Where does the name Halloween originate from?
Halloween comes from All Hallow Even, the eve (night before) All Hallows day. Therefore, Halloween is the eve of All Saints Day.
the word Halloween or the date 31 October are mentioned in any Anglo-Saxon text indicating that it was just an ordinary day a thousand years ago.
From the Medieval period (1066 - 1485) through to the 19th century, there is no evidence that 31 October was anything else other than the eve of All Saints Day.
From the 19th Century to the present day, 31st October has increasingly acquired a reputation as a night on which ghost, witches, and fairies, are especially active.