Schema.org的Microdata日期类型

Question

In what format should I represent the DATE type? Schema.org nor Google clarify this.

How does search engines expect it to be? Literal ( April 3rd, 2013 )? 04/03/2013 ?

Any information about which (and why) format is preferred will be appreciated.

Answer 1

In ISO 8601 format!

Source: http://schema.org/Date
Info: http://en.wikipedia.org/wiki/ISO_8601

Answer 2

If you follow microformats.org : http://microformats.org/code/hcalendar/creator

Should be :

<time datetime="2013-07-08">Example Event</time>

Or :

<span class="vevent">
 <span class="summary">The microformats.org site was launched</span>
 on <span class="dtstart">2005-06-20</span> 
 at the Supernova Conference 
 in <span class="location">San Francisco, CA, USA</span>.
</span>

The microformats.org site was launched on 2005-06-20 at the Supernova Conference in San Francisco, CA, USA.

Read more information about microformats: http://microformats.org/wiki/hcalendar