night and day

Idioms  

1. Also day and night. Continually, without stopping. This phrase is used either literally, as in The alarm is on night and day, or hyperbolically, as in We were working day and night on these drawings. Shakespeare put it by night and day in The Comedy of Errors (4:2): “Time comes stealing on by night and day.”

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Example Sentences

“Night and day,” said Alfredo.

From Slate

But the regular alarms, which send Israelis into shelters night and day, and the increasing use of cluster munitions, has left some in this war-weary population starting to ask when and how it will end.

From BBC

"They fight night and day. They know where to hide above and below ground," Bitar said.

From Barron's

They relish one relaxing night and day before they are interrupted by a late-night knock on the door.

From The Wall Street Journal

"You'll just be working night and day once the weather turns turns good."

From BBC