Horde_Date_Recurrence::_formatExceptionDate PHP Method

    protected function _formatExceptionDate($date, $format)
    {
        if (!preg_match('/(\\d{4})(\\d{2})(\\d{2})/', $date, $match)) {
            return '';
        }
        $horde_date = new Horde_Date(array('year' => $match[1], 'month' => $match[2], 'mday' => $match[3]));
        return $horde_date->strftime($format);
    }