night and day

adverb

: all the time : continually

Examples of night and day in a Sentence

night and day she reminded him that if it weren't for her, he'd be a nobody
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This part of the story is a story in itself, but the wars and the result left two-thirds of the recruits dead and rendered Rusty’s appendages useless as he selflessly piloted night and day to fight off every rogue machine. Manuel Muñoz, Literary Hub, 11 Sep. 2025 The difference falls short of night and day, though. PC Magazine, 9 Sep. 2025 Jaacovi says that, for her, the difference between parenting and grandparenting is like night and day. Suzanne Nuyen, NPR, 7 Sep. 2025 Sprung from a dirt lot in central Connecticut, it was built on the boundless energy of sports fanatics who doubled as employees, growing into a distinctly focused institution left alone to serve millions of fellow fans night and day and generate billions in profits. Laura Gentile, Sportico.com, 28 Aug. 2025 See All Example Sentences for night and day

Word History

First Known Use

before the 12th century, in the meaning defined above

Time Traveler
The first known use of night and day was before the 12th century

Browse Nearby Words

Cite this Entry

“Night and day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/night%20and%20day. Accessed 15 Sep. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!