custom #_EVENTDATES

add_filter('em_event_output_placeholder','my_em_placeholder_mod_eventdates',1,3);
function my_em_placeholder_mod_eventdates($replace, $EM_Event, $result){
	if ( $result == '#_EVENTDATES' ) {
		if( $EM_Event->event_start_date != $EM_Event->event_end_date){
			$replace = date_i18n('d M Y', $EM_Event->start).' - '. date_i18n('d M Y', $EM_Event->end);
		}else{
			$replace = date_i18n('d M Y', $EM_Event->start);
		}
	}
	return $replace;
}