Notation that differs from almost all other countries
Date and time notation in the United States differs from that used in nearly all other countries. It is inherited from one historical branch of conventions from the United Kingdom. American styles … Wikipedia
Factsheet
Full date March 16, 2026
16 March 2026
All-numeric date 03/16/2026
2026-03-16
16 03 26
16 03 2026
Time 4:28 am
04:28
Factsheet
Full date March 16, 2026
16 March 2026
All-numeric date 03/16/2026
2026-03-16
16 03 26
16 03 2026
Time 4:28 am
04:28
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Wikipedia
en.wikipedia.org › wiki › Date_and_time_notation_in_the_United_States
Date and time notation in the United States - Wikipedia
1 day ago - In traditional American usage, dates are written in the month–day–year order (e.g. March 16, 2026) with a comma before and after the year if it is not at the end of a sentence, and time is written in 12-hour notation (e.g. 4:28 am). International date and time formats typically follow the ...
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ISO
iso.mit.edu › americanisms › date-format-in-the-united-states
Date Format in the United States | ISO
The United States is one of the few countries that use “mm-dd-yyyy” as their date format–which is very very unique! The day is written first and the year last in most countries (dd-mm-yyyy) and some nations, such as Iran, Korea, and China, write the year first and the day last (yyyy-mm-dd).
Discussions

Why do Americans write the date as mm/dd/yyyy rather than dd/mm/yyyy or yyyy/mm/dd?

I believe it’s because of how it’s said colloquially in conversation. I.e. When is your birthday? “It’s August 3rd, 2018” then becomes 8/3/2018.

So the more proper English Empire/Commonwealth answer being “The 3rd of August, 2018.” Which tracks to 3/8/2018.

Would be a good follow on question for folks who speak other languages to find out if the language dictates/matches the formatting or not...

More on reddit.com
🌐 r/answers
102
159
September 13, 2016
So day / month / year is used in American English after all? 🤔
You bought it in Belgium. It complies with EU regulations. Otherwise it could not be sold there. Where it was made is totally irrelevant. More on reddit.com
🌐 r/ENGLISH
97
211
May 7, 2025
Why do Americans prefer the MM/DD/YYYY date format both in written and spoken?
People have pointed out its easier to say which is true, but a large part of it is just what you're used to, Americans have grown up using that format, using anything else is confusing and requires more effort than is often worth it More on reddit.com
🌐 r/NoStupidQuestions
323
141
March 21, 2025
formatting - Do American users also confuse the day and the month in dates like 01/02/2013 - User Experience Stack Exchange
As a general rule if the viewing ... display format would be safer, though that seems to be outside your use case, so 01-28-2011 would be acceptable. ... How is this an international standard? Try guessing what date this is: 28-Фев-2012. ... @PashaS: The C language standard specifies that DATE will expand to a macro with the compilation date using the first three characters of the English-language names of the months, so at least ... More on ux.stackexchange.com
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May 21, 2013
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Oracle
docs.oracle.com › cd › E41183_01 › DR › Date_Format_Types.html
Date Format Types
You are here: Function Reference > Date Functions > Date Formats > Date Format Types · Month abbreviations consist of the first three characters of the month’s name. Months with four-character names, such as June, are not abbreviated.
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Wikipedia
en.wikipedia.org › wiki › List_of_date_formats_by_country
List of date formats by country - Wikipedia
1 week ago - The legal and cultural expectations ... dates used in a particular country to know what date is intended. Writers have traditionally written abbreviated dates according to their local custom, creating all-numeric equivalents to day–month formats such as "14 March 2026" (14/03/26, 14/03/2026, 14-03-2026 or 14.03.2026) and month–day formats such as "March 14, 2026" (03/14/26 or 03/14/2026). This can result in dates that are impossible to understand correctly without knowing the ...
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The Editor’s Manual
editorsmanual.com › articles › style › numbers
How to Write Dates in American and British English | The Editor’s Manual
December 20, 2023 - American date format is month-day-year (May 1, 2021); British is day-month-year (1 May 2021). Use commas between day and year in American English; no commas are needed in dates in British English.
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Today You Should Know
todayyoushouldknow.com › articles › why-do-americans-use-a-mm › dd › yy-date-format
Why does America use a MM/DD/YY date format? — Today You Should Know
September 14, 2024 - The best theory is that Americans ... dates with the month first. As a result, it makes sense to replicate that in the numbered American date format of MM/DD/YY, where the month comes before the day and year.
Find elsewhere
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Enchanted Learning
enchantedlearning.com › calendar › writingthedate
Writing a Date (US format) - EnchantedLearning.com
December 20, 2023 - Long Format: Day, Month date, year Sometimes, a date is written in long form, like this: Sunday, June 28, 2015 (note that there are commas after the day of the week and the day of the month, but there is no comma after the month).
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Grammarly
grammarly.com › blog › writing-tips › how-to-write-dates
How to Write Dates Correctly | Grammarly
July 1, 2023 - Many people get confused about how to write dates with commas, so here is a rule of thumb: In the month-day-year format (used in the United States), place commas after the day and year.
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Quora
quora.com › What-is-the-standard-date-format-for-the-United-States
What is the standard date format for the United States? - Quora
Answer (1 of 2): For the USA, it’s mm/dd/yy (optionally yyyy), so the Twin Towers attack was on September 11th, 2001, written in the USA as 911, the US emergency number. In the UK it would be 11/9/01 and in Japan it would be 20010911, I believe.
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Reddit
reddit.com › r/english › so day / month / year is used in american english after all? 🤔
r/ENGLISH on Reddit: So day / month / year is used in American English after all? 🤔
May 7, 2025 -

I bought this from a Belgian (I think) online store that sells American products because I wanted to taste these famous peanut butter cups and I was surprised to see the dates like this. So is this date system also used in American English after all? 🤔

BTW, it doesn't seem to be a European imported version of the product.

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Adobe
adobe.com › acrobat › resources › how-to-write-the-date.html
How to write dates correctly | Adobe Acrobat
For example, even though we may say “January first, two thousand twenty-five,” we write “January 1, 2025.” Remember to place the comma after the day and before the year in the month-date format. However, if you include of in the sentence, then write out the date with an ordinal number. For example, “James was born on the 1st of January.” You can also use an ordinal number for more informal writing, such as “James was born on January 1st.”
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Quora
quora.com › How-do-the-US-and-UK-differ-in-their-formats-for-writing-dates-and-months
How do the US and UK differ in their formats for writing dates and months? - Quora
Because in everyday speech, we don’t. We just say the day of the month and the name of the month. And it doesn’t matter which order we say them, because there’s no possibility of them getting confused. “September 10th” and “October 9th” are obviously different. But the format “October the 20th” used to be the standard in English speaking countries. (Though the word “the” was omitted in writing.) American usage reflects that historical formality, even when the dates are written with numbers rather than the name of the month being written in letters.
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Reddit
reddit.com › r/nostupidquestions › why do americans prefer the mm/dd/yyyy date format both in written and spoken?
r/NoStupidQuestions on Reddit: Why do Americans prefer the MM/DD/YYYY date format both in written and spoken?
March 21, 2025 -

How come US is the only country that uses Month-Day-Year data format more than other formats? I look at the list on Wikipedia and while other countries use this format, they also use other formats as well. It seems like most of the countries are influenced by US. Canada especially.

Why do Americans in general prefer this format both verbally and orally? What is the origin behind this preference? Isn't it easier to say it in ascending or descending order? What makes saying the month first so special? I'm asking this as somebody who grew up with MM-DD-YYYY. A lot of people from other countries tend to get confused at times with this format.

Top answer
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People have pointed out its easier to say which is true, but a large part of it is just what you're used to, Americans have grown up using that format, using anything else is confusing and requires more effort than is often worth it
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The boring non-answer that’s the real answer: Americans generally prefer it because it’s what we’re used to. We’ve been exposed to that date format millions of times, and so it’s what our brains are accustomed to. Does it have disadvantages? Yes — beyond the obvious problems that come from using a standard that can be confused with the international standard (01/10/2025 could potentially be “Jan. 10” or “1 Oct.,” and it’s not always clear which), there’s definitely a value in ascending order, as you mention. (Or descending order, preferred in computer contexts but generally cumbersome in real life because the year usually doesn’t need to be specified.) As an American, I do recognize these, but it’s just one of millions of examples of how my speech (and all English speech) isn’t organized the way you would if you designed it from scratch. Does it have advantages? Sure. The biggest one, to me, is that it starts with the information I typically need first. If I’m scheduling an appointment and they say “how about May 5,” I’m going to look at my calendar under May, then I’m going to look for the 5th day. If your real question is “why did the US develop this standard in the first place,” I suspect that’s why: businesses, politicians and other powerful people wanted to know the month first, followed by the day, and so they popularized the trend of saying and writing the month first. But why did the format develop differently in the US than in most of the rest of the world, when the same arguments for and against it are equally relevant everywhere? I don’t know.
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Unicode
cldr.unicode.org › translation › date-time › date-time-patterns
Date/Time Patterns
April 1, 2025 - The number of letters indicate the form of the names to be used. ... Numeric representation: M or MM for 9 or 09, with leading 0. This is intended to be used in conjunction with a day number; thus, 9/12 or 09/12 ... When formatting a particular date, non-numeric values (e.g. month names from ...
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Microsoft Learn
learn.microsoft.com › en-us › windows › win32 › intl › day--month--year--and-era-format-pictures
Day, Month, Year, and Era Format Pictures - Win32 apps | Microsoft Learn
January 7, 2021 - ... The format types "d", "g", and "y" must be lowercase and the letter "M" must be uppercase. For example, to get the date string "Wed, Aug 31 94", the application uses the picture string "ddd',' MMM dd yy".
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I don't have a pointer to published research - but in my experience US folk will always assume the US MM/DD/YYYY format unless they are knowingly using an non-US site, and are already aware of the potential differences.

If you have to use numbers only then the format that causes least confusion across cultures in my experience is YYYY-MM-DD since it differs from both "defaults" and doesn't suffer from any assumptions.

That said using an abbreviated three letter month name is only one extra character - the size argument for using numbers is usually bogus.

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Please see ISO 8601 (eg http://en.wikipedia.org/wiki/ISO_8601)

yyyy-mm-dd hh:mm:ss

First, this is simply the largest to the smallest unit. No other argument--no matter how tightly held--can seem to overcome this logic.

The 4-digit year removes any confusion as to what the other numbers represent--even when the hyphens are left out. (Use of a 2-digit year--in any order--cannot always establish anything.)

I discovered this dating schema decades ago looking at a Star Trek calendar and saw that stardates were yyyymm.dd (Note: I was looking at calendars--not Star Trek stuff.)

I am an American with a mild dyslexia. I saw (or perceived) just enough dates that were written "backwards" that I could and can never remember which order we are expected to presume they mean if the days (or years) are also 1-12. (I also eschew the " / " as these make the date look confusing.)

I use year-month-date both with and increasingly with out hyphens or spaces; and day, year month date where the day and the month are spelled out. This is by my choice--the ISO 8601 just gives me a fallback argument--in case I ever need one.

NOTE: Some software programs might use, eg, "mm" for minutes, "MM" for month in numbers, and "MMMM" for the month spelled out; "hh" might mean 12-hours and "HH" might mean 24-hours. All of these codes within their own software are subject to the whim of the programmer(s).

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Quora
quora.com › Will-USA-ever-change-its-date-format-to-day-month-year-or-should-it-jump-to-year-month-day-hour-min-sec
Will USA ever change its date format to day-month-year or should it jump to year-month-day-hour-min-sec? - Quora
November 9, 2018 - Expect continued domestic use of MM/DD/YYYY in everyday life, coupled with growing adoption of ISO 8601 (year-month-day with optional time) in official, technical, and cross-border contexts. Over time, machine-readable YYYY-MM-DD[T]hh:mm:ss will become the de facto standard for data and records, while human-facing formats continue to coexist. ... RelatedWhy does America write the date as Month/Day/Year when most of the world writes it Day/Month/Year?
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World Population Review
worldpopulationreview.com › country-rankings › date-format-by-country
Date Format by Country 2026
3 days ago - Even though the United States is one of the largest countries on Earth, its date format is somewhat unusual compared to many other nations. In the United States, the date format follows the month-day-year sequence, meaning 1/10/2022 is read ...