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

“It’s a good day for the state of California.”

From The Wall Street Journal ● Sep. 10, 2026

Yet he was in the booth, and on the air for nine innings, so Saturday was a very good day indeed.

From Los Angeles Times ● Aug. 16, 2026

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

From BBC ● Jul. 5, 2026

“The student-loan system is confusing on a good day, and we’re moving into a period where there’s likely to be heightened confusion,” she said.

From MarketWatch ● Jul. 1, 2026

“Thanks, Aunt Sera. They keep sending me a million starposts. What are you doing? Did you have a good day? Did you eat? How's this and how's that?”

From "The Marvellers" by Dhonielle Clayton