YOU SAID:
How are yall doing on this fine day
INTO JAPANESE
天気の良い日、元気に過ごしていますか
BACK INTO ENGLISH
How are you doing on a fine day?
INTO JAPANESE
天気の良い日、いかがお過ごしですか?
BACK INTO ENGLISH
How are you doing on this fine day?
INTO JAPANESE
天気の良いこの日、いかがお過ごしですか?
BACK INTO ENGLISH
How are you doing on this fine day?
That didn't even make that much sense in English.