good day

American  

interjection

1. a conventional expression used at meeting or parting during the daytime.

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good day British  

1. a conventional expression of greeting or farewell used during the day

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good day Idioms  

1. Also,. Formal ways of saying “Hello” or “Goodbye.” For example, He began rather oddly by addressing the audience with “Good day,” or “Good afternoon, ladies,” said the sales clerk as we walked out. All these greetings represent an abbreviation of the now obsolete God give you a good day (afternoon, etc.), which dates from about 1200. Also see good night.

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Etymology

Origin of good day

Middle English word dating back to 1175–1225

Example Sentences

"Good day sir. I am Russian naval officer - please don't shoot my group on video."

From Reuters • Aug. 15, 2023

"Good day tech enthusiasts…" is not my usual greeting of choice.

From BBC • Mar. 6, 2023

Good day care was hard to find, Ms. deYoung said, and many parents felt guilt for relying on it.

From New York Times • Mar. 31, 2021

“Respect me and my privacy as I’m trying to have a baby. Good day sir.”

From Washington Times • Jun. 27, 2017

“It’s all there, black and white, clear as crystal! You stole fizzy-lifting drinks, so you get NOTHING! You lose! Good day, sir!”

From "Marcus Vega Doesn't Speak Spanish" by Pablo Cartaya