function dates_format($sdate, $edate) { $syear = JDate::year($sdate); $eyear = JDate::year($edate); $ret = JDate::date_format($sdate, 'Y m月d日') . " ~ "; if ($syear == $eyear) { $ret .= JDate::date_format($edate, 'm月d日'); } else { $ret .= JDate::date_format($edate, 'Y m月d日'); } return $ret; }