diff --git a/docs/sphinx/examples/demo_notebook.ipynb b/docs/sphinx/examples/demo_notebook.ipynb
index 373a96ab..a6d02b9e 100644
--- a/docs/sphinx/examples/demo_notebook.ipynb
+++ b/docs/sphinx/examples/demo_notebook.ipynb
@@ -4030,7 +4030,7 @@
       "Mappings:\n",
       " capabilities:\n",
       "                   es_field_name  is_source es_dtype                  es_date_format        pd_dtype  is_searchable  is_aggregatable  is_scripted aggregatable_es_field_name\n",
-      "timestamp              timestamp       True     date  strict_date_hour_minute_second  datetime64[ns]           True             True        False                  timestamp\n",
+      "timestamp              timestamp       True     date  strict_date_optional_time  datetime64[ns]           True             True        False                  timestamp\n",
       "OriginAirportID  OriginAirportID       True  keyword                            None          object           True             True        False            OriginAirportID\n",
       "DestAirportID      DestAirportID       True  keyword                            None          object           True             True        False              DestAirportID\n",
       "FlightDelayMin    FlightDelayMin       True  integer                            None           int64           True             True        False             FlightDelayMin\n",
diff --git a/tests/__init__.py b/tests/__init__.py
index a8d1e777..c061d6a2 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -64,7 +64,7 @@
             "OriginRegion": {"type": "keyword"},
             "OriginWeather": {"type": "keyword"},
             "dayOfWeek": {"type": "byte"},
-            "timestamp": {"type": "date", "format": "strict_date_hour_minute_second"},
+            "timestamp": {"type": "date", "format": "strict_date_optional_time"},
         }
     }
 }
diff --git a/tests/field_mappings/test_metric_source_fields_pytest.py b/tests/field_mappings/test_metric_source_fields_pytest.py
index 89510795..ad785f37 100644
--- a/tests/field_mappings/test_metric_source_fields_pytest.py
+++ b/tests/field_mappings/test_metric_source_fields_pytest.py
@@ -70,7 +70,7 @@ def test_flights_all_metric_source_fields_bool_and_timestamp(self):
         assert pd_metric.columns.to_list() == ed_fields
         assert len(es_date_formats) == len(ed_dtypes)
         assert set(es_date_formats) == set(
-            {"strict_date_hour_minute_second", None}
+            {"strict_date_optional_time", None}
         )  # TODO - test position of date_format
 
     def test_ecommerce_selected_non_metric_source_fields(self):