Comments on this document should be sent todatetime-comments@w3.org. at all.) This page last updated 2001-12-21. This document is a NOTE made available by the W3 Consortium fordiscussion only.This indicates no endorsement of its content, nor that the Consortium has,is, or willbe allocating any resources to the issues addressed by the NOTE. only 12 months. Or is that February (We're good for the which one is the year question in the year 2000, It’s time for ISO 8601.This ISO standard helps remove doubts that can result from the various day–date conventions, cultures and time zones that impact a global operation. ISO 8601 defines acceptable formats for times as well; it's available in PDF Representations for information interchange – Part 1: Basic rulesRepresentations for information interchange – Part 2: ExtensionsAll ISO publications and materials are protected by copyright and are subject to the user’s acceptance of ISO’s conditions of copyright. For example, September 27, 2012 is represented as 2012-09-27. If you have any questions or suggestions regarding the accessibility of this site, please
For example, 01/05/12 could mean January 5, 2012, or May 1, 2012. This means you're free to copy and share these comics (but not to sell them).

want to let them know. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. ISO 8601 tackles this uncertainty by setting out an internationally agreed way to represent dates: YYYY-MM-DD. All copyright requests should be addressed to We humans can tell that 06/23/98 all three forms.)

Looking for an unambiguous calendar-and-clock format that is internationally understood? and 98/06/23 are the same -- 23 has to be a day of the month because there are form at: This ISO 8601 format for dates has a number of good features.

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Buy this standard Abstract Preview. The ISO standard date format is defined in the ISO 8601: yyyy-mm-dd. 1, 1001?


Selon ce format, la date du 27 septembre 2012 se présente sous la forme 2012-09-27.

ISO 8601 defines acceptable formats for times as well; it's available in PDF form at: It gives a way of presenting dates and times that is clearly defined and understandable to both people and machines.When dates are represented with numbers they can be interpreted in different ways. Avec ISO 8601, vous disposez d’un format normalisé pour la représentation des éléments suivants : Date; Heure du jour Th…

On an individual level this uncertainty can be very frustrating, in a business context it can be very expensive.

February 1, 2001 or January 2, 2001? that the software that process the data entered on the form does too. ISO 8601 dissipe toute confusion en établissant, pour la représentation de la date, un format internationalement reconnu : YYYY-MM-DD. What to do? Writing a four-digit year will at least tell you which one is the year. This content is no longer maintained. ISO 8601-1:2019 Date and time — Representations for information interchange — Part 1: Basic rules. ISO 8601:2004 is applicable whenever representation of dates in the Gregorian calendar, times in the 24-hour timekeeping system, time intervals and recurring time intervals or of the formats of these representations are included in information interchange. Any use, including reproduction requires our written permission. Please visit our For example, in the United States, June 23, 1998 is often written as 06/23/98.

Standardization is a truly international activity, and I’ve been lucky to have worked with more nationalities than I can remember. La norme internationale ISO 8601 spécifie la représentation numérique de la date et de l'heure — respectivement basées sur le calendrier grégorien et le système horaire de 24 heures.Cette notation, créée en 1988, est particulièrement destinée à éviter tout risque de confusion dans les communications internationales due au grand nombre de notations … links to the author: (But humans in the US might not recognize 23.06.98 as a date You might The first edition of the ISO 8601 standard was published in 1988. This document specifies representations of dates of the Gregorian calendar and times based on the 24-hour clock, as well as composite elements of them, as character strings for use in information interchange It has been superseded by a second edition in 2000 and by the current third edition published on 3 December 2004.ISO 2014 was the standard that originally introduced the all-numeric date notation in most-to-least-significant order [YYYY]-[MM]-[DD]. All the way back in 1988, the International Standards Organization (ISO) decided, for obvious reasons, that these country-specific all-numeric date formats had to go. In Europe, it's 23.06.98 or perhaps 98/06/23.