function set_timezone() {
            $timezone_format = _x('Y-m-d G:i:s', 'timezone date format');
            $current_offset = get_option('gmt_offset');
            $tzstring = get_option('timezone_string');
            $check_zone_info = true;
            if (false !== strpos($tzstring,'Etc/GMT')) { $tzstring = ''; }

            if (empty($tzstring)) {
                $check_zone_info = false;
                if (0 == $current_offset) {
                    $tzstring = 'UTC+0';
                } elseif ($current_offset < 0) {
                    $tzstring = 'UTC' . $current_offset;
                } else {
                    $tzstring = 'UTC+' . $current_offset;
                }
            }

            @putenv("TZ=" . $tzstring);
            @ini_set('date.timezone', $tzstring);

            if (function_exists('date_default_timezone_set')) {
                @date_default_timezone_set($tzstring);
            }
        }