diff --git a/htdocs/contact.class.php b/htdocs/contact.class.php
index 0af9830ebec..83e25f7a0f3 100644
--- a/htdocs/contact.class.php
+++ b/htdocs/contact.class.php
@@ -422,7 +422,7 @@ class Contact extends CommonObject
                 $this->priv           = $obj->priv;
                 $this->mail           = $obj->email;
     
-                $this->birthday       = $obj->birthday;
+                $this->birthday       = dolibarr_stringtotime($obj->birthday);
                 $this->birthday_alert = $obj->birthday_alert;
                 $this->note           = $obj->note;
 
diff --git a/htdocs/lib/functions.lib.php b/htdocs/lib/functions.lib.php
index 1a07315f1ac..fe83c66017d 100644
--- a/htdocs/lib/functions.lib.php
+++ b/htdocs/lib/functions.lib.php
@@ -451,8 +451,8 @@ function dolibarr_print_date($time,$format='',$to_gmt=false)
 
 
 /**
- *	\brief  	Retourne une date fabrique depuis une chaine
- *	\param		string			Date formate en chaine
+ *	\brief  	Convert a string date into a TMS date
+ *	\param		string			Date in a string
  *				YYYYMMDD
  *				YYYYMMDDHHMMSS
  *				DD/MM/YY ou DD/MM/YYYY