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

“You’ve come on a good day, fox. Show him what we found, Two.”

From Literature

On a good day, she sees half of her old business; on a bad day, a fifth.

From The Wall Street Journal

“There’s a lot more work to do. This is just the beginning, but today was a good day,” he said.

From Salon

"So I have good days when I can pretty much do anything, and other days where it's hard to just move around."

From BBC

Ward’s song “does NOT guarantee you will have a good day,” another skeptic warned.

From The Wall Street Journal