It's as odd in Japanese as it sounds in English. General expression for congratulating in Japanese is omedetou goazimasu, or omedetou alone. Japanese for Friday is kin'youbi. Slapping them together would result in:
"Kin'youbi omedetou gozaimasu" in which, in casual form 'gozaimasu' is not mentioned.
If you are saying "I am happy," you would use ureshii, or if you are saying happiness, you would say "shiawase"
Viernes noche feliz
You may say 'ureshii.'
Yukai Fi-to
In Japanese, they use the expression 'Merry Christmas,' which becomes 'merii kurisumasu' in Japanese.
Happy Friday = Hau'oli Pō.ʻalima [how'ohlee po-ah-lee-ma]
Happy Friday in German is glücklicher Freitag
You can't say Happy Friday in Hebrew, but a common greeting on Friday afternoons is Shabbat Shalom (שבת שלום).
kinyobi.
If you are saying "I am happy," you would use ureshii, or if you are saying happiness, you would say "shiawase"
You do not say "Happy Good Friday" in greek.... you actually say "Good Resurrection" which is "Kali Anastasi"
hadre fridia
To say "Happy Friday" in French, you can say "Joyeux vendredi." Another common expression is "Bon vendredi." Both phrases convey a cheerful greeting for the end of the week.
heureux, c'est vendredi !
sexta-feira feliz
Viernes noche feliz
You may say 'ureshii.'