This is possible because language is not the only symbolic means of communication. In order to prove that chimpanzees and gorillas are capable of language, and not simply a different kind of symbolic communication system, they must learn a sign language with the basic characteristics of human language.
Definition of Halloween. : October 31 observed especially with dressing up in disguise, trick-or-treating, and displaying jack-o'-lanterns during the evening.
Agoraphobia is the only phobia regularly treated as a medical condition. Note: If you are going to do a search, some common Samhainophobia search terms include Samhainophobia, Halloween fear, Halloween phobia, fear of Halloween, phobia of Halloween.