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 19, 2026
19 March 2026
All-numeric date 03/19/2026
2026-03-19
19 03 26
19 03 2026
Time 6:04 pm
18:04
Factsheet
Full date March 19, 2026
19 March 2026
All-numeric date 03/19/2026
2026-03-19
19 03 26
19 03 2026
Time 6:04 pm
18:04
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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
3 days ago - In traditional American usage, dates are written in the month–day–year order (e.g. March 19, 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. 6:04 pm). 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

How do Americans write dates?
mm/dd/yyyy is standard everywhere I've been other than the military. More on reddit.com
🌐 r/AskAnAmerican
95
28
September 11, 2018
American Date Format?!?
Do you use 2 or 4 digits for the year? If you are American and you cannot figure out 2024-02-27 means, you are an idiot. ISO is closer to the American convention in that it is month followed by day. ISO moves the year to the front for good reason. If it's 4 digits, it is obvious what it means. More on reddit.com
🌐 r/ISO8601
101
316
February 27, 2024
american english - Date format in UK vs US - English Language & Usage Stack Exchange
Why is the most common date format in the US like mm/dd/yyyy, whereas in Europe (including the UK) it's more common to have dd/mm/yyyy? Looking around, I found that the US form is actually the more More on english.stackexchange.com
🌐 english.stackexchange.com
May 24, 2012
Why do american use mm/dd/yy format?
Because when you say a date when you're speaking, we say "January 15th, 2012" or "August 8th, 1993". So when we write the date in short form, we write it in the order we say/think it. More on reddit.com
🌐 r/AskAnAmerican
122
0
May 19, 2021
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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 - The U.S. date format is month-day-year: the month appears before the day (May 12, 2022), while UK style is day-month-year: the day appears before the month (12 May 2022). A comma separates day and year in American English; no comma is necessary ...
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Enchanted Learning
enchantedlearning.com › calendar › writingthedate
Writing a Date (US format) - EnchantedLearning.com
Numerical Format: month/date/year Sometimes, a date is written in numerical form, like this: 6/28/15 or 6/28/2015 (month/date/year). Note that the month is replaced by a number (see the chart below) and sometimes only the last two digits of ...
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Medium
medium.com › @SvilenK › linguistic-usability-why-the-american-date-format-is-superior-abc999c7bd80
Linguistic Usability: Why The American Date Format is Superior | by Svilen | Medium
March 6, 2019 - The U.S. is known to disregard worldwide standards in favor of its own quirky and often unintuitive systems of inches, ounces, and gallons. While the majority of the world adheres the popular date format: Day, Month, Year (ex: 4, July, 1776.) ...
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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.
Find elsewhere
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The Guardian
theguardian.com › news › datablog › 2013 › dec › 16 › why-do-americans-write-the-month-before-the-day
Why do Americans write the month before the day? | US news | The Guardian
July 17, 2017 - But let's face it, it's weird. Basic group behaviour shows it's weird. Despite the variety of date formats used around world, the US is the only country to insist on using mm-dd-yyyy.
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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 - For instance, depending on the order style, the abbreviated date "01/11/06" can be interpreted as "1 November 2006" for DMY, "January 11, 2006" for MDY, or "2001 November 6" for YMD. The ISO 8601 format YYYY-MM-DD (2026-03-19) is intended to harmonise these formats and ensure accuracy in all ...
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World Population Review
worldpopulationreview.com › country-rankings › date-format-by-country
Date Format by Country 2026
1 week 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 ...
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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 generally gravitate towards speaking and writing out 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 ...
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YouTube
youtube.com › lost in the pond
Why Do Americans Write the Date Like This? | #shorts - YouTube
AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new features · © 2024 Google LLC
Published   November 12, 2023
Views   3M
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Oreate AI
oreateai.com › blog › understanding-date-formats-in-the-usa-a-simple-guide › e80d2042efef96c475eb075d303acf24
Understanding Date Formats in the USA: A Simple Guide - Oreate AI Blog
December 29, 2025 - This format can be confusing for those accustomed to other styles. In American English, dates are often expressed numerically as MM/DD/YYYY—so July 4th becomes 07/04/2023.
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Quora
quora.com › Why-does-the-U-S-use-the-most-confusing-date-format-in-the-world
Why does the U.S. use the most confusing date format in the world? - Quora
The United States and their largest trading partner Canada use “mm-dd-yyyy”, however, Canada also employs the “dd-mm-YYYY” format internally. When English settlers came to the New World, they brought this particular sequence from England.
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Quora
quora.com › Is-the-YYYY-MM-DD-format-commonly-used-in-American-English
Is the YYYY-MM-DD format commonly used in American English? - Quora
The United States and their largest trading partner Canada use “mm-dd-yyyy”, however, Canada also employs the “dd-mm-YYYY” format internally. When English settlers came to the New World, they brought this particular sequence from England.
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Reddit
reddit.com › r/iso8601 › american date format?!?
r/ISO8601 on Reddit: American Date Format?!?
February 27, 2024 -

My Operations Manager pulled me to the side today to talk about a little issue.

I've been dating all of my paperwork using ISO - well apparently I've been doing things all wrong because of this.

People look at my "foreign dating method" and are confused and then somehow do not understand any of my content.

It has been requested that going forward I date all my paperwork with an "American Date format"

sighs

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Quora
quora.com › How-do-I-write-the-date-in-America
How to write the date in America - Quora
Answer (1 of 3): In the USA, we write the date: Month/Day/Year. Since the turn of the century, it has been mm/dd/yyyy, or 2/14/2021 (Valentine’s Day). IN the rest of America (Mexico, South American countries, Central American countries) it’s ...
Top answer
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18

Although there are people who will sometimes say:

  1. Today is Thursday, the 24th of May, 2012.

There are also others who instead say the same thing this way:

  1. Today is Thursday, May 24th, 2012.

Certainly in the United States, the second way of mentioning a date is more common than the first. The long form sounds more formal to us, as in “on the Fourth of July” being more formal and long-winded than simply saying “on July 4th”.

It was pronouncing the month before the day out loud that gave to retaining that same original order when converted to digits: merely convert the month name to a natural number, and there you have your answer. What’s today’s date? It’s May 24th. Instead of writing May-24, we simply change the “May” to “5” and write 5-24 or ⁵⁄₂₄.

That way it follows the natural language order and so requires no mental gymnastics to switch things around when speaking the date aloud. Similarly “September 11th” gets written ⁹⁄₁₁, etc.

The full spoken form with the year, “May 24th, 2012”, then becomes the written shorthand “5/24/2012”, or often just “5/24/12”. “Christmas of 2001” can be, and somewhat annoying often is, written “12/25/1”, while “January 25th, 2012” becomes “1/25/12”.

This isn’t usually any sort of problem because of universal consensus on how to interpret such things in the United States. If you write day/month/year in America, you will not be understood. Although I myself prefer the ISO notation, normal people do not use it in their daily affairs.

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4

It's very possible that the US inherited this from an outdated English format - much like the length unit, after Henry III's foot and which the English have left behind in favour of the more logical metric system.

One argument I've heard in favour of the American system of dating is that the numbers of months in a year is smaller than the number of days in a month which itself is smaller than the number of possible years. So you would have 12/31/2013, in ascending order. I don't really buy this argument, but OP might be interested in it anyway so here it is.

Meanwhile, in Northern Europe they've moved on to an opposite, descending date standard: year/month/day.