夜更(よふ)けlate at night

夜更(よふ)けは外(そと)が真(ま)っ暗(くら)です。

The outside is pitch black late at night. {late at night}

幽霊(ゆうれい)がよく出(で)る時間(じかん)帯(たい)は夜更(よふ)けである。

The time when ghosts often appear is late at night. {late at night}

夜更(よふ)けに外(そと)を一人(ひとり)で歩(ある)き回(まわ)るのは危険(きけん)だ。

It is dangerous to walk around outside alone late at night. {late at night}

親友(しんゆう)と夜更(よふ)けまで七(なな)時間(じかん)にわたって語(かた)り合(あ)っていました。

I was talking with my best friend until the late hours of the night for seven hours. {late at night}

夜更(よふ)けまで遊(あそ)び歩(ある)いていたのなら不審(ふしん)者(しゃ)に絡(から)まれるのも当然(とうぜん)だ。

If you were wandering around playing until the wee hours of the night, it's only natural that you'd get involved with suspicious people. {late at night}