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diff --git a/web/core/modules/datetime_range/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php b/web/core/modules/datetime_range/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
new file mode 100644
index 000000000..f07e83432
--- /dev/null
+++ b/web/core/modules/datetime_range/src/Plugin/Field/FieldFormatter/DateRangeDefaultFormatter.php
@@ -0,0 +1,103 @@
+<?php
+
+namespace Drupal\datetime_range\Plugin\Field\FieldFormatter;
+
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\datetime\Plugin\Field\FieldFormatter\DateTimeDefaultFormatter;
+use Drupal\datetime_range\DateTimeRangeTrait;
+
+/**
+ * Plugin implementation of the 'Default' formatter for 'daterange' fields.
+ *
+ * This formatter renders the data range using <time> elements, with
+ * configurable date formats (from the list of configured formats) and a
+ * separator.
+ *
+ * @FieldFormatter(
+ *   id = "daterange_default",
+ *   label = @Translation("Default"),
+ *   field_types = {
+ *     "daterange"
+ *   }
+ * )
+ */
+class DateRangeDefaultFormatter extends DateTimeDefaultFormatter {
+
+  use DateTimeRangeTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function defaultSettings() {
+    return [
+      'separator' => '-',
+    ] + parent::defaultSettings();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function viewElements(FieldItemListInterface $items, $langcode) {
+    $elements = [];
+    $separator = $this->getSetting('separator');
+
+    foreach ($items as $delta => $item) {
+      if (!empty($item->start_date) && !empty($item->end_date)) {
+        /** @var \Drupal\Core\Datetime\DrupalDateTime $start_date */
+        $start_date = $item->start_date;
+        /** @var \Drupal\Core\Datetime\DrupalDateTime $end_date */
+        $end_date = $item->end_date;
+
+        if ($start_date->getTimestamp() !== $end_date->getTimestamp()) {
+          $elements[$delta] = [
+            'start_date' => $this->buildDateWithIsoAttribute($start_date),
+            'separator' => ['#plain_text' => ' ' . $separator . ' '],
+            'end_date' => $this->buildDateWithIsoAttribute($end_date),
+          ];
+        }
+        else {
+          $elements[$delta] = $this->buildDateWithIsoAttribute($start_date);
+          if (!empty($item->_attributes)) {
+            $elements[$delta]['#attributes'] += $item->_attributes;
+            // Unset field item attributes since they have been included in the
+            // formatter output and should not be rendered in the field template.
+            unset($item->_attributes);
+          }
+        }
+      }
+    }
+
+    return $elements;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsForm(array $form, FormStateInterface $form_state) {
+    $form = parent::settingsForm($form, $form_state);
+
+    $form['separator'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Date separator'),
+      '#description' => $this->t('The string to separate the start and end dates'),
+      '#default_value' => $this->getSetting('separator'),
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsSummary() {
+    $summary = parent::settingsSummary();
+
+    if ($separator = $this->getSetting('separator')) {
+      $summary[] = $this->t('Separator: %separator', ['%separator' => $separator]);
+    }
+
+    return $summary;
+  }
+
+}