diff --git a/core/themes/seven/style.css b/core/themes/seven/style.css
index 460ef24..f7dd5f4 100644
--- a/core/themes/seven/style.css
+++ b/core/themes/seven/style.css
@@ -1544,3 +1544,8 @@ details.fieldset-no-legend {
   border: none;
   text-decoration: underline;
 }
+
+.field-type-datetime .form-item {
+  border: none;
+}
+