[Ragnarok]

Originally posted by Hadrian Tyrael S. Aventine:
If I recall right, the name halloween for the day came from when the church tried to rename the holiday into "all saints day" which was on Nov 1st (the celtic new year if I recall) and over time Oct 31st was given a name similar to new years eve, that was shortened to halloween over the Last few centuries and nov 1st faded away.

If you want I think I can find information on exactly how All Saints Day and Halloween are tied together. If you want that is. If not I won't bother getting it, I know where it is cause I saw it when I looked up information on halloween.