title: Convert timestamp in UTC to timestamptz
body: <p>How do I convert a <code>timestamp</code> that is in UTC to <code>timestamptz</code>?</p>
  
  <p>If my local time zone is GMT-1 and I run:</p>
  
  <p><code>select '2017-01-01 00:00:00'::timestamptz</code></p>
  
  <p>I get:</p>
  
  <p><code>2017-01-01 00:00:00-01</code></p>
  
  <p>but I want:</p>
  
  <p><code>2017-01-01 01:00:00-01</code></p>