title: moment.js specific format with timezone
body: <p>I'm trying to both parse and format a date with the format given to me by my server guys as</p>
  
  <pre><code>yyyy-MM-dd,HH:mm:ss.sssZ
  2014-05-09,09:00:00.000-0400
  </code></pre>
  
  <p>Using <a href="http://momentjs.com/" rel="nofollow">moment.js</a>, I can parse a provided date via</p>
  
  <pre><code>moment(date, "YYYY-MM-DD,HH:mm:ss.sssZ")
  </code></pre>
  
  <p>This seems to work okay, however if I were to add <code>.format("YYYY-MM-DD,HH:mm:ss.sssZ")</code> I get:</p>
  
  <pre><code>2014-04-30,09:00:00.000-04:00 
  </code></pre>
  
  <p>For the most part this is okay, but notice the colon in the timezone spot.  It should be <code>-0400</code>, <em>not</em> <code>-04:00</code>.  I can easily strip off the colon, but before I resort to that, is there any other format string I should be using for parsing and formatting the dates?</p>
  
  <p>I've also tried including <a href="http://momentjs.com/timezone/" rel="nofollow">moment-timezone.js</a>, but this doesn't make any difference.</p>