Srishti Bankar
--- a/core/modules/datetime_range/datetime_range.post_update.php
+++ b/core/modules/datetime_range/datetime_range.post_update.php
    'datetime_range_post_update_views_string_plugin_id' => '9.0.0',
  ];
 }
+
+/**
+ * Updates date range field formatter configuration by adding a "from_to" setting to flagged entity view displays.
+ *
+ * @see \datetime_range_entity_view_display_presave
+ */
+function datetime_range_post_update_from_to_configuration(array &$sandbox = NULL): void {
+  $config_entity_updater = \Drupal::classResolver(ConfigEntityUpdater::class);
+
+  $callback = function (EntityViewDisplayInterface $entity_view_display) {
+    return $entity_view_display->get('datetime_range_updated') === TRUE;
--- a/core/modules/datetime_range/src/DateTimeRangeTrait.php
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php
+      '#description' => $this->t('The string to separate the start and end dates'),
+      '#default_value' => $this->getSetting('separator'),
+      '#states' => [
+        'visible' => [
+          'select[name="fields[' . $field_name . '][settings_edit_form][settings][from_to]"]' => ['value' => DateTimeRangeConstants::BOTH],
+        ],
+      ],
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function dateTimeRangeSettingsSummary() {
--- a/core/modules/datetime_range/src/DateTimeRangeTrait.php
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php
+   */
+  protected function getFromToOptions() {
+    return [
+      DateTimeRangeConstants::BOTH => $this->t('Display both start and end dates'),
+      DateTimeRangeConstants::START_DATE => $this->t('Display start date only'),
+      DateTimeRangeConstants::END_DATE => $this->t('Display end date only'),
+    ];
+  }
+
+  /**
+   * Returns whether or not the start date should be displayed.
+   *
+   * @return bool
+   *   True if the start date should be displayed. False otherwise.
+   */
+  public function startDateIsDisplayed() {
--- a/core/modules/datetime_range/src/DateTimeRangeTrait.php
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php
+    switch ($this->getSetting('from_to')) {
+      case DateTimeRangeConstants::BOTH:
+      case DateTimeRangeConstants::START_DATE:
+        return TRUE;
+    }
+
+    return FALSE;
+  }
+
+  /**
+   * Returns whether or not the end date should be displayed.
+   *
+   * @return bool
+   *   True if the end date should be displayed. False otherwise.
+   */
+  public function endDateIsDisplayed() {
--- a/core/modules/datetime_range/src/DateTimeRangeTrait.php
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php

 namespace Drupal\datetime_range;

+use Drupal\Core\Datetime\DrupalDateTime;
 use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Form\FormStateInterface;

 /**
 * Provides friendly methods for datetime range.
 */
 trait DateTimeRangeTrait {

+  /**
+   * {@inheritdoc}
+   */
+  public static function dateTimeRangeDefaultSettings() {
--- a/core/modules/datetime_range/datetime_range.module
+++ b/core/modules/datetime_range/datetime_range.module
+    ];
+
+    if (!in_array($plugin_definition['class'], $daterange_formatter_classes, FALSE)) {
+      continue;
+    }
+
+    if (!isset($component['settings']['from_to'])) {
+      // Existing daterange formatters don't have 'from_to'.
+      $component['settings']['from_to'] = DateTimeRangeConstants::BOTH;
+      $entity_view_display->setComponent($name, $component);
+      $update = TRUE;
+    }
+  }
+
+  if ($update) {
+    $entity_view_display->set('datetime_range_updated', TRUE);
--- a/core/modules/datetime_range/src/DateTimeRangeConstants.php 0 → 100644
+++ b/core/modules/datetime_range/src/DateTimeRangeConstants.php 0 → 100644
+<?php
+
+namespace Drupal\datetime_range;
+
+/**
+ * Declares constants used in the datetime range module.
+ */
+class DateTimeRangeConstants {
--- a/core/modules/datetime_range/src/DateTimeRangeTrait.php
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php
+  /**
+   * Returns a list of possible values for the 'from_to' setting.
+   *
+   * @return array
+   *   A list of 'from_to' options.
+   */
+  protected function getFromToOptions() {
+    return [
+      DateTimeRangeConstants::BOTH => $this->t('Display both start and end dates'),
+      DateTimeRangeConstants::START_DATE => $this->t('Display start date only'),
+      DateTimeRangeConstants::END_DATE => $this->t('Display end date only'),
+    ];
+  }
+
+  /**
+   * Returns whether or not the start date should be displayed.
-   * Returns whether or not the start date should be displayed.
+   * Returns whether the start date should be displayed.
--- a/core/modules/datetime_range/src/DateTimeRangeConstants.php 0 → 100644
+++ b/core/modules/datetime_range/src/DateTimeRangeConstants.php 0 → 100644
+<?php
+
+namespace Drupal\datetime_range;
+
+/**
+ * Declares constants used in the datetime range module.
+ */
+enum DateTimeRangeConstants: string {
--- a/core/modules/datetime_range/datetime_range.module
+++ b/core/modules/datetime_range/datetime_range.module
      return $output;
  }
 }
+
+/**
+ * Implements hook_ENTITY_TYPE_presave() for entity_view_display entities.
+ */
+function datetime_range_entity_view_display_presave(EntityViewDisplayInterface $entity_view_display): void {