passe une bonne journée ! (there is no difference when addressing a boy...)
"Good girl" in French is "brave fille" or "gentille fille".
To say "have a good day" in French, you can say "bonne journée."
today was a good day in french
You can say "j'ai passé une bonne journée" in French to express "I had a good day".
In Cajun French, you can say "Passe une bonne journée" which translates to "Have a good day."
bonne journee
"Bonjour mademoiselle" IS a French phrase. If you say this, you are speaking French. It means "Good day, miss" in English.
vous êtes une bonne fille
The French don't have a phrase to express that amorphous sentiment. Their basic salutation, bon jour, already means good day.
My in French is 'Ma' if you were a girl.
Girl in french is fille
Je suis paressuex, and if you're trying to impress her, bring a french-english dictionary...Good luck!