I went with "Le Halloween".
In my research, I found reference to an answer to a question that "Noël and Pâques don't have an article in front of them but the Saints days do". Is Halloween like Christmas and Easter (no article), and does this apply to other non-Saint holidays?
Freeform Writing Exercise A1
It is not a question of why but it is just the way things are with some religious festivals like Noël and Pâques which don't have an article.
Please take a look at this lesson about using prepositions with such terms which includes Hanoucca but not Halloween.
Using prepositions with celebration days, like Christmas
Halloween is a pagan American import that is growing in impact in France, I can't think of any others apart from Hanoucca which wouldn't have an article either.
Hope this helps!
Sign in to submit your answer
Don't have an account yet? Join today
Test your French to the CEFR standard