I have noticed in passing that a number of American bloggers claim Halloween is Catholic, and urge it should be defended from Puritans. I presume the "Puritans" are those who try to keep it as a vigil of All Saints, those who say First Vespers of All Saints early and get the local children round to celebrate by dressing up as saints.
When I was a boy, in the Home Counties, Halloween was kept with "apple bobbing" and a couple of ghost stories, now pumpkin lanterns, ghoulish costumes and "trick or treating" has crept in. I know in other parts of the UK the occasional manglewurzel was carved with a leering face but most of the newer customs here seem to be imported from the US.
I am not sure why we bobbed for apples, neither am I sure why dressing up as the Beast from the Black Lagoon should be considered Catholic. I am sure that we need a degree of misrule in our lives from time to time, hence April Fool's Day and ancient customs of fool kings and boy bishops associated with a season of "Misrule" at Christmas or Epiphany, when masters became servants and servants masters. The Church's role here was merely to stop excess. But I can see nothing that is "Catholic" here.
All Saints is obviously about remembering Heaven, All Souls, naturally follows on as we remember those destined for a place amongst the Blessed, but are actually in Purgatory, both have their rites. Halloween, however seems to be an entirely pagan affair, a remembrance of those in Hell, beyond the power of prayer and the Church. The only Christian idea seems to be to remind us of the damned and damnable, those outside of the Life of Grace, like gargoyles on the outside of a Church.