There have been improvements in the HTML specification that now allow us to better mark up our event information.
The microdata specification now allows us to add attributes to our usual HTML tags, providing detailed information to "machine readers", such as search engines.
<ul>
<li itemscope itemtype="http://data-vocabulary.org/Event">
<time itemprop="startDate" datetime="2011-02-12T12:00-05:00">Feb 12</time>
<a href="/link-to-event.html" itemprop="summary url">This is my event</a>
</li>
</ul>
HTML 5 also introduces the time tag, as show above, to further enhance event markup.