EWPP-1104: Fix date only.

Author: drishu

src/Drupal/Driver/Fields/Drupal8/DatetimeHandler.php

@@ -26,9 +26,16 @@ public function expand($values) {
         // uses UTC for internal storage. If no timezone is specified in a date
         // field value by the step author, assume the default timezone of
         // the Drupal install, and therefore transform it into UTC for storage.
-        $date = new \DateTime($value, $siteTimezone);
-        $date->setTimezone($storageTimezone);
-        $values[$key] = $date->format('Y-m-d\TH:i:s');
+        if ($this->fieldInfo->getSetting('datetime_type') === 'date') {
+          $date = new \DateTime($value);
+          $format = DateTimeItemInterface::DATE_STORAGE_FORMAT;
+        }
+        else {
+          $date = new \DateTime($value, $siteTimezone);
+          $date->setTimezone($storageTimezone);
+          $format = DateTimeItemInterface::DATETIME_STORAGE_FORMAT;
+        }
+        $values[$key] = $date->format($format);
       }
     }
     return $values;