title: Convert same time to different time zone
body: <p>I am trying to convert times to different time zones, but not the way you're thinking. I need to convert a DateTime that is 9am EST to 9am CST on the UTC for example. The timezones are variable so just adding/subtracting hours doesn't seem correct way to do it with NodaTime</p>
  
  <pre><code>Fri, 21 Feb 2014 21:00:00 EST = 1393034400 Epoch Timestamp
  convert to
  Fri, 21 Feb 2014 21:00:00 CST = 1393030800 Epoch Timestamp
  </code></pre>