How do you say prom night in french?

There isn't a single, perfect translation for "prom night" in French. It depends on the context and the specific nuance you want to convey. Here are a few options:

Formal:

* Le bal de fin d'année: This literally translates to "the end-of-year ball" and is the most accurate and common term for prom.

Informal:

* Le bal de promo: This literally translates to "the promotion ball" and is a more casual way to refer to prom.

* La soirée de bal: This means "the prom night" and is a more direct translation of the English phrase.

* Le bal de fin d'études: This literally means "the graduation ball" and is specifically used for the prom that takes place at the end of high school.

You could also use a more descriptive phrase, such as:

* La soirée de danse de fin d'année: This means "the end-of-year dance party" and emphasizes the dancing aspect of prom.

Ultimately, the best way to say "prom night" in French depends on the situation and your preferred level of formality.