diff --git a/scripts/langindex.json b/scripts/langindex.json
index f4057dcb9..1ef97ed16 100644
--- a/scripts/langindex.json
+++ b/scripts/langindex.json
@@ -1582,6 +1582,8 @@
   "core.course.previousactivity": "local_moodlemobileapp",
   "core.course.previousactivitynotfound": "local_moodlemobileapp",
   "core.course.refreshcourse": "local_moodlemobileapp",
+  "core.course.relativedatessubmissionduedateafter": "course",
+  "core.course.relativedatessubmissionduedatebefore": "course",
   "core.course.section": "moodle",
   "core.course.startdate": "moodle",
   "core.course.thisweek": "format_weeks/currentsection",
diff --git a/src/core/features/course/components/module-info/core-course-module-info.html b/src/core/features/course/components/module-info/core-course-module-info.html
index f01531b83..b338fc7d1 100644
--- a/src/core/features/course/components/module-info/core-course-module-info.html
+++ b/src/core/features/course/components/module-info/core-course-module-info.html
@@ -27,9 +27,8 @@
     <!-- Activity dates. -->
     <div *ngIf="module.dates && module.dates.length" class="core-module-dates core-module-info-box-section">
         <p *ngFor="let date of module.dates">
-            <ion-icon name="fas-calendar" aria-hidden="true"></ion-icon><strong>{{ date.label }}</strong> {{ date.timestamp
-            *
-            1000 | coreFormatDate:'strftimedatetime' }}
+            <ion-icon name="fas-calendar" aria-hidden="true"></ion-icon><strong>{{ date.label }}</strong>
+            {{ date.readableTime }}
         </p>
     </div>
 
diff --git a/src/core/features/course/components/module/core-course-module.html b/src/core/features/course/components/module/core-course-module.html
index 3a6c3e003..8a099383d 100644
--- a/src/core/features/course/components/module/core-course-module.html
+++ b/src/core/features/course/components/module/core-course-module.html
@@ -82,9 +82,8 @@
                     <!-- Activity dates. -->
                     <div *ngIf="showActivityDates && module.dates && module.dates.length" class="core-module-dates">
                         <p *ngFor="let date of module.dates">
-                            <ion-icon name="fas-calendar" aria-hidden="true"></ion-icon><strong>{{ date.label }}</strong> {{ date.timestamp
-                            *
-                            1000 | coreFormatDate:'strftimedatetime' }}
+                            <ion-icon name="fas-calendar" aria-hidden="true"></ion-icon><strong>{{ date.label }}</strong>
+                            {{ date.readableTime }}
                         </p>
                     </div>
 
diff --git a/src/core/features/course/lang.json b/src/core/features/course/lang.json
index 8195622c0..33b03e34d 100644
--- a/src/core/features/course/lang.json
+++ b/src/core/features/course/lang.json
@@ -50,6 +50,8 @@
     "previousactivity": "Previous activity",
     "previousactivitynotfound": "Previous activity not found. It's possible that it has been hidden or deleted.",
     "refreshcourse": "Refresh course",
+    "relativedatessubmissionduedateafter": "{{$a.datediffstr}} after course start",
+    "relativedatessubmissionduedatebefore": "{{$a.datediffstr}} before course start",
     "section": "Section",
     "startdate": "Course start date",
     "thisweek": "This week",
diff --git a/src/core/features/course/services/course-helper.ts b/src/core/features/course/services/course-helper.ts
index e42f3bd71..5529e62db 100644
--- a/src/core/features/course/services/course-helper.ts
+++ b/src/core/features/course/services/course-helper.ts
@@ -27,6 +27,7 @@ import {
     CoreCourseModuleCompletionTracking,
     CoreCourseModuleCompletionStatus,
     CoreCourseGetContentsWSModule,
+    CoreCourseGetContentsWSModuleDate,
 } from './course';
 import { CoreConstants } from '@/core/constants';
 import { CoreLogger } from '@singletons/logger';
@@ -2059,12 +2060,20 @@ export type CoreCourseSectionWithStatus = CoreCourseSection & {
 /**
  * Module with calculated data.
  */
-export type CoreCourseModuleData = Omit<CoreCourseGetContentsWSModule, 'completiondata'> & {
+export type CoreCourseModuleData = Omit<CoreCourseGetContentsWSModule, 'completiondata'|'dates'> & {
     course: number; // The course id.
     isStealth?: boolean;
     handlerData?: CoreCourseModuleHandlerData;
     completiondata?: CoreCourseModuleCompletionData;
     section: number;
+    dates?: CoreCourseModuleDate[];
+};
+
+/**
+ * Module date with calculated data.
+ */
+export type CoreCourseModuleDate = CoreCourseGetContentsWSModuleDate & {
+    readableTime: string;
 };
 
 /**
diff --git a/src/core/features/course/services/course.ts b/src/core/features/course/services/course.ts
index d2d518b94..f5a283831 100644
--- a/src/core/features/course/services/course.ts
+++ b/src/core/features/course/services/course.ts
@@ -38,7 +38,7 @@ import {
 import { CoreDomUtils } from '@services/utils/dom';
 import { CoreWSError } from '@classes/errors/wserror';
 import { CorePushNotifications } from '@features/pushnotifications/services/pushnotifications';
-import { CoreCourseHelper, CoreCourseModuleData, CoreCourseModuleCompletionData } from './course-helper';
+import { CoreCourseHelper, CoreCourseModuleData, CoreCourseModuleCompletionData, CoreCourseModuleDate } from './course-helper';
 import { CoreCourseFormatDelegate } from './format-delegate';
 import { CoreCronDelegate } from '@services/cron';
 import { CoreCourseLogCronHandler } from './handlers/log-cron';
@@ -53,6 +53,7 @@ import { CoreDatabaseTable } from '@classes/database/database-table';
 import { CoreDatabaseCachingStrategy } from '@classes/database/database-table-proxy';
 import { SQLiteDB } from '@classes/sqlitedb';
 import { CorePlatform } from '@services/platform';
+import { CoreTime } from '@singletons/time';
 
 const ROOT_CACHE_KEY = 'mmCourse:';
 
@@ -658,11 +659,39 @@ export class CoreCourseProvider {
             };
         }
 
+        let formattedDates: CoreCourseModuleDate[] | undefined;
+
+        if (module.dates) {
+            formattedDates = module.dates.map(date => {
+                let readableTime = '';
+                if (!date.relativeto) {
+                    readableTime = CoreTimeUtils.userDate(date.timestamp * 1000, 'core.strftimedatetime', true);
+                } else {
+                    readableTime = Translate.instant(
+                        'core.course.relativedatessubmissionduedate' + (date.timestamp > date.relativeto ? 'after' : 'before'),
+                        {
+                            $a: {
+                                datediffstr: date.relativeto === date.timestamp ?
+                                    '0 ' + Translate.instant('core.secs') :
+                                    CoreTime.formatTime(date.relativeto - date.timestamp, 3),
+                            },
+                        },
+                    );
+                }
+
+                return {
+                    ...date,
+                    readableTime,
+                };
+            });
+        }
+
         return  {
             ...module,
             course: courseId,
             section: sectionId,
             completiondata: completionData,
+            dates: formattedDates,
         };
     }
 
@@ -1707,10 +1736,7 @@ export type CoreCourseGetContentsWSModule = {
     completiondata?: CoreCourseModuleWSCompletionData; // Module completion data.
     contents?: CoreCourseModuleContentFile[];
     downloadcontent?: number; // @since 4.0 The download content value.
-    dates?: {
-        label: string;
-        timestamp: number;
-    }[]; // @since 3.11. Activity dates.
+    dates?: CoreCourseGetContentsWSModuleDate[]; // @since 3.11. Activity dates.
     contentsinfo?: { // @since v3.7.6 Contents summary information.
         filescount: number; // Total number of files.
         filessize: number; // Total files size.
@@ -1720,6 +1746,16 @@ export type CoreCourseGetContentsWSModule = {
     };
 };
 
+/**
+ * Activity date.
+ */
+export type CoreCourseGetContentsWSModuleDate = {
+    label: string;
+    timestamp: number;
+    relativeto?: number; // @since 4.1. Relative date timestamp.
+    dataid?: string; // @since 4.1. ID to identify the text.
+};
+
 /**
  * Data returned by core_course_get_contents WS.
  */
diff --git a/src/core/features/course/tests/behat/relative_dates.feature b/src/core/features/course/tests/behat/relative_dates.feature
new file mode 100644
index 000000000..5ed164db7
--- /dev/null
+++ b/src/core/features/course/tests/behat/relative_dates.feature
@@ -0,0 +1,45 @@
+@core @core_course @app @javascript
+Feature: Check relative dates feature.
+
+  Background:
+    Given the following config values are set as admin:
+      | enablecourserelativedates | 1 |
+    Given the following "users" exist:
+      | username | firstname | lastname | email                |
+      | student1 | Student   | 1        | student1@example.com |
+      | teacher1 | Student   | 1        | student1@example.com |
+    And the following "courses" exist:
+      | fullname | shortname | category | startdate            | enddate              | relativedatesmode | showactivitydates |
+      | Course 1 | C1        | 0        | ## 1 January 2022 ## | ## 1 January 2023 ## | 1                 | 1                 |
+    And the following "course enrolments" exist:
+      | user     | course | role           |
+      | student1 | C1     | student        |
+      | teacher1 | C1     | editingteacher |
+    And the following "activities" exist:
+      | activity | course | idnumber | name         | allowsubmissionsfromdate | duedate                        | section |
+      | assign   | C1     | assign1  | Assignment 1 | ## 20 January 2022 ##    | ## 31 July 2022 ##             | 1       |
+      | assign   | C1     | assign2  | Assignment 2 | ## 1 December 2021 ##    | ## 31 January 2023 10:00 AM ## | 2       |
+
+  Scenario: Relative dates (student)
+    Given I entered the course "Course 1" as "student1" in the app
+    When I press "Course index" in the app
+    And I press "Topic 1" in the app
+    Then I should find "20 January 2022, 12:00 AM" near "Opened:" in the app
+    And I should find "31 July 2022, 12:00 AM" near "Due:" in the app
+
+    When I press "Course index" in the app
+    And I press "Topic 2" in the app
+    And I should find "1 December 2021, 12:00 AM" near "Opened:" in the app
+    And I should find "31 January 2023, 10:00 AM" near "Due:" in the app
+
+  Scenario: Relative dates (teacher)
+    Given I entered the course "Course 1" as "teacher1" in the app
+    When I press "Course index" in the app
+    And I press "Topic 1" in the app
+    Then I should find "19 days after course start" near "Opened:" in the app
+    And I should find "211 days after course start" near "Due:" in the app
+
+    When I press "Course index" in the app
+    And I press "Topic 2" in the app
+    And I should find "31 days before course start" near "Opened:" in the app
+    And I should find "1 year 30 days 10 hours after course start" near "Due:" in the app