diff --git a/app/models/evaluations.py b/app/models/evaluations.py
index ef2a628879..5b0960ba02 100644
--- a/app/models/evaluations.py
+++ b/app/models/evaluations.py
@@ -46,16 +46,23 @@ class Evaluation(db.Model):
     def __repr__(self):
         return f"""<Evaluation {self.id} {self.jour.isoformat() if self.jour else ''} "{self.description[:16] if self.description else ''}">"""
 
-    def to_dict(self):
+    def to_dict(self) -> dict:
+        "Représentation dict, pour json"
         e = dict(self.__dict__)
         e.pop("_sa_instance_state", None)
         # ScoDoc7 output_formators
         e["evaluation_id"] = self.id
-        e["jour"] = ndb.DateISOtoDMY(e["jour"])
-        e["date_debut"] = datetime.datetime.combine(
-            self.jour, self.heure_debut
-        ).isoformat()
-        e["date_fin"] = datetime.datetime.combine(self.jour, self.heure_fin).isoformat()
+        e["jour"] = e["jour"].strftime("%d/%m/%Y") if e["jour"] else ""
+        if self.jour is None:
+            e["date_debut"] = None
+            e["date_fin"] = None
+        else:
+            e["date_debut"] = datetime.datetime.combine(
+                self.jour, self.heure_debut or datetime.time(0, 0)
+            ).isoformat()
+            e["date_fin"] = datetime.datetime.combine(
+                self.jour, self.heure_fin or datetime.time(0, 0)
+            ).isoformat()
         e["numero"] = ndb.int_null_is_zero(e["numero"])
         e["poids"] = self.get_ue_poids_dict()  # { ue_id : poids }
         return evaluation_enrich_dict(e)
diff --git a/sco_version.py b/sco_version.py
index 120447d32f..3222274fa8 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.2.21"
+SCOVERSION = "9.2.22"
 
 SCONAME = "ScoDoc"