1. If you want to say someone was born *during* a specific month:
* "est né(e) en [month]"
* Example: "Elle est née en juin." (She was born in June.)
2. If you want to say someone was born *on a specific day* within a month:
* "est né(e) le [day] [month]"
* Example: "Il est né le 15 juillet." (He was born on July 15th.)
3. If you want to say someone was born *in the month of* a specific year:
* "est né(e) au mois de [month] [year]"
* Example: "Elle est née au mois de décembre 1985." (She was born in December of 1985.)
Important:
* "Né(e)" is the past participle of "naître" (to be born) and changes depending on gender.
* "Au mois de" is used to emphasize the month, while just using "en" can be used for a less formal way of saying it.
Choose the phrase that best fits your specific situation.