You can do this by following these steps:
1. Click "Quick Links" at the top of the forum page...
2. In the drop down menu choose "Edit Options" ...
3. Scroll down to "Date & Time Options " and select your time zone.
4. Make sure to click the "save changes" button at the bottom of the page.
*If you can't find the 'edit option' area, from the above steps, just go here: Edit Options
Hope this helps!