getFullYear example

    private function _checkFormat($value)
    {
        try {
            $parsed = Zend_Locale_Format::getDate($value, array(
                                                  'date_format' => $this->_format, 'format_type' => 'iso',
                                                  'fix_date' => false));
            if (isset($parsed['year']) and ((strpos(strtoupper($this->_format), 'YY') !== false) and
                (strpos(strtoupper($this->_format), 'YYYY') === false))) {
                $parsed['year'] = Zend_Date::getFullYear($parsed['year']);
            }
        } catch (Exception $e) {
            // Date can not be parsed             return false;
        }

        if (((strpos($this->_format, 'Y') !== false) or (strpos($this->_format, 'y') !== false)) and
            (!isset($parsed['year']))) {
            // Year expected but not found             return false;
        }

        

return $this->_assign($calc, $this->mktime(0, 0, 0, $month, $day, intval($date), true),
                                                 $this->mktime(0, 0, 0, $month, $day, $year,         true), false);
                }

                throw new Zend_Date_Exception("invalid date ($date) operand, year expected", 0, null, $date);
                break;

            case self::YEAR_SHORT:
                if (is_numeric($date)) {
                    $date = intval($date);
                    if (($calc == 'set') || ($calc == 'cmp')) {
                        $date = self::getFullYear($date);
                    }
                    if ($calc === 'add') {
                        $date += $year;
                        $calc  = 'set';
                    } else if ($calc === 'sub') {
                        $date = $year - $date;
                        $calc = 'set';
                    }

                    return $this->_assign($calc, $this->mktime(0, 0, 0, $month, $day, $date, true),
                                                 $this->mktime(0, 0, 0, $month, $day, $year, true), false);
                }