YOU SAID:

Nights are darker some days than other days.

INTO JAPANESE

夜は他の曜日よりもいくつかの日暗いです。

BACK INTO ENGLISH

It's dark at night some day than other days of the week.

INTO JAPANESE

週の他の日もいつの日か夜は暗いです。

BACK INTO ENGLISH

Other days of the week at any time day or night is dark.

INTO JAPANESE

昼夜を問わずいつでも週の他の曜日は暗いです。

BACK INTO ENGLISH

Is dark on all other days of the week at any time, day or night.

INTO JAPANESE

任意の時間、日または夜に週のすべての他の日に暗いです。