YOU SAID:
It's 1:56am and I don't know sleep
INTO JAPANESE
午前1時56分で、睡眠がわからない
BACK INTO ENGLISH
I don't know sleep at 1:56 am
INTO JAPANESE
午前1時56分に睡眠が分からない
BACK INTO ENGLISH
I don't know sleep at 1:56 am
That didn't even make that much sense in English.