diff --git a/mod/quiz/accessrule/openclosedate/lang/en/deprecated.txt b/mod/quiz/accessrule/openclosedate/lang/en/deprecated.txt
new file mode 100644
index 00000000000..03fecc7b713
--- /dev/null
+++ b/mod/quiz/accessrule/openclosedate/lang/en/deprecated.txt
@@ -0,0 +1 @@
+quiznotavailable,quizaccess_openclosedate
diff --git a/mod/quiz/accessrule/openclosedate/lang/en/quizaccess_openclosedate.php b/mod/quiz/accessrule/openclosedate/lang/en/quizaccess_openclosedate.php
index 8e5191d3591..30dbc8ae1a0 100644
--- a/mod/quiz/accessrule/openclosedate/lang/en/quizaccess_openclosedate.php
+++ b/mod/quiz/accessrule/openclosedate/lang/en/quizaccess_openclosedate.php
@@ -30,4 +30,7 @@ defined('MOODLE_INTERNAL') || die();
 $string['notavailable'] = 'This quiz is not currently available';
 $string['pluginname'] = 'Open and close date access rule';
 $string['privacy:metadata'] = 'The Open and close date quiz access rule plugin does not store any personal data.';
+
+// Deprecated since Moodle 3.11.
 $string['quiznotavailable'] = 'The quiz will not be available until {$a}';
+
diff --git a/mod/quiz/accessrule/openclosedate/rule.php b/mod/quiz/accessrule/openclosedate/rule.php
index 98d6da5a90d..2bb70dac93a 100644
--- a/mod/quiz/accessrule/openclosedate/rule.php
+++ b/mod/quiz/accessrule/openclosedate/rule.php
@@ -42,30 +42,6 @@ class quizaccess_openclosedate extends quiz_access_rule_base {
         return new self($quizobj, $timenow);
     }
 
-    public function description() {
-        $result = array();
-        if ($this->timenow < $this->quiz->timeopen) {
-            $result[] = get_string('quiznotavailable', 'quizaccess_openclosedate',
-                    userdate($this->quiz->timeopen));
-            if ($this->quiz->timeclose) {
-                $result[] = get_string('quizcloseson', 'quiz', userdate($this->quiz->timeclose));
-            }
-
-        } else if ($this->quiz->timeclose && $this->timenow > $this->quiz->timeclose) {
-            $result[] = get_string('quizclosed', 'quiz', userdate($this->quiz->timeclose));
-
-        } else {
-            if ($this->quiz->timeopen) {
-                $result[] = get_string('quizopenedon', 'quiz', userdate($this->quiz->timeopen));
-            }
-            if ($this->quiz->timeclose) {
-                $result[] = get_string('quizcloseson', 'quiz', userdate($this->quiz->timeclose));
-            }
-        }
-
-        return $result;
-    }
-
     public function prevent_access() {
         $message = get_string('notavailable', 'quizaccess_openclosedate');
 
diff --git a/mod/quiz/accessrule/openclosedate/tests/rule_test.php b/mod/quiz/accessrule/openclosedate/tests/rule_test.php
index 08beabe9c92..2da8fad436e 100644
--- a/mod/quiz/accessrule/openclosedate/tests/rule_test.php
+++ b/mod/quiz/accessrule/openclosedate/tests/rule_test.php
@@ -50,7 +50,6 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $attempt->preview = 0;
 
         $rule = new quizaccess_openclosedate($quizobj, 10000);
-        $this->assertEmpty($rule->description());
         $this->assertFalse($rule->prevent_access());
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
@@ -59,7 +58,6 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $this->assertFalse($rule->time_left_display($attempt, 0));
 
         $rule = new quizaccess_openclosedate($quizobj, 0);
-        $this->assertEmpty($rule->description());
         $this->assertFalse($rule->prevent_access());
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
@@ -79,8 +77,6 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $attempt->preview = 0;
 
         $rule = new quizaccess_openclosedate($quizobj, 9999);
-        $this->assertEquals($rule->description(),
-            array(get_string('quiznotavailable', 'quizaccess_openclosedate', userdate(10000))));
         $this->assertEquals($rule->prevent_access(),
             get_string('notavailable', 'quizaccess_openclosedate'));
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
@@ -89,8 +85,6 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $this->assertFalse($rule->time_left_display($attempt, 0));
 
         $rule = new quizaccess_openclosedate($quizobj, 10000);
-        $this->assertEquals($rule->description(),
-            array(get_string('quizopenedon', 'quiz', userdate(10000))));
         $this->assertFalse($rule->prevent_access());
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
@@ -110,8 +104,6 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $attempt->preview = 0;
 
         $rule = new quizaccess_openclosedate($quizobj, 20000);
-        $this->assertEquals($rule->description(),
-            array(get_string('quizcloseson', 'quiz', userdate(20000))));
         $this->assertFalse($rule->prevent_access());
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
@@ -123,8 +115,6 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $this->assertEquals($rule->time_left_display($attempt, 20100), -100);
 
         $rule = new quizaccess_openclosedate($quizobj, 20001);
-        $this->assertEquals($rule->description(),
-            array(get_string('quizclosed', 'quiz', userdate(20000))));
         $this->assertEquals($rule->prevent_access(),
             get_string('notavailable', 'quizaccess_openclosedate'));
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
@@ -148,33 +138,22 @@ class quizaccess_openclosedate_testcase extends basic_testcase {
         $attempt->preview = 0;
 
         $rule = new quizaccess_openclosedate($quizobj, 9999);
-        $this->assertEquals($rule->description(),
-            array(get_string('quiznotavailable', 'quizaccess_openclosedate', userdate(10000)),
-                    get_string('quizcloseson', 'quiz', userdate(20000))));
         $this->assertEquals($rule->prevent_access(),
             get_string('notavailable', 'quizaccess_openclosedate'));
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
 
         $rule = new quizaccess_openclosedate($quizobj, 10000);
-        $this->assertEquals($rule->description(),
-            array(get_string('quizopenedon', 'quiz', userdate(10000)),
-                get_string('quizcloseson', 'quiz', userdate(20000))));
         $this->assertFalse($rule->prevent_access());
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
 
         $rule = new quizaccess_openclosedate($quizobj, 20000);
-        $this->assertEquals($rule->description(),
-            array(get_string('quizopenedon', 'quiz', userdate(10000)),
-                get_string('quizcloseson', 'quiz', userdate(20000))));
         $this->assertFalse($rule->prevent_access());
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
         $this->assertFalse($rule->is_finished(0, $attempt));
 
         $rule = new quizaccess_openclosedate($quizobj, 20001);
-        $this->assertEquals($rule->description(),
-            array(get_string('quizclosed', 'quiz', userdate(20000))));
         $this->assertEquals($rule->prevent_access(),
             get_string('notavailable', 'quizaccess_openclosedate'));
         $this->assertFalse($rule->prevent_new_attempt(0, $attempt));
diff --git a/mod/quiz/tests/external_test.php b/mod/quiz/tests/external_test.php
index 9d97fce8c15..8e7a93dcf82 100644
--- a/mod/quiz/tests/external_test.php
+++ b/mod/quiz/tests/external_test.php
@@ -1670,8 +1670,8 @@ class mod_quiz_external_testcase extends externallib_advanced_testcase {
         $result = mod_quiz_external::get_quiz_access_information($quiz->id);
         $result = external_api::clean_returnvalue(mod_quiz_external::get_quiz_access_information_returns(), $result);
 
-        // Access limited by time and password.
-        $this->assertCount(3, $result['accessrules']);
+        // Access is limited by time and password, but only the password limit has a description.
+        $this->assertCount(1, $result['accessrules']);
         // Two rule names, password and open/close date.
         $this->assertCount(2, $result['activerulenames']);
         $this->assertCount(1, $result['preventaccessreasons']);