What is the Latin translation for harvest moon?

Answer 1

The answer (if we want to follow the good examples of Julius Caesar and Virgil) is actually 'Luna plena.'

'plenus Luna' is incorrect for two reasons. First plenus is the wrong gender. Luna is a feminine noun meaning 'moon' and so the adjective should be feminine as well: plena. Second, Latin tends to put the adjective after the noun (except in certain situations such as with adjectives of quantity--e.g., Magna Graecia), and so the phrase should really be Luna plena. That is how Julius Caesar (B.G. 4.29, for instance) and Virgil expressed the idea of "full moon" and so it seems good enough for us!

Answer 2

Messis lunae

Answer 3

luna.

Answer 4

Luna piena