Date and time representation by country
conventions for the representation of date and time around the world
Different conventions exist around the world for date and time representation, both written and spoken. ... The calendar that is used for Date format. The order in which the year, month, and … Wikipedia
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Wikipedia
en.wikipedia.org › wiki › Date_and_time_representation_by_country
Date and time representation by country - Wikipedia
3 weeks ago - The little-endian format (day, month, year; 1 June 2022) is the most popular format worldwide, followed by the big-endian format (year, month, day; 2006 June 1). Dates may be written partly in Roman numerals (i.e. the year) or written out partly or completely in words in the local language.
DifferencesISO 8601Local conventions
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Wikipedia
en.wikipedia.org › wiki › List_of_date_formats_by_country
List of date formats by country - Wikipedia
4 days ago - The legal and cultural expectations for date and time representation vary between countries, and it is important to be aware of the forms of all-numeric calendar 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 "10 March 2026" (10/03/26, 10/03/2026, 10-03-2026 or 10.03.2026) and month–day formats such as "March 10, 2026" (03/10/26 or 03/10/2026).
Usage mapListing
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Worlddata
worlddata.info › homepage › timezones › date and time formats
Date and time: International formatting
Accordingly, half past five in the evening would be "17:30" or "5:30 pm." The 12-hour system is mainly used in English-speaking countries, the USA, Australia and the English-speaking parts of Canada.
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World Population Review
worldpopulationreview.com › country-rankings › date-format-by-country
Date Format by Country 2026
1 day ago - Details and analysis on date format per country, including descriptions of what the different date formats are, what date format is used by each country, and which countries use each date format.
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GitHub
gist.github.com › mlconnor › 1887156
Listing of countries with their preferred date formats, ISO3166 code, ISO629-2 · GitHub
Do you know where I could find a listing of each country's preference for 12-hour versus 24-hour time? Found it! https://www.ibm.com/docs/en/db2/11.5?topic=considerations-date-time-formats-by-territory-code
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Oracle
docs.oracle.com › cd › E19455-01 › 806-0169 › overview-6 › index.html
Time Formats (International Language Environments Guide)
Table 1-1 shows some of the ways to write 11:59 P.M. Table 1-1 International Time Formats · Time is represented by both a 12-hour clock and a 24-hour clock. The hour and minute separator can be either a colon ( : ) or a period ( . ). Time zone splits occur between and within countries.
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Stack Overflow
stackoverflow.com › questions › 157761 › date-time-formats-for-various-countries
locale - Date/time formats for various countries - Stack Overflow
Top answer
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The Common Locale Data Repository is an excellent resource for locale data. From the website you can download an xml version of the database, which includes datetime formats, number formats, and lots of other locale specific data.

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This webpage shows how to use date and time based on culture settings:
http://msdn.microsoft.com/en-us/library/5hh873ya.aspx

I'm assuming you're programming something so this would probably help you create a date-time based on the environmental settings.

As for using Windows settings vs researched settings, go with Windows settings if you're making something for Windows.

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Reddit
reddit.com › r/iso8601 › date-time format by region, visualised [v3, thanks for feedback!]
r/ISO8601 on Reddit: date-time format by region, visualised [v3, thanks for feedback!]
February 19, 2021 - I don't think anyone is claiming that it's necessary, it just happens to be how the standard time format has come to be in some parts of the world. More replies ... Dots are more commonly used in Korea: e.g. 2021. 2. 18 or 2021.02.18 ... It varies a lot in Europe too. The image is mostly about the order and general format, not document every country specifics.
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Fandom
calendars.fandom.com › wiki › Date_format_by_country
Date format by country | Calendar Wiki | Fandom
January 9, 2026 - The ISO 8601 format YYYY-MM-DD ({{#time:Y-m-d) is intended to harmonize these formats and ensure accuracy in all situations. Many countries have adopted it as their sole official date format, though even in these areas writers may adopt abbreviated ...
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En Academic
en-academic.com › dic.nsf › enwiki › 2546240
Date and time notation by country
In terms of dates, most countries still use the day-month-year format. Regardless of local usage, Canada officially uses the ISO 8601 date standard (yyyy-mm-dd) at the national level.
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Stack Overflow
stackoverflow.com › questions › 17440977 › list-of-common-date-and-time-formats-by-country-culture
.net - List of common Date (and Time) formats by country/culture - Stack Overflow
Top answer
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You can get it programmatically like this: 

//by culture
var formats = CultureInfo.GetCultures(CultureTypes.AllCultures)
    .ToDictionary(x => x.Name, x => x.DateTimeFormat.GetAllDateTimePatterns());

//or by country (only specific cultures has region/country info)
var formats = CultureInfo.GetCultures(CultureTypes.SpecificCultures)
    .GroupBy(x => new RegionInfo(x.Name).DisplayName)
    .ToDictionary(x => x.Key, x => x.SelectMany(y => y.DateTimeFormat.GetAllDateTimePatterns()).Distinct().ToArray());

For reference, this is the most comprehensive I've found

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Microsoft Learn
learn.microsoft.com › en-us › globalization › locale › date-time-formats
Format dates and times - Globalization | Microsoft Learn
ISO 8601 also specifies formats for durations and time intervals. ISO 8601 specifies that Monday is the first day of the week. However, Sunday and Saturday are also used as the first day of the week, depending on the country/region. Similarly, conventions for the weekdays/workweek and the weekend vary by country/region and can comprise one or two days, with Friday/Saturday or Saturday/Sunday being common combinations of weekend days.
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Unicode
cldr.unicode.org › translation › date-time › date-time-patterns
Date/Time Patterns
For example, if es (= es_ES, Spanish as used in Spain) uses 24-hour time formats, but es_US (Spanish as used in United States) uses 12 hour time formats, then es would use “HH:mm/H:mm” and es_US would use the “h” formats as described above. . ... Languages should always have translations for AM/PM/noon even if every country/region that the language is used in has 24 hour time.
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Wikipedia
en.wikipedia.org › wiki › Category:Date_and_time_representation_by_country
Category:Date and time representation by country - Wikipedia
Date and time representation by country · List of date formats by country · Date and time notation in Australia · Date and time notation in Bahrain · Date and time notation in Belgium · Date and time notation in Brazil · Date and time notation in Canada ·
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University of Cambridge
cl.cam.ac.uk › ~mgk25 › iso-time.html
International standard date and time notation
Similarly, the old German time notations hh.mm and hh.mm.ss have been replaced by the ISO notations hh:mm and hh:mm:ss. Those new notations are now also mentioned in the latest edition of the Duden. The German alphanumeric date notation continues to be for example “3. August 1994” or “3. Aug. 1994”. The corresponding Austrian standard has already used the ISO 8601 date and time notations before. ISO 8601 has been adopted as European Standard EN 28601 and is therefore now a valid standard in all EU countries and all conflicting national standards have been changed accordingly.
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Wikimedia Commons
commons.wikimedia.org › wiki › File:Date_format_by_country.svg
File:Date format by country.svg - Wikimedia Commons
November 13, 2018 - 2010-09-05T16:42:09Z Artem Karimov 940x477 (1631307 Bytes) {{Information |Description={{en|1=Date format by country.}} ---- |Source=*[[:File:BlankMap-World6.svg|]] |Date=2010-09-05 |Author=~~~ |Permission={{self|PD-self}} |other_versions= }} [[Category:Date format maps of the world]] [ Uploaded with derivativeFX · Click on a date/time to view the file as it appeared at that time.
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IBM
ibm.com › docs › en › db2 › 11.5.x
Date and time formats by territory code - IBM
The character string representation of date and time formats is the default format of datetime values associated with the client territory code of the application.
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Scribd
scribd.com › doc › 41663100 › International-Date-Formats
International Date Formats by Country | PDF | Business | Sports & Recreation
It shows that countries like Australia, Austria, Belgium, Brazil, Colombia, and Switzerland typically write dates with the day first, then the month, then the year in numeric form separated by slashes or periods.
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POEditor
poeditor.com › home › the basics of date and time localization
The basics of date and time localization - POEditor Blog
October 21, 2024 - You’ll encounter this format in the United States and a few other countries like Canada and the Philippines. Here, “02/01/2025” would be February 1, 2025. YYYY/MM/DD. This format is standardized by ISO 8601 and used in places like China, Japan, Korea, and for technical purposes worldwide (e.g., databases, APIs).
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Wikiwand
wikiwand.com › en › Date_and_time_representation_by_country
Date and time representation by country - Wikiwand
In many countries it is common in spoken language to refer to times in minutes or fractions of an hour relative to the following hour rather than the previous one for times after the 30 minute mark – eg 8:55 would be said as "five to nine", and 6:45 would be "quarter to seven". In French and Italian, the quarters are expressed as additions or subtractions of the full hour: sept heures et quart (literally "seven hours and quarter"), sept heures et demie ("seven hours and half"), huit heures moins le quart ("eight hours less the quarter"). It is also common to use this format in Portuguese, specifically in the northern part of Portugal.