title: Bash: get date and time from another time zone
body: <p><br>
  I would want to get the date and time from another time zone (UTC-4) with a bash command, but I don't want to configure it as the default TZ for the system.
  <br>
  Is there a simple way to do it? 
  <br>
  E.g 1 (current):</p>
  
  <pre><code>$ date
  fri nov  7 13:15:35 UTC 2014
  </code></pre>
  
  <p>E.g 2 (what I need):</p>
  
  <pre><code>$ date (+ some option for UTC-4)
  fri nov  7 09:15:35 UTC 2014
  </code></pre>