diff --git a/htdocs/core/boxes/box_birthdays.php b/htdocs/core/boxes/box_birthdays.php
index 945552753ea..b84991d7be7 100644
--- a/htdocs/core/boxes/box_birthdays.php
+++ b/htdocs/core/boxes/box_birthdays.php
@@ -97,7 +97,7 @@ class box_birthdays extends ModeleBoxes
 			$sql .= " AND u.statut = 1";
 			$sql .= dolSqlDateFilter('u.dateemployment', 0, $tmparray['mon'], 0);
 
-			$sql .= " ORDER BY DAY(datea) ASC";
+			$sql .= " ORDER BY datea ASC";
 
 			dol_syslog(get_class($this)."::loadBox", LOG_DEBUG);
 			$result = $this->db->query($sql);
diff --git a/htdocs/core/boxes/box_birthdays_members.php b/htdocs/core/boxes/box_birthdays_members.php
index fc8dc4c6745..222821128e3 100644
--- a/htdocs/core/boxes/box_birthdays_members.php
+++ b/htdocs/core/boxes/box_birthdays_members.php
@@ -90,7 +90,7 @@ class box_birthdays_members extends ModeleBoxes
 			$sql .= " WHERE u.entity IN (".getEntity('adherent').")";
 			$sql .= " AND u.statut = ".Adherent::STATUS_VALIDATED;
 			$sql .= dolSqlDateFilter('u.birth', 0, $tmparray['mon'], 0);
-			$sql .= " ORDER BY DAY(u.birth) ASC";
+			$sql .= " ORDER BY u.birth ASC";
 			$sql .= $this->db->plimit($max, 0);
 
 			dol_syslog(get_class($this)."::loadBox", LOG_DEBUG);