diff --git a/app/scodoc/notesdb.py b/app/scodoc/notesdb.py
index 5aa5c91b..0f72cd01 100644
--- a/app/scodoc/notesdb.py
+++ b/app/scodoc/notesdb.py
@@ -480,7 +480,7 @@ def DateDMYtoISO(dmy: str, null_is_empty=False) -> str | None:
         try:
             dt = datetime.datetime.fromisoformat(dmy)
         except ValueError as exc:
-            raise ValueError(f'Date (j/m/a or iso) invalide: "{dmy}"') from exc
+            raise ScoValueError(f'Date (j/m/a or iso) invalide: "{dmy}"') from exc
     return dt.date().isoformat()
 
 
diff --git a/app/views/scolar.py b/app/views/scolar.py
index f20e24c5..6cb7a357 100644
--- a/app/views/scolar.py
+++ b/app/views/scolar.py
@@ -1365,6 +1365,15 @@ def etudident_edit_form():
     return _etudident_create_or_edit_form(edit=True)
 
 
+def _validate_date_naissance(val: str, field) -> bool:
+    "vrai si date saisie valide"
+    try:
+        date_naissance = scu.convert_fr_date(val)
+    except ScoValueError:
+        return False
+    return date_naissance < datetime.datetime.now()
+
+
 def _etudident_create_or_edit_form(edit):
     "Le formulaire HTML"
     H = [html_sco_header.sco_header()]
@@ -1506,8 +1515,7 @@ def _etudident_create_or_edit_form(edit):
                 "title": "Date de naissance",
                 "input_type": "date",
                 "explanation": "j/m/a",
-                "validator": lambda val, _: DMY_REGEXP.match(val)
-                and (ndb.DateDMYtoISO(val) < datetime.date.today().isoformat()),
+                "validator": _validate_date_naissance,
             },
         ),
         ("lieu_naissance", {"title": "Lieu de naissance", "size": 32}),
@@ -1779,7 +1787,7 @@ def _etudident_create_or_edit_form(edit):
                 + homonyms_html
                 + F
             )
-
+        tf[2]["date_naissance"] = scu.convert_fr_date(tf[2]["date_naissance"])
         if not edit:
             etud = sco_etud.create_etud(cnx, args=tf[2])
             etudid = etud["etudid"]