title: Getting current user timezone
body: <p>I have been using <code>Session.getTimeZone()</code> to get the current user's timezone. I just noticed it has been <a href="https://developers.google.com/apps-script/reference/base/session#getTimeZone()" rel="noreferrer">deprecated</a>, and I can't see anything that replicates this functionality. My users are located all over the US and dates/times should be formatted accordingly. How can I get the current user's timezone and not that of the script/owner?</p>
  
  <p>The project in question is a standalone script.</p>