diff --git a/app/scodoc/sco_edt_cal.py b/app/scodoc/sco_edt_cal.py
index 91e3d6561..e81ac838e 100644
--- a/app/scodoc/sco_edt_cal.py
+++ b/app/scodoc/sco_edt_cal.py
@@ -42,6 +42,7 @@ from flask import g, url_for
 from app import log
 from app.auth.models import User
 from app.models import FormSemestre, GroupDescr, ModuleImpl, ScoDocSiteConfig
+from app.scodoc.html_sidebar import retreive_formsemestre_from_request
 from app.scodoc.sco_exceptions import ScoValueError
 import app.scodoc.sco_utils as scu
 
@@ -222,18 +223,23 @@ def translate_calendar(
         if group and group_ids_set and group.id not in group_ids_set:
             continue  # ignore cet évènement
         modimpl: ModuleImpl | bool = event["modimpl"]
-        url_abs = (
-            url_for(
-                "assiduites.signal_assiduites_group",
-                scodoc_dept=g.scodoc_dept,
-                group_ids=group.id,
-                heure_deb=event["heure_deb"],
-                heure_fin=event["heure_fin"],
-                moduleimpl_id=modimpl.id,
-                day=event["jour"],
-            )
-            if modimpl and group
-            else None
+        params = {
+            "scodoc_dept": g.scodoc_dept,
+            "group_ids": group.id,
+            "heure_deb": event["heure_deb"].replace("h", ":") if "h" in event["heure_deb"] else event["heure_deb"],
+            "heure_fin": event["heure_fin"].replace("h", ":") if "h" in event["heure_fin"] else event["heure_fin"],
+            "day": event["jour"]
+        }
+        if modimpl:
+             params["moduleimpl_id"] = modimpl.id
+        else:
+             params["formsemestre_id"] = retreive_formsemestre_from_request()
+
+        # Génération de l'URL si group et l'un des deux (modimpl ou formsem) sont définis
+        url_abs = (    
+            url_for("assiduites.signal_assiduites_group", **params)
+              if group
+              else None
         )
         match modimpl:
             case False:  # EDT non configuré