diff --git a/singer_sdk/helpers/_typing.py b/singer_sdk/helpers/_typing.py
index 2ccb9c471..1e7370fd9 100644
--- a/singer_sdk/helpers/_typing.py
+++ b/singer_sdk/helpers/_typing.py
@@ -511,7 +511,7 @@ def _conform_primitive_property(  # noqa: PLR0911
     if isinstance(elem, (datetime.datetime,)):
         return to_json_compatible(elem)
     if isinstance(elem, datetime.date):
-        return f"{elem.isoformat()}T00:00:00+00:00"
+        return elem.isoformat()
     if isinstance(elem, datetime.timedelta):
         epoch = datetime.datetime.fromtimestamp(0, UTC)
         timedelta_from_epoch = epoch + elem
diff --git a/tests/core/test_typing.py b/tests/core/test_typing.py
index 66182c52d..5043c75e1 100644
--- a/tests/core/test_typing.py
+++ b/tests/core/test_typing.py
@@ -294,7 +294,7 @@ def test_conform_primitives():
     )
     assert (
         _conform_primitive_property(datetime.date(2020, 5, 17), {"type": "string"})
-        == "2020-05-17T00:00:00+00:00"
+        == "2020-05-17"
     )
     assert (
         _conform_primitive_property(datetime.timedelta(365), {"type": "string"})