Joyeux anniversaire
Joyeux anniversaire is the most common way of saying “Happy Birthday” in French and literally means “Merry Birthday”. It can be used in both formal and informal situations.
Like with “Happy Birthday” in English, you usually add the person name after it.
Example sentence
Joyeux anniversaire mon amour !
Happy Birthday my love!
Je te souhaite un joyeux anniversaire.
I wish you a Happy Birthday.