diff --git a/app/templates/assiduites/pages/signal_assiduites_group.j2 b/app/templates/assiduites/pages/signal_assiduites_group.j2
index 73744040..1cab66d9 100644
--- a/app/templates/assiduites/pages/signal_assiduites_group.j2
+++ b/app/templates/assiduites/pages/signal_assiduites_group.j2
@@ -137,6 +137,10 @@
     </fieldset>
     <div style="display: {{'none' if readonly == 'true' else 'block'}};">
     {{timeline|safe}}
+        <div>
+            <button onclick="setPeriodValues(t_start, t_mid)">Matin</button>
+            <button onclick="setPeriodValues(t_mid, t_end)">Après-Midi</button>
+        </div>
     </div>
 
     {% if readonly == "false" %}
diff --git a/app/templates/assiduites/widgets/timeline.j2 b/app/templates/assiduites/widgets/timeline.j2
index 5ff68ee4..09b8878a 100644
--- a/app/templates/assiduites/widgets/timeline.j2
+++ b/app/templates/assiduites/widgets/timeline.j2
@@ -17,6 +17,7 @@
     const timelineContainer = document.querySelector(".timeline-container");
     const periodTimeLine = document.querySelector(".period");
     const t_start = {{ t_start }};
+    const t_mid = {{ t_mid }};
     const t_end = {{ t_end }};
 
     const tick_time = 60 / {{ tick_time }};
diff --git a/app/views/assiduites.py b/app/views/assiduites.py
index 4da2c2d9..44e54c43 100644
--- a/app/views/assiduites.py
+++ b/app/views/assiduites.py
@@ -2331,6 +2331,7 @@ def _timeline(formsemestre_id: int = None, heures=None) -> str:
     return render_template(
         "assiduites/widgets/timeline.j2",
         t_start=ScoDocSiteConfig.assi_get_rounded_time("assi_morning_time", "08:00:00"),
+        t_mid=ScoDocSiteConfig.assi_get_rounded_time("assi_lunch_time", "13:00:00"),
         t_end=ScoDocSiteConfig.assi_get_rounded_time("assi_afternoon_time", "18:00:00"),
         tick_time=ScoDocSiteConfig.get("assi_tick_time", 15),
         periode_defaut=sco_preferences.get_preference(