title: Time zone storage in data type "timestamp with time zone"
body: <p>In PostgreSQL, the data types <code>timestamp</code> and <code>timestamp with timezone</code> both use 8 bytes.</p>
  
  <p><strong>My questions are:</strong></p>
  
  <ol>
  <li>What format is used to store date &amp; time in a timestamp?</li>
  <li>How is the time zone information stored in the <code>timestamp with timezone</code>
  type, and how is it parsed later when reading the type?</li>
  </ol>