title: UTC to local hour in MATLAB
body: <p>I have this cell array:</p>
  
  <pre><code>    date_hour = '30/07/2012 00:00'
                  '30/07/2012 01:00'
                  '30/07/2012 02:00'
                  '30/07/2012 03:00'
                  '30/07/2012 04:00'
                  '30/07/2012 05:00'
                  '30/07/2012 06:00'
                  '30/07/2012 07:00'
                  '30/07/2012 08:00'
                  '30/07/2012 09:00'
                  '30/07/2012 10:00'
                  '30/07/2012 11:00'
                  '30/07/2012 12:00'
                  '30/07/2012 13:00'
                  '30/07/2012 14:00'
                  '30/07/2012 15:00'
                  '30/07/2012 16:00'
                  '30/07/2012 17:00'
                  '30/07/2012 18:00'
                  '30/07/2012 19:00'
                  '30/07/2012 20:00'
                  '30/07/2012 22:00'
                  '30/07/2012 21:00'
                  '30/07/2012 23:00'
  </code></pre>
  
  <p>The hour is given in UTC. Once local time is -3, how can I convert to local time?</p>