YOU SAID:
Hi mate I have a great day
INTO JAPANESE
こんにちは、私は素晴らしい一日を過ごしました
BACK INTO ENGLISH
Hi, I had a great day
INTO JAPANESE
こんにちは、素晴らしい一日を過ごしました
BACK INTO ENGLISH
Hello, we had a great day
INTO JAPANESE
こんにちは、素晴らしい一日を過ごしました
BACK INTO ENGLISH
Hello, we had a great day
That didn't even make that much sense in English.