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Home:   Science:   Reference:   Standards:   Individual Standards:   ISO 8601

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New Date  - http://www.wwmeli.org/newdate/  A private site about the advantages of using ISO 8601-style dates.  W3C Date and Time Formats  - http://www.w3.org/TR/1998/NOTE-datetime-19980827  Defines a profile of ISO 8601 referenced by the W3C HTML recommendation.  International Standard Date and Time Notation  - http://www.cl.cam.ac.uk/~mgk25/iso-time.html  by Markus Kuhn - An introduction to ISO 8601, the YYYY-MM-DD date and the 24-hour time notation, with notes on week numbers and on implementation.  Implementation of the ISO 8601 Standard  - http://www.qsl.net/g1smd/isoimp.htm  A list of countries around the world that have adopted the ISO 8601 standard, also lists equivalent national standards numbers where applicable.  International Date Format Campaign  - http://www.saqqara.demon.co.uk/datefmt.htm  Describes and lists many reasons why the ISO 8601 standard should be more widely adopted in Computing, on the Internet, and in everyday life - by Steve Adams in England.  Discussion About the ISO 8601 Standard  - http://groups.yahoo.com/group/iso8601  About 200 people worldwide, who already use and promote the ISO 8601 Year-Month-Day date format have formed this discussion group. Go here for help and advice, or for general discussion. Message archive can be browsed. If you wish to join in, there are options to participate via the Web-based front-end, or subscribe via email.  ISO 8601 Date and Time - Converting and Implementing  - http://www.pvv.org/~nsaa/ISO8601.html  How to implement the use of the Year-Month-Day Date format in various computer systems - includes some programming examples and the 'Date Format Poll' - by Nikolai Sandved in Norway.  Week Numbers In Excel  - http://www.cpearson.com/excel/weeknum.htm  How to calculate absolute week numbers, Excel week numbers and ISO week numbers (with Formula and VBA). Links to other ISO 8601 related materials.  Various Date and Time Format Miscellany  - http://www.merlyn.demon.co.uk/datefmts.htm  by J R Stockton - Covers written date and time formats, ISO Standard 8601 (with links) and converting to and from Roman Numbers. Discusses reforming American format dates as well as JavaScript and non-text formats.  Using ISO 8601 Dates  - http://www.uic.edu/depts/accc/software/isodates/isocontents.html  ISO 8601 Dates: What they are and why they're good - University of Illinois at Chicago in the USA.  The Best Of Dates, The Worst Of Dates  - http://www.exit109.com/~ghealton/y2k/yrexamples.html  Just because Y2K is over, doesn't mean programmers are done creating date bugs - covers many date and time issues, especially ISO 8601 - by Gilbert Healton.  Date and Time Notation - Macintosh Procedure for ISO 8601 Format  - http://metric1.org/macdtset.htm  Setting up your Mac to use the Year-Month-Day date format. Instructions are for MAC OS 7, but are easily adapted for later versions.  Date and Time Notation - Windows Procedure for ISO 8601 Format  - http://metric1.org/windtset.htm  Setting up your PC to use the Year-Month-Day date format. Instructions are for Windows 95, but are easily adapted for later versions.  The Mathematics of the ISO 8601 Calendar  - http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm  A comprehensive document covering how week numbers are calculated using the ISO 8601 calendar system. Includes links to many further resources.  Date and Time on the Internet - Timestamps  - http://community.roxen.com/developers/idocs/drafts/draft-ietf-impp-datetime-05.html  Document: draft-ietf-impp-datetime-05 - An updated proposal to use a limited subset of ISO-compliant date formats for date stamps on the Internet - by Chris Newman.  Info on ISO 8601, the date and time representation standard  - http://www.cs.tut.fi/~jkorpela/iso8601.html  A short description of and motivation for ISO 8601, the date and time representation standard, with links to more detailed resources - by Jukka Korpela in Finland.  Schema Time Changes (Draft)  - http://www.macchiato.com/unicode/timeIntervals.htm  Useful information about date and time - by M. Davis.  Knowledge Archive Article 60753  - http://karchive.info.apple.com/article.html?orig=til&artnum=60753  Mac OS X Public Beta: How to set the Date and Time to the ISO 8601:1988 Standard.  Dated Material - Is the Y2K Problem Really Over?  - http://www.intelligententerprise.com/000717/celko.shtml?database  Discussion about the use and misuse of various date formats - Intelligent Enterprise Magazine - Celko.  Delphi 32 - Components: Date & Time: Clocks - ISO Week Number (Program Code)  - http://www.delphi32.com/vcl/3136/  Here's some code that generates the weeknumber for a given date in accordance with ISO standard 8601:1988 (European Standard EN 28601).  Year 2000 Readiness - Research Resources - International Date Standard  - http://www.ksu.edu/year2000/research/standard.html  K-State Year 2000 Research Resources - Indepth: International date notation standards.  ISO Week Algorithm  - http://personal.ecu.edu/mccartyr/ISOwdALG.txt  An algorithm for converting Gregorian Calendar Dates to the ISO 8601 Week Date format (Y2K Compliant).  Issues about Date and Time  - http://www.davros.org/c/wg14n764.txt  by Clive D.W. Feather.  ISO 8601 Date/Time Representations  - http://www.mcs.vuw.ac.nz/technical/software/SGML/doc/iso8601/ISO8601.html  A simple introduction to ISO 8601 date and time formats - University of Wellington in New Zealand.  The ISO Week Date Calendar  - http://www.personal.ecu.edu/mccartyr/isowdcal.html  A calendar of weeks based on the ISO 8601 week notation - convert any date into week number and day number.  ISO 8601 - The Right Solution  - http://www.wa.gov.au/tiac/forum/entries/michele/millenniumstuff/solutions.htm  The wonderful thing about the computer industry, it is said, "If you like standards, there are a lot to choose from". Provides useful information and background about date format issues.  54 Weeks in 2000 : Another Y2K Problem!  - http://www.allegro.com/papers/54.html  A short discussion about week numbering, showing how the ISO 8601 standard had fixed a Y2K problem, long before it was noticed in other non-ISO week-numbering schemes.  ISO 8601: the Right Format for Dates  - http://www.uic.edu/depts/accc/software/isodates/index.html  A short description, and guide to usage, of the ISO 8601 format, with some links to further resources.  Standards to be obeyed by the masses: Representing temporal and monetary data on the web  - http://dialspace.dial.pipex.com/town/square/xta78/ISO8601/Knolmayer.pdf  [Text/PDF: 50KB] - A well researched paper into the usage of various Date and Time, and Monetary, formats on the Internet which recommends the widespread adoption of ISO 3166, ISO 4217, and ISO 8601 - by Gerhard Knolmayer.  Date and Time on the Internet: Timestamps  - ftp://ftp.rfc-editor.org/in-notes/rfc3339.txt  RFC 3339 defines a date and time format for use in Internet protocols that is a profile of the ISO 8601 standard for representation of dates and times using the Gregorian calendar - by Graham Klyne and Chris Newman [FTP].  The Y2K Problem, UIC, and You  - http://www.uic.edu/depts/accc/newsletter/adn21/y2kprob.html  Describes Year 2000 fixes for computer systems, mainly based on using the ISO 8601 standard for dates.  Date and Time: Week Numbers  - http://www.pjh2.de/datetime/weeknumber/index.php  Windows date and time locale tables sorted both by country order and by definition order - by Peter J Haas in Germany.  Use ISO 8601 and Drop mm/dd/yy and am/pm  - http://www.geocities.com/jusjih/iso8601.html  Justin JIH, a Taiwanese American, sets out the reasons why adopting the YYYY-MM-DD date format is preferred. Includes useful links to further resources.  The Code Project: C# Programming  - http://www.thecodeproject.com/csharp/GregToISO.asp  Free source code and tutorial for a Gregorian Date To ISO Date Converter for Windows.  Use International Date Format  - http://www.w3.org/QA/Tips/iso-date  How and why to use international date format in your document - from the W3C QA section.  The ISO Date Format  - http://www.hermetic.ch/cal_stud/formats.htm  Discussion of formats for expressing dates, with particular reference to the ISO 8601 date format - by Peter Meyer.  Calculating the ISO week number - by Jan Stout.  - http://www.proesite.com/timex/wkcalc.htm  WeekNumber Calculation Explanation.  W3C I18N Q&A: Date formats  - http://www.w3.org/International/questions/qa-date-format  Discussion of date formats for internationalisation.  Writing for an International Readership  - http://www.betweenborders.com/international/  How to write web sites that can be understood world wide - including ways to make dates unambiguous to all readers.  Date and Time on the Internet  - http://www.hermetic.ch/cal_stud/newman.htm  A proposal to use the ISO date format for Internet applications - by Chris Newman.  Changing Your Operating System's Default Date Format  - http://y2k.berkeley.edu/computers/fixpcs/issues/os-date-format.html  Changing your operating system's default date format to use four-digit years - University of California at Berkeley.  Standards for Representing Dates  - http://y2k.berkeley.edu/computers/fixpcs/issues/date-standards.html  Useful overview and discussion on adopting ISO standards and four-digit year formats as part of Y2K readiness and future-proofing of software - University of California at Berkeley.  UN/ECE Trade Facilitation Recommendation 07  - http://www.unece.org/etrades/unedocs/e_forms/rec_pdf/rec07_1988_inf108.pdf  The United Nations Economic Commission for Europe - Working Party on Facilitation of International Trade Procedures - Recommendation 07 - Numerical Representation of Dates, Time and Periods of Time.  ISO 8601  - http://www.cezwright.com/theWeb/y2k/iso_8601.htm  A short introduction to the ISO 8601 format.  The Many Dates and Times of Perl  - http://www.perl.com/pub/a/2003/03/13/datetime.html  A tour of the many date and time handling modules on the CPAN - by Dave Rolsky.