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.

WeekNumber Calculation Explanation.

Changing your operating system's default date format to use four-digit years - University of California at Berkeley.

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.

Setting up your PC to use the Year-Month-Day date format. Instructions are for Windows 95, but are easily adapted for later versions.

A proposal to use the ISO date format for Internet applications - by Chris Newman.

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.

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].

Windows date and time locale tables sorted both by country order and by definition order - by Peter J Haas in Germany.

Discussion about the use and misuse of various date formats - Intelligent Enterprise Magazine - Celko.

Here's some code that generates the weeknumber for a given date in accordance with ISO standard 8601:1988 (European Standard EN 28601).

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.

A list of countries around the world that have adopted the ISO 8601 standard, also lists equivalent national standards numbers where applicable.

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.

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.

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.

A short introduction to the ISO 8601 format.

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.

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.

A simple introduction to ISO 8601 date and time formats - University of Wellington in New Zealand.

A short description, and guide to usage, of the ISO 8601 format, with some links to further resources.

An algorithm for converting Gregorian Calendar Dates to the ISO 8601 Week Date format (Y2K Compliant).

by Clive D.W. Feather.

Mac OS X Public Beta: How to set the Date and Time to the ISO 8601:1988 Standard.

A private site about the advantages of using ISO 8601-style dates.

A problem set for computer studies students involving programming using the ISO 8601 date format.

Useful information about date and time - by M. Davis.

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.

[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.

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.

Free source code and tutorial for a Gregorian Date To ISO Date Converter for Windows.

Discussion of formats for expressing dates, with particular reference to the ISO 8601 date format - by Peter Meyer.

A calendar of weeks based on the ISO 8601 week notation - convert any date into week number and day number.

A tour of the many date and time handling modules on the CPAN - by Dave Rolsky.

A comprehensive document covering how week numbers are calculated using the ISO 8601 calendar system. Includes links to many further resources.

Describes Year 2000 fixes for computer systems, mainly based on using the ISO 8601 standard for dates.

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.

How and why to use international date format in your document - from the W3C QA section.

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.

ISO 8601 Dates: What they are and why they're good - University of Illinois at Chicago in the USA.

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.

Defines a profile of ISO 8601 referenced by the W3C HTML recommendation.

Discussion of date formats for internationalisation.

How to calculate absolute week numbers, Excel week numbers and ISO week numbers (with Formula and VBA). Links to other ISO 8601 related materials.

How to write web sites that can be understood world wide - including ways to make dates unambiguous to all readers.

K-State Year 2000 Research Resources - Indepth: International date notation standards.