diff --git a/start.php b/start.php
index 26b309c..2b1e2a0 100644
--- a/start.php
+++ b/start.php
@@ -84,7 +84,13 @@
         $user->name = $elgg_user['name'];
         $user->email = $elgg_user['email'];
         $user->ldapDN = $elgg_user['ldapDN'];
-        $user->birthday = $elgg_user['birthday'];
+        $bday = strptime($elgg_user['birthday'], '%d/%m/%Y');
+        if ($bday != FALSE) {
+                $user->birthday = mktime(0,0,0,
+                        $bday['tm_mday'],
+                        $bday['tm_mon'],
+                        $bday['tm_year']);
+        }
         $user->ircem = $elgg_user['ircem'];
         $user->urssaf = $elgg_user['urssaf'];
         $user->address = $elgg_user['address'];