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

"Since the flooding began, our teams have worked through the night and day dealing with more than 200 call-outs," the authority said.

From BBC

"The difference was night and day, for the first time I felt listened to and heard. I described the symptoms, and he confirmed I wasn't imagining it and there was a solution," Gail said.

From BBC

It's much better now, it's like night and day.

From BBC

Its descending bass line, colored by Fender Rhodes piano and Mr. Frampton’s tender vocals, result in a soulful serenade: “Wanna be with you night and day / Ooh, baby, I love your way.”

From The Wall Street Journal

Amorim was dismissed on 5 January and Rooney said United's win over City was "night and day from what we've been seeing" under the Portuguese.

From BBC