To change the timezone go to the Setup page and click on Timezone. You’ll then be presented with a page like this:

From the drop-down menu select the geographical area:

Then select your location:

Occasionally a third drop-down menu will appear. If it does, make a further selection.

Once you’ve chosen your new timezone hit the commit button to make the change to HQ. After a short moment your browser will loose connection to the web server; simply wait a second or two and hit your browser’s page reload button.