title: Calculating a time duration with Joda-Time
body: <p>I'm trying to use Joda-Time in order to know time durations between two points in time, where each point is given in its own local timezone.</p>
  
  <p>E.g. :</p>
  
  <pre><code>DateTime ny = new DateTime(2011, 2, 2, 7, 0, 0, 0, DateTimeZone.forID("America/New_York"));
  DateTime la = new DateTime(2011, 2, 3, 10, 15, 0, 0, DateTimeZone.forID("America/Los_Angeles"));
  DateTime utc1 = ny.withZone(DateTimeZone.UTC);
  DateTime utc2 = la.withZone(DateTimeZone.UTC);        
  Period period = new Period(utc1, utc2);
  </code></pre>
  
  <p>Now, I wish to know if this takes into account day light savings and leap years...
  Also, is the use of 'Period' the correct Joda-Time way to achieve this?
  Thanks ;)</p>