a male says: ani same'akh la-azor (×× ×™ שמח לעזור)
a female says: ani smekha la-azor (×× ×™ שמחה לעזור)
There is no such thing as "Hebrew Orthodox". There is only Hebrew. In Hebrew, you usually do not mention the name of the holiday in greetings. So you would just say Happy Holiday, which is hahg same'akh (חג שמח) Some communities do say Hanukkah Same'akh (חנוּכה שמח) meaning "Happy Hanukkah".
If you are asking how to say "Happy New Year" in Hebrew, it's shanah tovah (×©× ×” טובה)
You can't say Happy Friday in Hebrew, but a common greeting on Friday afternoons is Shabbat Shalom (שבת שלום).
This is how you say Happy Earth Day in Heberw, I just do not know how you say it i know how to write it and read it. :)(:
You can say Khag Purim Same'akh (חג פורים שמח) but it's more common just to say Khag Sameakh, which means happy holiday.
Chag sameach, chaverim!
There's no real way to say that in Hebrew. If you mean "be happy" then it's: to a male: תשמח (tees-MAHKH) to a female: תשמחי (tees-meh-KHEE)
Me'od same'ach (מאוד שמח) Me'ushar (מאושר)
You would just say Chag Sameach (חג שמח)
You would say ha'tsee'lu! (in an emergency).............la'azor(if a verb)
Oh, dude, you wanna impress your boss with some Hebrew? Cool. So, to say "Happy Boss's Day" in Hebrew, you'd say "Yom HaNasi Sameach." Yeah, it's like a boss-level greeting, you know? Just drop that on your boss and watch them be like, "Whoa, this person knows their stuff!"
It depends on the situation and plurality, but generally: שמח (Sah-may-ach).