昼ちゅう夜やを問とわず

expression

day and night; around the clock

Used adverbially to mean that something happens continuously, without regard to day or night. Often used in formal or written contexts.

• 工こう事じは昼ちゅう夜やを問とわず続つづけられた。

  The construction continued around the clock.

• この店みせは昼ちゅう夜やを問とわず営えい業ぎょうしている。

  This shop is open day and night.