diff --git a/mod/quiz/classes/dates.php b/mod/quiz/classes/dates.php
new file mode 100644
index 00000000000..ce0f6058406
--- /dev/null
+++ b/mod/quiz/classes/dates.php
@@ -0,0 +1,68 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Contains the class for fetching the important dates in mod_quiz for a given module instance and a user.
+ *
+ * @package   mod_quiz
+ * @copyright 2021 Shamim Rezaie <shamim@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+declare(strict_types=1);
+
+namespace mod_quiz;
+
+use core\activity_dates;
+
+/**
+ * Class for fetching the important dates in mod_quiz for a given module instance and a user.
+ *
+ * @copyright 2021 Shamim Rezaie <shamim@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class dates extends activity_dates {
+
+    /**
+     * Returns a list of important dates in mod_quiz
+     *
+     * @return array
+     */
+    protected function get_dates(): array {
+        $timeopen = $this->cm->customdata['timeopen'] ?? null;
+        $timeclose = $this->cm->customdata['timeclose'] ?? null;
+        $now = time();
+        $dates = [];
+
+        if ($timeopen) {
+            $openlabelid = $timeopen > $now ? 'activitydate:opens' : 'activitydate:opened';
+            $dates[] = [
+                'label' => get_string($openlabelid, 'core_course'),
+                'timestamp' => (int) $timeopen,
+            ];
+        }
+
+        if ($timeclose) {
+            $closelabelid = $timeclose > $now ? 'activitydate:closes' : 'activitydate:closed';
+            $dates[] = [
+                'label' => get_string($closelabelid, 'core_course'),
+                'timestamp' => (int) $timeclose,
+            ];
+        }
+
+        return $dates;
+    }
+}
diff --git a/mod/quiz/tests/dates_test.php b/mod/quiz/tests/dates_test.php
new file mode 100644
index 00000000000..372ba729d14
--- /dev/null
+++ b/mod/quiz/tests/dates_test.php
@@ -0,0 +1,175 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Contains unit tests for mod_quiz\dates.
+ *
+ * @package   mod_quiz
+ * @category  test
+ * @copyright 2021 Shamim Rezaie <shamim@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+declare(strict_types=1);
+
+namespace mod_quiz;
+
+use advanced_testcase;
+use cm_info;
+use core\activity_dates;
+
+/**
+ * Class for unit testing mod_quiz\dates.
+ *
+ * @copyright 2021 Shamim Rezaie <shamim@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class dates_test extends advanced_testcase {
+
+    /**
+     * Data provider for get_dates_for_module().
+     * @return array[]
+     */
+    public function get_dates_for_module_provider(): array {
+        $now = time();
+        $before = $now - DAYSECS;
+        $earlier = $before - DAYSECS;
+        $after = $now + DAYSECS;
+        $later = $after + DAYSECS;
+
+        return [
+            'without any dates' => [
+                null, null, null, null, null, null, []
+            ],
+            'only with opening time' => [
+                $after, null, null, null, null, null, [
+                    ['label' => get_string('activitydate:opens', 'course'), 'timestamp' => $after],
+                ]
+            ],
+            'only with closing time' => [
+                null, $after, null, null, null, null, [
+                    ['label' => get_string('activitydate:closes', 'course'), 'timestamp' => $after],
+                ]
+            ],
+            'with both times' => [
+                $after, $later, null, null, null, null, [
+                    ['label' => get_string('activitydate:opens', 'course'), 'timestamp' => $after],
+                    ['label' => get_string('activitydate:closes', 'course'), 'timestamp' => $later],
+                ]
+            ],
+            'between the dates' => [
+                $before, $after, null, null, null, null, [
+                    ['label' => get_string('activitydate:opened', 'course'), 'timestamp' => $before],
+                    ['label' => get_string('activitydate:closes', 'course'), 'timestamp' => $after],
+                ]
+            ],
+            'dates are past' => [
+                $earlier, $before, null, null, null, null, [
+                    ['label' => get_string('activitydate:opened', 'course'), 'timestamp' => $earlier],
+                    ['label' => get_string('activitydate:closed', 'course'), 'timestamp' => $before],
+                ]
+            ],
+            'with user override' => [
+                $before, $after, $earlier, $later, null, null, [
+                    ['label' => get_string('activitydate:opened', 'course'), 'timestamp' => $earlier],
+                    ['label' => get_string('activitydate:closes', 'course'), 'timestamp' => $later],
+                ]
+            ],
+            'with group override' => [
+                $before, $after, null, null, $earlier, $later, [
+                    ['label' => get_string('activitydate:opened', 'course'), 'timestamp' => $earlier],
+                    ['label' => get_string('activitydate:closes', 'course'), 'timestamp' => $later],
+                ]
+            ],
+            'with both user and group overrides' => [
+                $before, $after, $earlier, $later, $earlier - DAYSECS, $later + DAYSECS, [
+                    ['label' => get_string('activitydate:opened', 'course'), 'timestamp' => $earlier],
+                    ['label' => get_string('activitydate:closes', 'course'), 'timestamp' => $later],
+                ]
+            ],
+        ];
+    }
+
+    /**
+     * Test for get_dates_for_module().
+     *
+     * @dataProvider get_dates_for_module_provider
+     * @param int|null $timeopen Time of opening the quiz.
+     * @param int|null $timeclose Time of closing the quiz.
+     * @param int|null $usertimeopen The user override for opening the quiz.
+     * @param int|null $usertimeclose The user override for closing the quiz.
+     * @param int|null $grouptimeopen The group override for opening the quiz.
+     * @param int|null $grouptimeclose The group override for closing the quiz.
+     * @param array $expected The expected value of calling get_dates_for_module()
+     */
+    public function test_get_dates_for_module(?int $timeopen, ?int $timeclose,
+            ?int $usertimeopen, ?int $usertimeclose,
+            ?int $grouptimeopen, ?int $grouptimeclose,
+            array $expected) {
+
+        $this->resetAfterTest();
+        $generator = $this->getDataGenerator();
+        /** @var \mod_quiz_generator $quizgenerator */
+        $quizgenerator = $generator->get_plugin_generator('mod_quiz');
+
+        $course = $generator->create_course();
+        $user = $generator->create_user();
+        $generator->enrol_user($user->id, $course->id);
+
+        $data = ['course' => $course->id];
+        if ($timeopen) {
+            $data['timeopen'] = $timeopen;
+        }
+        if ($timeclose) {
+            $data['timeclose'] = $timeclose;
+        }
+        $quiz = $quizgenerator->create_instance($data);
+
+        if ($usertimeopen || $usertimeclose || $grouptimeopen || $grouptimeclose) {
+            $generator->enrol_user($user->id, $course->id);
+            $group = $generator->create_group(['courseid' => $course->id]);
+            $generator->create_group_member(['groupid' => $group->id, 'userid' => $user->id]);
+
+            if ($usertimeopen || $usertimeclose) {
+                $quizgenerator->create_override([
+                    'quiz' => $quiz->id,
+                    'userid' => $user->id,
+                    'timeopen' => $usertimeopen,
+                    'timeclose' => $usertimeclose,
+                ]);
+            }
+
+            if ($grouptimeopen || $grouptimeclose) {
+                $quizgenerator->create_override([
+                    'quiz' => $quiz->id,
+                    'groupid' => $group->id,
+                    'timeopen' => $grouptimeopen,
+                    'timeclose' => $grouptimeclose,
+                ]);
+            }
+        }
+
+        $this->setUser($user);
+
+        $cm = get_coursemodule_from_instance('quiz', $quiz->id);
+        // Make sure we're using a cm_info object.
+        $cm = cm_info::create($cm);
+
+        $dates = activity_dates::get_dates_for_module($cm, (int) $user->id);
+
+        $this->assertEquals($expected, $dates);
+    }
+}