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

Sanchez worked in various local newsrooms before landing roles as a reporter and anchor at outlets like Fox Sports Net, Extra, and Good Day LA.

From BBC • Jun. 26, 2025

Blake belongs to an LGBTQ-affirming Christian church and wrote a '90s-style country-pop tune called "Good Day" for his congregation to "sing on Sunday mornings."

From Salon • Mar. 8, 2024

Shares of India's Britannia Industries surged to a record high on Thursday, a day after the maker of Good Day and Little Hearts biscuits reported its third-quarter profit more than doubled.

From Reuters • Feb. 2, 2023

And when the Missouri campaign needed help gathering petition signatures, Good Day Farm paid an additional $1 million directly to the firm circulating the petitions.

From Seattle Times • Nov. 2, 2022

So because it was a Super Good Day I decided to walk into the park with Mrs. Alexander, even though it scared me.

From "The Curious Incident of the Dog in the Night-Time" by Mark Haddon