title: Get the Olson TZ name for the local timezone?
body: <p>How do I get the <a href="http://en.wikipedia.org/wiki/Tz_database#Names_of_time_zones">Olson timezone name</a> (such as <code>Australia/Sydney</code>) corresponding to the value given by C's <a href="http://docs.python.org/py3k/library/time.html#time.localtime"><code>localtime</code></a> call?</p>
  
  <p>This is the value overridden via <code>TZ</code>, by symlinking <code>/etc/localtime</code>, or setting a <code>TIMEZONE</code> variable in time-related system configuration files.</p>