Happy Friday in German is glücklicher Freitag
Happy Thursday = Glücklicher Donnerstag
You can't say Happy Friday in Hebrew, but a common greeting on Friday afternoons is Shabbat Shalom (שבת שלום).
To say "Happy Friday" in Hawaiian, you would say "Hauʻoli Pōʻakahi," which translates to "Happy Friday."
Assuming you mean "how" to say happy in German, there are a couple of different ways: Froh and gluecklich.
hadre fridia
You do not say "Happy Good Friday" in greek.... you actually say "Good Resurrection" which is "Kali Anastasi"
"What are you doing this Friday night?" = "Was machst du Freitagabend?"
sexta-feira feliz
heureux, c'est vendredi !
happy - glücklich Also fröhlich, froh
Viernes noche feliz
I am not a happy puppy is an English idiom and cannot be translated into German in a way that conveys it's meaning.
happy married life = glückliches Eheleben