diff --git a/mod/lesson/index.php b/mod/lesson/index.php
index a6b05d172d7..e2c3a639688 100644
--- a/mod/lesson/index.php
+++ b/mod/lesson/index.php
@@ -85,7 +85,8 @@ if ($usesections) {
     $table->head  = array ($strname, $strgrade, $strdeadline);
     $table->align = array ("left", "center", "center");
 }
-
+// Get all deadlines.
+$deadlines = lesson_get_user_deadline($course->id);
 foreach ($lessons as $lesson) {
     if (!$lesson->visible) {
         //Show dimmed if the mod is hidden
@@ -97,12 +98,13 @@ foreach ($lessons as $lesson) {
     $cm = get_coursemodule_from_instance('lesson', $lesson->id);
     $context = context_module::instance($cm->id);
 
-    if ($lesson->deadline == 0) {
+    $deadline = $deadlines[$lesson->id]->userdeadline;
+    if ($deadline == 0) {
         $due = $strnodeadline;
-    } else if ($lesson->deadline > $timenow) {
-        $due = userdate($lesson->deadline);
+    } else if ($deadline > $timenow) {
+        $due = userdate($deadline);
     } else {
-        $due = "<font color=\"red\">".userdate($lesson->deadline)."</font>";
+        $due = "<font color=\"red\">" . userdate($deadline) . "</font>";
     }
 
     if ($usesections) {
diff --git a/mod/lesson/locallib.php b/mod/lesson/locallib.php
index e9780f87f5b..b75a0a0a1d1 100644
--- a/mod/lesson/locallib.php
+++ b/mod/lesson/locallib.php
@@ -1187,6 +1187,44 @@ function lesson_get_user_detailed_report_data(lesson $lesson, $userid, $attempt)
     return array($answerpages, $userstats);
 }
 
+/**
+ * Return user's deadline for all lessons in a course, hereby taking into account group and user overrides.
+ *
+ * @param int $courseid the course id.
+ * @return object An object with of all lessonsids and close unixdates in this course,
+ * taking into account the most lenient overrides, if existing and 0 if no close date is set.
+ */
+function lesson_get_user_deadline($courseid) {
+    global $DB, $USER;
+
+    // For teacher and manager/admins return lesson's deadline.
+    if (has_capability('moodle/course:update', context_course::instance($courseid))) {
+        $sql = "SELECT lesson.id, lesson.deadline AS userdeadline
+                  FROM {lesson} lesson
+                 WHERE lesson.course = :courseid";
+
+        $results = $DB->get_records_sql($sql, array('courseid' => $courseid));
+        return $results;
+    }
+
+    $sql = "SELECT a.id,
+                   COALESCE(v.userclose, v.groupclose, a.deadline, 0) AS userdeadline
+              FROM (
+                      SELECT lesson.id as lessonid,
+                             MAX(leo.deadline) AS userclose, MAX(qgo.deadline) AS groupclose
+                        FROM {lesson} lesson
+                   LEFT JOIN {lesson_overrides} leo on lesson.id = leo.lessonid AND leo.userid = :userid
+                   LEFT JOIN {groups_members} gm ON gm.userid = :useringroupid
+                   LEFT JOIN {lesson_overrides} qgo on lesson.id = qgo.lessonid AND qgo.groupid = gm.groupid
+                       WHERE lesson.course = :courseid
+                    GROUP BY lesson.id
+                   ) v
+              JOIN {lesson} a ON a.id = v.lessonid";
+
+    $results = $DB->get_records_sql($sql, array('userid' => $USER->id, 'useringroupid' => $USER->id, 'courseid' => $courseid));
+    return $results;
+
+}
 
 /**
  * Abstract class that page type's MUST inherit from.
diff --git a/mod/lesson/tests/locallib_test.php b/mod/lesson/tests/locallib_test.php
index dedbb0383d6..e12e6e80e61 100644
--- a/mod/lesson/tests/locallib_test.php
+++ b/mod/lesson/tests/locallib_test.php
@@ -76,4 +76,144 @@ class mod_lesson_locallib_testcase extends advanced_testcase {
             }
         }
     }
+
+    /**
+     * Test test_lesson_get_user_deadline().
+     */
+    public function test_lesson_get_user_deadline() {
+        global $DB;
+
+        $this->resetAfterTest();
+        $this->setAdminUser();
+
+        $basetimestamp = time(); // The timestamp we will base the enddates on.
+
+        // Create generator, course and lessons.
+        $student1 = $this->getDataGenerator()->create_user();
+        $student2 = $this->getDataGenerator()->create_user();
+        $student3 = $this->getDataGenerator()->create_user();
+        $teacher = $this->getDataGenerator()->create_user();
+        $course = $this->getDataGenerator()->create_course();
+        $lessongenerator = $this->getDataGenerator()->get_plugin_generator('mod_lesson');
+
+        // Both lessons close in two hours.
+        $lesson1 = $lessongenerator->create_instance(array('course' => $course->id, 'deadline' => $basetimestamp + 7200));
+        $lesson2 = $lessongenerator->create_instance(array('course' => $course->id, 'deadline' => $basetimestamp + 7200));
+        $group1 = $this->getDataGenerator()->create_group(array('courseid' => $course->id));
+        $group2 = $this->getDataGenerator()->create_group(array('courseid' => $course->id));
+
+        $student1id = $student1->id;
+        $student2id = $student2->id;
+        $student3id = $student3->id;
+        $teacherid = $teacher->id;
+
+        // Users enrolments.
+        $studentrole = $DB->get_record('role', array('shortname' => 'student'));
+        $teacherrole = $DB->get_record('role', array('shortname' => 'editingteacher'));
+        $this->getDataGenerator()->enrol_user($student1id, $course->id, $studentrole->id, 'manual');
+        $this->getDataGenerator()->enrol_user($student2id, $course->id, $studentrole->id, 'manual');
+        $this->getDataGenerator()->enrol_user($student3id, $course->id, $studentrole->id, 'manual');
+        $this->getDataGenerator()->enrol_user($teacherid, $course->id, $teacherrole->id, 'manual');
+
+        // Create groups.
+        $group1 = $this->getDataGenerator()->create_group(array('courseid' => $course->id));
+        $group2 = $this->getDataGenerator()->create_group(array('courseid' => $course->id));
+        $group1id = $group1->id;
+        $group2id = $group2->id;
+        $this->getDataGenerator()->create_group_member(array('userid' => $student1id, 'groupid' => $group1id));
+        $this->getDataGenerator()->create_group_member(array('userid' => $student2id, 'groupid' => $group2id));
+
+        // Group 1 gets an group override for lesson 1 to close in three hours.
+        $record1 = (object) [
+            'lessonid' => $lesson1->id,
+            'groupid' => $group1id,
+            'deadline' => $basetimestamp + 10800 // In three hours.
+        ];
+        $DB->insert_record('lesson_overrides', $record1);
+
+        // Let's test lesson 1 closes in three hours for user student 1 since member of group 1.
+        // lesson 2 closes in two hours.
+        $this->setUser($student1id);
+        $params = new stdClass();
+
+        $comparearray = array();
+        $object = new stdClass();
+        $object->id = $lesson1->id;
+        $object->userdeadline = $basetimestamp + 10800; // The overriden deadline for lesson 1.
+
+        $comparearray[$lesson1->id] = $object;
+
+        $object = new stdClass();
+        $object->id = $lesson2->id;
+        $object->userdeadline = $basetimestamp + 7200; // The unchanged deadline for lesson 2.
+
+        $comparearray[$lesson2->id] = $object;
+
+        $this->assertEquals($comparearray, lesson_get_user_deadline($course->id));
+
+        // Let's test lesson 1 closes in two hours (the original value) for user student 3 since member of no group.
+        $this->setUser($student3id);
+        $params = new stdClass();
+
+        $comparearray = array();
+        $object = new stdClass();
+        $object->id = $lesson1->id;
+        $object->userdeadline = $basetimestamp + 7200; // The original deadline for lesson 1.
+
+        $comparearray[$lesson1->id] = $object;
+
+        $object = new stdClass();
+        $object->id = $lesson2->id;
+        $object->userdeadline = $basetimestamp + 7200; // The original deadline for lesson 2.
+
+        $comparearray[$lesson2->id] = $object;
+
+        $this->assertEquals($comparearray, lesson_get_user_deadline($course->id));
+
+        // User 2 gets an user override for lesson 1 to close in four hours.
+        $record2 = (object) [
+            'lessonid' => $lesson1->id,
+            'userid' => $student2id,
+            'deadline' => $basetimestamp + 14400 // In four hours.
+        ];
+        $DB->insert_record('lesson_overrides', $record2);
+
+        // Let's test lesson 1 closes in four hours for user student 2 since personally overriden.
+        // lesson 2 closes in two hours.
+        $this->setUser($student2id);
+
+        $comparearray = array();
+        $object = new stdClass();
+        $object->id = $lesson1->id;
+        $object->userdeadline = $basetimestamp + 14400; // The overriden deadline for lesson 1.
+
+        $comparearray[$lesson1->id] = $object;
+
+        $object = new stdClass();
+        $object->id = $lesson2->id;
+        $object->userdeadline = $basetimestamp + 7200; // The unchanged deadline for lesson 2.
+
+        $comparearray[$lesson2->id] = $object;
+
+        $this->assertEquals($comparearray, lesson_get_user_deadline($course->id));
+
+        // Let's test a teacher sees the original times.
+        // lesson 1 and lesson 2 close in two hours.
+        $this->setUser($teacherid);
+
+        $comparearray = array();
+        $object = new stdClass();
+        $object->id = $lesson1->id;
+        $object->userdeadline = $basetimestamp + 7200; // The unchanged deadline for lesson 1.
+
+        $comparearray[$lesson1->id] = $object;
+
+        $object = new stdClass();
+        $object->id = $lesson2->id;
+        $object->userdeadline = $basetimestamp + 7200; // The unchanged deadline for lesson 2.
+
+        $comparearray[$lesson2->id] = $object;
+
+        $this->assertEquals($comparearray, lesson_get_user_deadline($course->id));
+    }
 }