Son anniversaire! goes for his birthday and for her birthday!
and if you want to wish someone a happy birthday it is : Joyeux anniversaire!
a birthday is 'un anniversaire' in French
Birthday is "anniversaire" (masc.) in French.
d'anniversaire
A birthday cake in French is 'un gâteau d'anniversaire'
you say mon gorna be mansa
un anniversaire
"Today is my birthday!" in French is "Aujourd'hui est mon anniversaire !"
you say "son anniversaire"
C'est ton anniversaire
Joyeux anniversaire
joyeux anniversaire
C'est mon anniversaire.