the dead of night; midnight.
??に in the dead of night; at midnight.
深夜営業 late-night operation.
深夜勤務 the late-night shift; 〔話〕the graveyard shift.
深夜バス a late-night bus (service).
深夜番組 a late night [midnight] program.
深夜放送 [midnight broadcasting.
深夜料金 a late-night charge.