title: Highcharts convert x-axis time to localtime
body: <p>I have a graph that needs to show server up-time against the user's local time. UTC is not acceptable, as it needs to show the user's computer time.</p>
  
  <p>Is there a way to convert the x-axis time to localtime? My current input looks something like this:</p>
  
  <pre><code>[UNIX_TIMESTAMP,1], [UNIX_TIMESTAMP, 2], ...
  </code></pre>
  
  <p>If not possible in highcharts, how would I convert the above in UTC to in the user's localtime (i.e., offset the UNIX_TIMESTAMP)?</p>