"Καλησπέρα αγόρι"

Translation: Good evening boy

[TriggerSmooth]

σπέρα, compare with latin vesper, both from https://en.wiktionary.org/wiki/Reconstruction:Proto-Indo-European/wek(%CA%B7)speros

French vespéral : of the evening

[Andra129289]

Its hard to make the difference between Καλημέρα and Καλησπέρα!

[GenevieveLaurin]

The sentence "Good evening boy" doesn't seem quite right to me, even though it is the literal translation. I think "Good evening young man" conveys the same sense, while being more polite. In my opinion, it should be an accepted translation.

[pspai]

αγόρι is in the vocative case?

[D_..]

Correct! When you address someone directly, you use their name/title in the vocative case.

[fluffymochii]

Should we use "αγόρι" everytime we want to say "καλησπέρα"?

[D_..]

Αγόρι means 'boy', so no.

[IIIIIIIVV]

any native speaker to explain, as this is not a phrase that is used in English. Would I greet a man this way, or a male in general, or is it really just to address a male child?

[G.Georgopoulos]

It's uncommon, but nevertheless correct if you want to address a friend.