In buenos dias, there is only an accent over the 'i' in the word dia.
Buenos dias. (there is an accent on the letter "i" in "dias")
Buenas Tardes
diez dias (with an accent mark over the "e" in diez and over the "i" in dias)
buenos dias, como amaneciste? buenos dias, has dormido bien?
Buenos dias is not a question soliciting a response, technically. However, the usual response is probably "igualmente" (same to you).
Buenos dias. (there is an accent on the letter "i" in "dias")
Buenas Tardes
"¿Buenos dias, Senorita (name), cómo esta?" (How are you?)
Buenos dias Alberto mean "Good Morning Alberto"
"Good morning to you" in Spanish is "buenos días a usted / ustedes / ti / vosotros, as"
Buenos: Dias Noches Senor Senora
Good morning = buenos dias
diez dias (with an accent mark over the "e" in diez and over the "i" in dias)
buenos dias, como amaneciste? buenos dias, has dormido bien?
Buenos dias is not a question soliciting a response, technically. However, the usual response is probably "igualmente" (same to you).
mundo de buenos dias means good morning world
'good morning sunshine' in Spanish is (word for word) 'sol de la mañana buena', but I think you mean 'Good morning, sunshine' (a greeting, plus 'sunshine') Good morning = Buenos dias 'Sunshine' as an affectionate nickname is not usual in Spanish, but literally = solana. So 'Buenos dias, solana'.