The correct way to say Happy Birthday to someone who speaks European Portuguese is as follows. Say "Feliz aniversario." That means Happy Birthday in Portuguese.
You say "feliz".
"Feliz dia da mãe."
"Happy Anniversary" in Portuguese is "Feliz Aniversario", the same as in Spanish.
You can say "Feliz aniversário de casamento" in Portuguese to mean happy wedding anniversary.
"Parabéns a você" is how one would say "Happy birthday to you" in Portuguese.
You can say "Estou muito feliz" in Brazilian Portuguese.
Feliz.
Feliz Aniversário!
Felizes Férias.
Felizes Férias.
"feliz aniversário"