ISO 8601: a standardized date format

This page created: 2005-06g-17 | Content last updated: 2005-06g-17 | Author: Lyberty

ISO 8601 (a recommended standard from the Internationl Organization for Standardization)
defines the formatting of the date as follows:

YYYY-MM-DD

where

YYYY indicates a 4 digit year,

MM indicates a 2 digit month (with a leading zero for months 1 through 9, i.e. January through September), and

DD indicates a 2 digit date/day (with a leading zero for days 1 through 9).

Note: As of June 2005, the current version
of the Recommended Standard "ISO 8601"
is "ISO 8601:2004".

Sample application:

Use of the ISO 8601 date format for web pages (HTML); metadata format about the page.

--------------------------------------------------------------

   <meta name="created" content="2005-06-17"> <meta name="modified" content="2005-06-17"> 

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See also: W3C-DTF / [W3CDTF] - the "Date/Time Format" of the W3C;
a.k.a "W3C Encoding rules for dates and times - a profile based on ISO 8601"
-> human readable format (English)

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Alternatives defined in the DC Schema:

"Available"; "Issued" ; etc.

For example:


  <!-- 'issued' = Date resource was made available, e.g. web page published. -->


   

  

    <dcterms:issued>2000-07-11</dcterms:issued>
  


  <!-- 'modified' = Date resource was last updated or changed. -->



	
    <dcterms:modified>2002-06-15</dcterms:modified>

HTML Formatted Definitions: http://www.dublincore.org/documents/dces/
XML DTD: http://dublincore.org/2005/06/13/dcq#modified

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Further information about date/time formatting, including history and alternate or supplemental approches: ./date_format.html

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DTD Sample:



  - <rdf:Property rdf:about="http://purl.org/dc/terms/available">
  
    
        <rdfs:label xml:lang="en-US">Available</rdfs:label> 
    
    
        <rdfs:comment xml:lang="en-US">Date (often a range) that the resource will become or did become available.</rdfs:comment> 
    
    
        <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/terms/" /> 
    
    
        <dcterms:issued>2000-07-11</dcterms:issued> 
    
    
        <dcterms:modified>2002-06-15</dcterms:modified> 
    
    
        <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/date" /> 
    
    
        <dc:type rdf:resource="http://dublincore.org/usage/documents/principles/#element-refinement" /> 
    
    
        <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#available-002" /> 
    
      </rdf:Property>
  


  - <rdf:Property rdf:about="http://purl.org/dc/terms/issued">
  
    
        <rdfs:label xml:lang="en-US">Issued</rdfs:label> 
    
    
        <rdfs:comment xml:lang="en-US">Date of formal issuance (e.g., publication) of the resource.</rdfs:comment> 
    
    
        <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/terms/" /> 
    
    
        <dcterms:issued>2000-07-11</dcterms:issued> 
    
    
        <dcterms:modified>2002-06-15</dcterms:modified> 
    
    
        <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/date" /> 
    
    
        <dc:type rdf:resource="http://dublincore.org/usage/documents/principles/#element-refinement" /> 
    
    
        <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#issued-002" /> 
    
      </rdf:Property>
  


  - <rdf:Property rdf:about="http://purl.org/dc/terms/modified">
  
    
        <rdfs:label xml:lang="en-US">Modified</rdfs:label> 
    
    
        <rdfs:comment xml:lang="en-US">Date on which the resource was changed.</rdfs:comment> 
    
    
        <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/terms/" /> 
    
    
        <dcterms:issued>2000-07-11</dcterms:issued> 
    
    
        <dcterms:modified>2002-06-15</dcterms:modified> 
    
    
        <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/date" /> 
    
    
        <dc:type rdf:resource="http://dublincore.org/usage/documents/principles/#element-refinement" /> 
    
    
        <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#modified-002" /> 
    
      </rdf:Property>