diff --git a/backend/src/appointment/controller/calendar.py b/backend/src/appointment/controller/calendar.py
index 4b981ed64..5cbce6521 100644
--- a/backend/src/appointment/controller/calendar.py
+++ b/backend/src/appointment/controller/calendar.py
@@ -319,12 +319,17 @@ def list_events(self, start, end):
             # Mark tentative events
             tentative = status == "tentative"
 
+            title = e.vobject_instance.vevent.summary.value
+            start = e.vobject_instance.vevent.dtstart.value
+            # get_duration grabs either end or duration into a timedelta
+            end = start + e.get_duration()
+
             events.append(
                 schemas.Event(
-                    title=e.vobject_instance.vevent.summary.value,
-                    start=e.vobject_instance.vevent.dtstart.value,
-                    end=e.vobject_instance.vevent.dtend.value,
-                    all_day=not isinstance(e.vobject_instance.vevent.dtstart.value, datetime),
+                    title=title,
+                    start=start,
+                    end=end,
+                    all_day=not isinstance(start, datetime),
                     tentative=tentative,
                     description=e.icalendar_component["description"] if "description" in e.icalendar_component else "",
                 )