Mostly. It spun off of the Irish pagan holiday of Samhain. Then it became All Hallows Eve (night before All Saints' Day)->Hallowe'en>Halloween. From what I understand, it has some presence some other part's of English-speaking world.

Mostly. It spun off of the Irish pagan holiday of Samhain. Then it became All Hallows Eve (night before All Saints' Day)->Halowe'en->Halloween. From what I understand, it has some presence some other part's of English-speaking world.