diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeCustomFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeCustomFormatter.php
index 909f86f..c45c24d 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeCustomFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeCustomFormatter.php
@@ -80,7 +80,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
    */
   protected function formatDate($date) {
     $format = $this->getSetting('date_format');
-    $timezone = $this->getSetting('timezone_override');
+    $timezone = $this->getSetting('timezone_override') ?: $date->getTimezone()->getName();
     return $this->dateFormatter->format($date->getTimestamp(), 'custom', $format, $timezone != '' ? $timezone : NULL);
   }
 
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
index 785fa9a..1469bd4 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
@@ -115,7 +115,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
    */
   protected function formatDate($date) {
     $format_type = $this->getSetting('format_type');
-    $timezone = $this->getSetting('timezone_override');
+    $timezone = $this->getSetting('timezone_override') ?: $date->getTimezone()->getName();
     return $this->dateFormatter->format($date->getTimestamp(), $format_type, '', $timezone != '' ? $timezone : NULL);
   }
 
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeFormatterBase.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeFormatterBase.php
index befe395..f25ecf1 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeFormatterBase.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangeFormatterBase.php
@@ -9,6 +9,7 @@
 use Drupal\Core\Field\FormatterBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\datetime\Plugin\Field\FieldType\DateRangeItem;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\RequestStack;
 
@@ -164,7 +165,14 @@ public function settingsSummary() {
    *   A DrupalDateTime object.
    */
   protected function setTimeZone(DrupalDateTime $date) {
-    $date->setTimeZone(timezone_open(drupal_get_user_timezone()));
+    if ($this->getFieldSetting('datetime_type') === DateRangeItem::DATERANGE_TYPE_DATE) {
+      // A date without time has no timezone conversion.
+      $timezone = DATETIME_STORAGE_TIMEZONE;
+    }
+    else {
+      $timezone = drupal_get_user_timezone();
+    }
+    $date->setTimeZone(timezone_open($timezone));
   }
 
   /**
diff --git a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangePlainFormatter.php b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangePlainFormatter.php
index 7b77a06..a2a1b13 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangePlainFormatter.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldFormatter/DateRangePlainFormatter.php
@@ -69,7 +69,7 @@ public function viewElements(FieldItemListInterface $items, $langcode) {
    */
   protected function formatDate($date) {
     $format = $this->getFieldSetting('daterange_type') == DateRangeItem::DATERANGE_TYPE_DATE ? DATETIME_DATE_STORAGE_FORMAT : DATETIME_DATETIME_STORAGE_FORMAT;
-    $timezone = $this->getSetting('timezone_override');
+    $timezone = $this->getSetting('timezone_override') ?: $date->getTimezone()->getName();
     return $this->dateFormatter->format($date->getTimestamp(), 'custom', $format, $timezone != '' ? $timezone : NULL);
   }
 
diff --git a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateRangeWidgetBase.php b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateRangeWidgetBase.php
index 08d635e..49c5564 100644
--- a/core/modules/datetime/src/Plugin/Field/FieldWidget/DateRangeWidgetBase.php
+++ b/core/modules/datetime/src/Plugin/Field/FieldWidget/DateRangeWidgetBase.php
@@ -45,6 +45,13 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       '#required' => $element['#required'],
     );
 
+    if ($this->getFieldSetting('datetime_type') == DateRangeItem::DATERANGE_TYPE_DATE) {
+      // A date-only field should have no timezone conversion performed, so
+      // use the same timezone as for storage.
+      $element['value']['#date_timezone'] = DATETIME_STORAGE_TIMEZONE;
+      $element['value2']['#date_timezone'] = DATETIME_STORAGE_TIMEZONE;
+    }
+
     if ($items[$delta]->start_date) {
       /** @var \Drupal\Core\Datetime\DrupalDateTime $start_date */
       $start_date = $items[$delta]->start_date;
diff --git a/core/modules/datetime/src/Tests/DateRangeFieldTest.php b/core/modules/datetime/src/Tests/DateRangeFieldTest.php
index 556a6fa..7d1e97b 100644
--- a/core/modules/datetime/src/Tests/DateRangeFieldTest.php
+++ b/core/modules/datetime/src/Tests/DateRangeFieldTest.php
@@ -55,6 +55,28 @@ class DateRangeFieldTest extends WebTestBase {
   protected $field;
 
   /**
+  +   * An array of timezone extremes to test.
+  +   *
+  +   * @var string[]
+  +   */
+  protected static $timezones = [
+  // UTC-12, no DST.
+    'Pacific/Kwajalein',
+    // UTC-11, no DST
+    'Pacific/Midway',
+    // UTC-7, no DST.
+    'America/Phoenix',
+    // UTC.
+    'UTC',
+    // UTC+5:30, no DST.
+    'Asia/Kolkata',
+    // UTC+12, no DST
+    'Pacific/Funafuti',
+    // UTC+13, no DST.
+    'Pacific/Tongatapu',
+  ];
+
+  /**
    * {@inheritdoc}
    */
   protected function setUp() {
@@ -1152,4 +1174,19 @@ protected function renderTestEntity($id, $view_mode = 'full', $reset = TRUE) {
     $this->verbose($output);
   }
 
+  /**
+   * Sets the site timezone to a given timezone.
+   *
+   * @param string $timezone
+   *   The timezone identifier to set.
+   */
+  protected function setSiteTimezone($timezone) {
+    // Set an explicit site timezone, and disallow per-user timezones.
+    $this->config('system.date')
+      ->set('timezone.user.configurable', 0)
+      // A timezone with an offset greater than UTC+12 is used.
+      ->set('timezone.default', $timezone)
+      ->save();
+  }
+
 }