title: How to format ActiveSupport::TimeWithZone instance to specified format
body: <p>I have a ActiveSupport::TimeWithZone instance like <code>2014-12-22 05:54:34 UTC</code>, but I only want to keep the date info <code>2014-12-22</code></p>
  
  <p>I tried Rail's <code>to_formatted_s</code>, but it didn't work for me. </p>
  
  <pre><code>&lt;%= item.updated_at.to_formatted_s(:db) %&gt;
  </code></pre>
  
  <p>Which displays: <code>2014-12-22 05:54:34</code></p>