diff --git a/models/acc_enedis_cdc.py b/models/acc_enedis_cdc.py
index 23611d713e03bb75714ad5236cdd5d50eafe16fb..0cc19c6d7ff8ffb99a2b7db8498949296dd6af0b 100644
--- a/models/acc_enedis_cdc.py
+++ b/models/acc_enedis_cdc.py
@@ -60,7 +60,7 @@ class AccEnedisCdc(models.Model):
         res = super()._read_group_process_groupby(gb, query)
         if self._context.get("portal_acc_curves"):
             if res["type"] == "datetime":
-                res["display_format"] = "dd/MM/YYYY HH:mm"
+                res["display_format"] = "dd/MM/yyyy HH:mm"
             if initial_gb == "date_slot:minute":
                 res["groupby"] = res["groupby"].replace("hour", "minute")
                 res["interval"] = relativedelta(minutes=30)