International Standard Date and Time Notation Information on the standard notation that helps to avoid confusion in international communication caused by the many different national notations.
http://www.cl.cam.ac.uk/~mgk25/iso-time.html More Info
W3C Date and Time Formats Defines a profile of ISO 8601, the International Standard for the representation of dates and times.
http://www.w3.org/TR/1998/NOTE-datetime-19980827 More Info