YOU SAID:
Hello, how are you this evening?
INTO JAPANESE
こんにちは、今晩はお元気ですか?
BACK INTO ENGLISH
Hello, how are you tonight?
INTO JAPANESE
こんばんは、今夜はごきげんいかがですか?
BACK INTO ENGLISH
Hello, how are you tonight?
That didn't even make that much sense in English.