Halloween in French is typically capitalized as Halloween and treated as a feminine noun. In France, many style guides prefer using Halloween without a preceding determiner (C’est Halloween!). In Quebec and some other Francophone regions, it’s common to say l’Halloween with the definite article. The word itself comes from All Hallows’ Eve, and some sources note historical variants like Hallowe’en. When you greet or reference the holiday in French, you can say:

• Joyeuse Halloween (common in some contexts, though less formal)
• Joyeuse fête d’Halloween (more explicit)
• C’est Halloween! or C’est l’Halloween! (depending on regional usage)

Notes for correctness:

• Always capitalize Halloween when used as the name of the holiday.
• In French, the initial h is often silent in pronunciation, but this does not affect capitalization or spelling.
• The use of a determiner varies by region: France tends toward no determiner in many standard contexts, while Quebec often uses l’Halloween.