diff --git a/admin_manual/configuration_user/user_auth_ldap.rst b/admin_manual/configuration_user/user_auth_ldap.rst
index affcb2781c0..a8995afb71a 100644
--- a/admin_manual/configuration_user/user_auth_ldap.rst
+++ b/admin_manual/configuration_user/user_auth_ldap.rst
@@ -549,6 +549,14 @@ Biography Field:
   Multi line value with unix LF line ending.
   Windows CRLF and Macintosh CR line endings will be replaced with unix LF line ending.
 
+Birthdate Field:
+  The LDAP attribute holding the user's date of birth.
+  Allowed formats:
+
+  * `LDAP GeneralizedTime <https://ldapwiki.com/wiki/Wiki.jsp?page=GeneralizedTime>`_
+  * ``YYYY-MM-DD``
+  * ``YYYYMMDD``
+
 Expert settings
 ---------------
 
diff --git a/admin_manual/images/ldap-advanced-4-attributes.png b/admin_manual/images/ldap-advanced-4-attributes.png
index 61bf840f2a3..f88902b6d6c 100644
Binary files a/admin_manual/images/ldap-advanced-4-attributes.png and b/admin_manual/images/ldap-advanced-4-attributes.png differ