iso-8601
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ISO 8601
The International Standards Organisation's standard, number 8601 is an international standard for date and time representations. It is used for all date-time representations in microformats.
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Overview
For a plain-language overview of ISO 8601, we recommend the ISO 8601 summary by Markus Kuhn (http://www.cl.cam.ac.uk/~mgk25/iso-time.html).
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Microformats
Microformats using ISO8601 include:
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RFC 3339
RFC 3339 defines a profile of ISO 8601 for the use in Internet protocols and standards.
- It explicitly excludes durations and dates before the common era (http://en.wikipedia.org/wiki/Common_era).
- The more complex formats like week numbers and ordinal day are not permitted (see RFC 3339, section 5.6).
Microformats SHOULD use RFC 3339.
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Issues
- How should dates before the common era be marked up? Andy Mabbett
- If a web page is created or edited by a non-technical human, it is unfriendly to expect them to work in ISO date format. Charles Belov
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See also
- ISO 8601 on Wikipedia (http://en.wikipedia.org/wiki/ISO_8601)
- ISO 8601:2004(E) from ISO (http://isotc.iso.org/livelink/livelink/4021199/ISO_8601_2004_E.zip?func=doc.Fetch&nodeid=4021199) (zip-pdf, 228KB)
- Summary of 8601 by ISO (http://www.iso.org/iso/en/prods-services/popstds/datesandtime.html)
- Technical Committee ISO/TC 154 (http://isotc.iso.org/livelink/livelink/fetch/2000/2122/138351/138352/customview.html?func=ll&objId=138352&objAction=browse&sort=name), Processes, data elements and documents in commerce, industry and administration.
- The Mathematics of the ISO 8601 Calendar (http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm)
- Current date in week date and ordinal date format (http://www.personal.ecu.edu/mccartyr/isowdcal.html)
- ISO 8601 at the Open Directory Project (http://www.dmoz.org/Science/Reference/Standards/Individual_Standards/ISO_8601/)
- W3C Specification about UTC Date and Time (http://www.w3.org/TR/NOTE-datetime) and IETF Internet standard RFC 3339, based on ISO 8601
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