(Feliz) cumpleaños a ti.
*It depends upon who the person is. If it's, say, your boss or teacher, you might say:
(Feliz) cumpleaños a usted. (Which is more formal)
Nontheless, in Spanish it's not very common to say: "Feliz cumpleaños a ti / a usted / a vosostros / a vos". We simply say:
"Feliz cumpleaños"
"Que se la / lo pase feliz / bien"
"Que se la / lo pasen feliz / bien"
"Que te la / lo pases feliz / bien"
"Que os lo / la paséis feliz / bien"
"Mi cumpleaños". That is how you say "my birthday".
"when is my birthday" translates to "cuando es mi cumpleaños" in Spanish.
cumpleanos
cumpleanos
Mi cumpleaños es (your birthday)
it's his birthday - "es su cumpleanos"
Cuando(when) es(its) tu(your) cumpleaños(birthday).
regalos
feliz cumpleaños
You can say "birthday party" by using the word "fiesta de cumpleaños" in Spanish.
felis cupliano's is happy birthday
Well in Spanish they say Felix complianos