halloween was imported into this country by a costume shop in 1997. this is common knowledge and the shop itself is very proud of this fact. because of this it is an explicitly consumerist holiday, and it is younger than me by a good margin. i do not know anyone who celebrates.
sweden.
and I went back to check, it was imported by a costume shop in collaboration with hard rock cafe in the early 90s but the decision from the board of business to encourage people to spend for this holiday came in 97.