diff --git a/htdocs/core/lib/company.lib.php b/htdocs/core/lib/company.lib.php
index d49538f41dc..a29c22cbcf7 100644
--- a/htdocs/core/lib/company.lib.php
+++ b/htdocs/core/lib/company.lib.php
@@ -957,7 +957,13 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 	$search_poste   = GETPOST("search_poste", 'alpha');
 	$search_note_private = GETPOST('search_note_private', 'alphanohtml');
 	$search_roles = GETPOST("search_roles", 'array');
+	$search_birthday_dtstart = GETPOST("search_birthday_dtstart", 'alpha');
+	$search_birthday_dtend = GETPOST("search_birthday_dtend", 'alpha');
 
+	if ($search_birthday_dtstart != '' || $search_birthday_dtend != '') {
+		$search_birthday_dtstart = dol_mktime(0, 0, 0, GETPOST('search_birthday_dtstartmonth', 'int'), GETPOST('search_birthday_dtstartday', 'int'), GETPOST('search_birthday_dtstartyear', 'int'));
+		$search_birthday_dtend = dol_mktime(23, 59, 59, GETPOST('search_birthday_dtendmonth', 'int'), GETPOST('search_birthday_dtendday', 'int'), GETPOST('search_birthday_dtendyear', 'int'));
+	}
 	$socialnetworks = getArrayOfSocialNetworks();
 
 	$searchAddressPhoneDBFields = array(
@@ -1007,6 +1013,7 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 		'address'   =>array('type'=>'varchar(128)', 'label'=>'Address', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>3, 'index'=>1, 'position'=>30),
 		'note_private' =>array('type'=>'text', 'label'=>'NotePrivate', 'enabled'=>(!getDolGlobalInt('MAIN_LIST_HIDE_PRIVATE_NOTES')), 'visible'=>3, 'position'=>35),
 		'role'      =>array('type'=>'checkbox', 'label'=>'Role', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>4, 'index'=>1, 'position'=>40),
+		'birthday' 	=>array('type'=>'date', 'label'=>'Birthday', 'enabled'=>1, 'visible'=>-1, 'notnull'=> 0, 'position'=>45),
 		'statut'    =>array('type'=>'integer', 'label'=>'Status', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'default'=>0, 'index'=>1, 'position'=>50, 'arrayofkeyval'=>array(0=>$contactstatic->LibStatut(0, 1), 1=>$contactstatic->LibStatut(1, 1))),
 	);
 
@@ -1018,6 +1025,7 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 		't.address'=>array('label'=>(empty($conf->dol_optimize_smallscreen) ? $langs->trans("Address").' / '.$langs->trans("Phone").' / '.$langs->trans("Email") : $langs->trans("Address")), 'checked'=>1, 'position'=>30),
 		't.note_private' => array('label' => 'NotePrivate', 'checked' => 0, 'position'=>35),
 		'sc.role'=>array('label'=>"ContactByDefaultFor", 'checked'=>1, 'position'=>40),
+		't.birthday'=>array('label'=>"Birthday", 'checked'=>0, 'position'=>45),
 		't.statut'=>array('label'=>"Status", 'checked'=>1, 'position'=>50, 'class'=>'center'),
 	);
 	// Extra fields
@@ -1052,6 +1060,8 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 		$search_address = '';
 		$search_poste = '';
 		$search_note_private = '';
+		$search_birthday_dtstart = '';
+		$search_birthday_dtend = '';
 		$search = array();
 		$search_array_options = array();
 
@@ -1111,6 +1121,9 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 	if ($search_note_private != '') {
 		$param .= '&search_note_private='.urlencode($search_note_private);
 	}
+	if ($search_birthday != '') {
+		$param .= '&search_birthday='.urlencode($search_birthday);
+	}
 	if ($optioncss != '') {
 		$param .= '&optioncss='.urlencode($optioncss);
 	}
@@ -1120,7 +1133,7 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 	include DOL_DOCUMENT_ROOT.'/core/tpl/extrafields_list_search_param.tpl.php';
 
 	$sql = "SELECT t.rowid, t.entity, t.lastname, t.firstname, t.fk_pays as country_id, t.civility, t.poste, t.phone as phone_pro, t.phone_mobile, t.phone_perso, t.fax, t.email, t.socialnetworks, t.statut, t.photo,";
-	$sql .= " t.civility as civility_id, t.address, t.zip, t.town";
+	$sql .= " t.civility as civility_id, t.address, t.zip, t.town, t.birthday";
 	$sql .= ", t.note_private";
 	$sql .= " FROM ".MAIN_DB_PREFIX."socpeople as t";
 	$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."socpeople_extrafields as ef on (t.rowid = ef.fk_object)";
@@ -1144,6 +1157,12 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 	if ($search_note_private) {
 		$sql .= natural_search('t.note_private', $search_note_private);
 	}
+	if ($search_birthday_dtstart != '') {
+		$sql .= " AND t.birthday >= '".$db->idate($search_birthday_dtstart)."'";
+	}
+	if ($search_birthday_dtend != '') {
+		$sql .= " AND t.birthday <= '".$db->idate($search_birthday_dtend)."'";
+	}
 	if (count($search_roles) > 0) {
 		$sql .= " AND t.rowid IN (SELECT sc.fk_socpeople FROM ".MAIN_DB_PREFIX."societe_contacts as sc WHERE sc.fk_c_type_contact IN (".$db->sanitize(implode(',', $search_roles))."))";
 	}
@@ -1188,6 +1207,13 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 				print $form->selectarray('search_status', array('-1'=>'', '0'=>$contactstatic->LibStatut(0, 1), '1'=>$contactstatic->LibStatut(1, 1)), $search_status, 0, 0, 0, '', 0, 0, 0, '', 'onrightofpage');
 			} elseif (in_array($key, array('role'))) {
 				print $formcompany->showRoles("search_roles", $contactstatic, 'edit', $search_roles, 'minwidth200 maxwidth300');
+			} elseif (in_array($key, array('birthday'))) {
+				print '<div class="nowrap">';
+				print $form->selectDate($search_birthday_dtstart ? $search_birthday_dtstart : '', "search_birthday_dtstart", 0, 0, 1, '', 1, 0, 0, '', '', '', '', 1, '', $langs->trans('From'));
+				print '</div>';
+				print '<div class="nowrap">';
+				print $form->selectDate($search_birthday_dtend ? $search_birthday_dtend : '', "search_birthday_dtend", 0, 0, 1, '', 1, 0, 0, '', '', '', '', 1, '', $langs->trans('to'));
+				print '</div>';
 			} else {
 				print '<input type="text" class="flat maxwidth75" name="search_'.$key.'" value="'.(!empty($search[$key]) ? dol_escape_htmltag($search[$key]) : '').'">';
 			}
@@ -1342,6 +1368,13 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 				print '</td>';
 			}
 
+			// Birthday
+			if (!empty($arrayfields['t.birthday']['checked'])) {
+				print '<td>';
+				print dol_print_date($obj->birthday);
+				print '</td>';
+			}
+
 			// Status
 			if (!empty($arrayfields['t.statut']['checked'])) {
 				print '<td class="center">'.$contactstatic->getLibStatut(5).'</td>';
@@ -1384,7 +1417,7 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 			$i++;
 		}
 	} else {
-		$colspan = 1;
+		$colspan = 2;
 		foreach ($arrayfields as $key => $val) {
 			if (!empty($val['checked'])) {
 				$colspan++;