title: How accurate is automatic detection of device timezone?
body: <p>Was looking at this tutorial here <a href="http://pellepim.bitbucket.org/jstz/" rel="nofollow">http://pellepim.bitbucket.org/jstz/</a> on automatic timezone detection using javaScript which detects the device's time zone setting.</p>
  
  <p>I was wondering if anyone had any idea (ballpark is fine) of how accurate this method is of detecting timezones?</p>
  
  <p>Thanks for your time!  </p>