloween with costumes, and some put an academic twist on the celebrations such as the "Book-o-ween" celebrations at Hong Kong International School where students dress as favorite literary characters.