Find timezone informatation on bottom of the page.

def _get_timezone(self, root):
        """Find timezone informatation on bottom of the page."""
        tz_str = root.xpath('//div[@class="smallfont" and @align="center"]')[0].text
        hours = int(self._tz_re.search(tz_str).group(1))
        return tzoffset(tz_str, hours * 60)