OK Day

OK Day is observed next on Sunday, March 23rd, 2025 (344 days from today).

How many days until OK Day?


Have you ever known the origin of OK Day? If you are trying to figure out the origin of this day OK, is also spelled as okay, O.K., or ok, could be the most used word around the world. OK has become one of the most versatile words.

The origin of OK Day

March 23, 1839 is the first time to publish the word “O.K.” in The Boston Morning. Its meaning is all correct but there is a popular slang misspelling, “oll korrect”. OK is steadily made its way into the everyday speech of Americans.

Allan Metcalf who is the author of OK, The Improbable Story of America's Greatest Word, created OK Day and was first held in 2011. Metcalf said that "OK" may be one of the most important American words.

How "OK" become national vernacular?

OK has become the national versatile word in the English Language—as used today, it can mean everything from “just fantastic” to “out of bodily danger”. It is believed that this word was first used in the 1830s as a slang word, especially by young and educated people, who misspelled words intentionally and then abbreviated them. OK meaning is "oll korrect," a misspelling of "all correct." Other slang words were "KY", its meaning were "no use"; "KG" standing for "know go", with meaning “no go"; and "OW," standing for “all right” but misspelling is oll wright. The word first appeared in The Boston Morning Post on March 23, 1839, explaining why OK Day takes place when it does.

How to Observe OK Day

Celebrate this day by using the word "OK" as much as possible, okay? You can even use phrases that are similar to it, such as "okie dokie”. You could also learn more about the word by reading Allan Metcalf's OK: The Improbable Story of America's Greatest Word.


OK Day has been observed annually on March 23rd.


Thursday, March 23rd, 2023

Saturday, March 23rd, 2024

Sunday, March 23rd, 2025

Monday, March 23rd, 2026

Tuesday, March 23rd, 2027

Founded by

Allan Metcalf



Also on Sunday, March 23rd, 2025

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