diff --git a/app/scodoc/sco_edt_cal.py b/app/scodoc/sco_edt_cal.py
index e8ba3110e..66d0e5cc7 100644
--- a/app/scodoc/sco_edt_cal.py
+++ b/app/scodoc/sco_edt_cal.py
@@ -139,7 +139,7 @@ def formsemestre_edt_dict(formsemestre: FormSemestre) -> list[dict]:
                                 scodoc_dept=g.scodoc_dept,
                                 formsemestre_id=formsemestre.id,
                                 moduleimpl_id=modimpl.id,
-                                jour = event.decoded("dtstart").isoformat(),
+                                jour = event.decoded("dtstart").date().isoformat(),
                                 group_ids=group.id,
                         )}">absences</a>
             </div>"""