title: How to change the timezone of Oracle SQL Developer / Oracle Data Modeler?
body: <p>Each time I run Oracle SQL Developer or Oracle Data Modeler I receive this error message:</p>
  
  <blockquote>
    <p>ora-01882 "timezone region not found"</p>
  </blockquote>
  
  <p>Digging a this issue, I found that both Oracle SQL Developer and Oracle Data Modeler says that my timezone is <code>Europe/Berlin</code>, which is not listed into the Oracle's system view <code>V$TIMEZONE_NAMES</code>.</p>
  
  <p>So, I need to change the timezone in Oracle SQL Developer (not the database) to match the most similar timezone found in <code>V$TIMEZONE_NAMES</code>.</p>