diff --git a/homeassistant/components/calendar/__init__.py b/homeassistant/components/calendar/__init__.py
index 0f122fea55f..432b6943473 100644
--- a/homeassistant/components/calendar/__init__.py
+++ b/homeassistant/components/calendar/__init__.py
@@ -341,6 +341,8 @@ class CalendarEventView(http.HomeAssistantView):
             [
                 {
                     "summary": event.summary,
+                    "description": event.description,
+                    "location": event.location,
                     "start": _get_api_date(event.start),
                     "end": _get_api_date(event.end),
                 }
diff --git a/homeassistant/components/demo/calendar.py b/homeassistant/components/demo/calendar.py
index 42ec04e42f2..3a8b909bd0c 100644
--- a/homeassistant/components/demo/calendar.py
+++ b/homeassistant/components/demo/calendar.py
@@ -39,6 +39,8 @@ def calendar_data_future() -> CalendarEvent:
         start=one_hour_from_now,
         end=one_hour_from_now + datetime.timedelta(minutes=60),
         summary="Future Event",
+        description="Future Description",
+        location="Future Location",
     )
 
 
@@ -90,6 +92,8 @@ class LegacyDemoCalendar(CalendarEventDevice):
                 ).isoformat()
             },
             "summary": "Future Event",
+            "description": "Future Description",
+            "location": "Future Location",
         }
 
     @property
diff --git a/tests/components/caldav/test_calendar.py b/tests/components/caldav/test_calendar.py
index 2131eebe997..f35fa609e4a 100644
--- a/tests/components/caldav/test_calendar.py
+++ b/tests/components/caldav/test_calendar.py
@@ -937,5 +937,7 @@ async def test_get_events_custom_calendars(hass, calendar, get_api_events):
             "end": {"dateTime": "2017-11-27T10:00:00-08:00"},
             "start": {"dateTime": "2017-11-27T09:00:00-08:00"},
             "summary": "This is a normal event",
+            "location": "Hamburg",
+            "description": "Surprisingly rainy",
         }
     ]
diff --git a/tests/components/calendar/test_init.py b/tests/components/calendar/test_init.py
index 26f9320a196..0a91f58b0b2 100644
--- a/tests/components/calendar/test_init.py
+++ b/tests/components/calendar/test_init.py
@@ -57,3 +57,5 @@ async def test_events_http_api_shim(hass, hass_client):
     assert response.status == HTTPStatus.OK
     events = await response.json()
     assert events[0]["summary"] == "Future Event"
+    assert events[0]["description"] == "Future Description"
+    assert events[0]["location"] == "Future Location"
diff --git a/tests/components/twentemilieu/test_calendar.py b/tests/components/twentemilieu/test_calendar.py
index 0a0f32be212..b9f1dd9247d 100644
--- a/tests/components/twentemilieu/test_calendar.py
+++ b/tests/components/twentemilieu/test_calendar.py
@@ -79,4 +79,6 @@ async def test_api_events(
         "start": {"date": "2022-01-06"},
         "end": {"date": "2022-01-06"},
         "summary": "Christmas Tree Pickup",
+        "description": None,
+        "location": None,
     }