Halloween is a holiday celebrated on the night of 31st of October. Though traditionally associated with the spirits of the dead, the modern celebration of Halloween is mainly centered on costumes and candy.
Halloween and Gargoyles
Halloween is a very important holiday for the Manhattan Clan. Because humans in Manhattan celebrate the holiday by dressing up in costumes, the gargoyles can freely walk the streets and interact with humans without causing a panic. Since arriving in Manhattan, the clan has participated in two Halloween celebrations, the first in 1995 and the second in 1996.
Elisa helped the Trio to mail-order their Halloween costumes in early October. The costumes were delivered to Elisa five days before Halloween.  On October 30, while picking up her own Halloween costume, Elisa encountered the werefox for the first time.  On Halloween, Elisa, Goliath, and the Trio attended a Greenwich Village block party. Goliath and Elisa later aided Xanatos in removing the Eye of Odin from Fox, transforming her from the werefox back into her human form. ("Eye of the Beholder")
- Brooklyn - pirate
- Broadway - detective
- Lexington - pilot
- Elisa - Belle from Disney's Beauty and the Beast
Although Goliath attended the block party with Elisa and the Trio, he opted not to wear a costume, and therefore went dressed as himself. Hudson and Bronx stayed home at the clock tower and did not dress up, as far as anyone knows.
By Halloween 1996, the existence of living gargoyles in Manhattan had been revealed. Because of this, gargoyles became the most common costume in that year. Many of the costumes also happened to resemble specific members of the Manhattan Clan, particularly Goliath and Brooklyn, although others were more generic. Due to the popularity of gargoyle costumes, John Castaway ordered the quarrymen to be on the streets on Halloween without hammers, for fear that a quarryman mistakenly assaulting a human in a gargoyle costume would publicly tarnish the quarrymen's reputation.
David Xanatos organised a Halloween masquerade ball at the Eyrie Building on Halloween. He intended for the gargoyles (now back living at Castle Wyvern) to attend, so that they could be introduced to the human guests, who would believe the gargoyles were humans in costumes and would therefore come to appreciate them as individuals before learning the truth. This time Fox obtained costumes for the clan. At the last minute, Xanatos was called away to another party at the White House, and the masque in the Eyrie Building was hosted primarily by Owen Burnett. Hudson and Bronx once again declined to join the festivities, but they did celebrate the holiday with Hudson's friend Jeffrey Robbins. When Billy, Susan, and Terry Chung came to Robbins's house trick-or-treating, Susan complimented Hudson on his mask, which Robbins overheard, prompting Hudson to reveal to Robbins that he is a gargoyle, and Robbins replying by letting him know he had already figured it out.
Though the Xanatos family's guests still believed the gargoyles were just humans wearing one or two costumes, the holiday was largely an unhappy one for the clan. Elisa told Goliath that she thought they should break up and that both of them should start dating other people. Goliath half-heartedly visited the Labyrinth and asked Delilah to attend the Masque with him. Elisa chose Officer Morgan as her date. Thailog later arrived at the castle with the clones in tow, seeking to reclaim Delilah. While they argued over Delilah's fate, Thailog stabbed Goliath. The rest of the clan battled Thailog and the clones, giving Thailog the opportunity to obtain DNA samples from all of them. Delilah arrived and expressed her anger with both Goliath and Thailog for trying to use her for their own purposes. Malibu, Hollywood, and Burbank chose to remain with Delilah, but Brentwood left with Thailog. Despite the unhappy events, the holiday ended on a high note, Elisa and the injured Goliath confessed their love for one another, Hudson learned that he could be honest with his friend Robbins, and both the Manhattan and Labyrinth clans gained a new human ally in Dr. Sato. The only exceptions to the happiness were Brooklyn and Lexington. Brooklyn felt alone surrounded by couples, Goliath and Elisa, Broadway and Angela, and (particularly frustrating for Brooklyn), Delilah and Malibu. Lexington was worried about what Brentwood's decision to leave with Thailog meant about him. ("Invitation Only", "Masque", "Bash")
- Brooklyn - "Super-goyle", a gargoyle in a Superman costume
- Broadway - The Cowardly Lion from The Wizard of Oz (it starts off as simply a mane and nose in "Masque" but becomes a full body suit in "Bash")
- Angela - Dorothy from The Wizard of Oz (complete with a stuffed Cairn terrier in a basket)
- Lexington - cyborg (strongly resembling his "Future Tense" self)
- Elisa - Jasmine from Disney's Aladdin
- Morgan - Sherlock Holmes
- Billy - Jackal
- Susan - Hyena
- Terry Chung - gargoyle (which looks surprisingly like Goliath)
- Brendan - gargoyle
- Margot - flapper
- Dr. Sato - doctor
- Judge Roebling - knight ("Sir Ian of Oxford")
- Alexander Xanatos - gargoyle
Once again, Goliath and Hudson chose to attend their respective functions without wearing costumes, although other guests tended to believe they were wearing very convincing gargoyle costumes. Xanatos and Thailog both wore simple, black domino masks in lieu of full costumes; Fox carried a carnival-style mask on a stick that is the same shape and colour as her fox-head tattoo and which she holds over her right eye. Servers at the masquerade also wore various gargoyle-themed costumes. There were two women in attendance dressed in medieval clothes which made them look identical to Mary and Finella (these two women may have in fact been Mary and Finella).
Real World Background
The name "Halloween" is derived from "All Hallows' Eve", referring to the fact that it fell on the night before All Hallows' Day, or All Saints' Day. It may have evolved from the ancient Gaelic festival of Samhain, during which ancient Gaels would take stock of their crops and livestock in preparation for the coming winter. The Gaels also believed that the spirits of the dead could cross over into the world of the living on this night, causing all kinds of havoc. The Gaels would erect bonfires and burn the bones of their slaughtered livestock to keep evil spirits at bay. They would also don costumes and masks to confuse the spirits. These ancient customs later inspired the modern practice of trick or treating, in which children dress up in costume and go door to door collecting candy from their neighbors.
- Halloween at Wikipedia, the Free Encyclopedia