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

See Examples For:

good day

"Today is a good day for democracy, the rule of law, and the American people looking to exercise their Constitutional right to vote," the governor said in a statement.

From Barron's ● Sep. 15, 2026

“It’s a good day that we took steps to strengthen the program and while we have to do more next year, this was a crucial first step,” Zbur said in an interview.

From Los Angeles Times ● Sep. 1, 2026

Tuesday wasn’t a good day for International Business Machines.

From The Wall Street Journal ● Jul. 15, 2026

"It doesn't matter if it is a good day or a bad day," he said.

From BBC ● Jul. 5, 2026

So tomorrow would be a good day to begin traveling again.

From "Homecoming" by Cynthia Voigt