diff --git a/django/contrib/admin/static/admin/css/base.css b/django/contrib/admin/static/admin/css/base.css
index 4f4773284e..bdeefbc6e9 100644
--- a/django/contrib/admin/static/admin/css/base.css
+++ b/django/contrib/admin/static/admin/css/base.css
@@ -118,6 +118,15 @@ a:focus {
     text-decoration: underline;
 }
 
+a:not(
+    [role="button"],
+    #header a,
+    #nav-sidebar a,
+    #content-main.app-list a
+) {
+    text-decoration: underline;
+}
+
 a img {
     border: none;
 }
diff --git a/django/contrib/admin/static/admin/js/admin/DateTimeShortcuts.js b/django/contrib/admin/static/admin/js/admin/DateTimeShortcuts.js
index aa1cae9eeb..8168172a97 100644
--- a/django/contrib/admin/static/admin/js/admin/DateTimeShortcuts.js
+++ b/django/contrib/admin/static/admin/js/admin/DateTimeShortcuts.js
@@ -108,6 +108,7 @@
             const now_link = document.createElement('a');
             now_link.href = "#";
             now_link.textContent = gettext('Now');
+            now_link.role = 'button';
             now_link.addEventListener('click', function(e) {
                 e.preventDefault();
                 DateTimeShortcuts.handleClockQuicklink(num, -1);
@@ -163,7 +164,7 @@
             // where name is the name attribute of the <input>.
             const name = typeof DateTimeShortcuts.clockHours[inp.name] === 'undefined' ? 'default_' : inp.name;
             DateTimeShortcuts.clockHours[name].forEach(function(element) {
-                const time_link = quickElement('a', quickElement('li', time_list), gettext(element[0]), 'href', '#');
+                const time_link = quickElement('a', quickElement('li', time_list), gettext(element[0]), 'role', 'button', 'href', '#');
                 time_link.addEventListener('click', function(e) {
                     e.preventDefault();
                     DateTimeShortcuts.handleClockQuicklink(num, element[1]);
@@ -172,7 +173,7 @@
 
             const cancel_p = quickElement('p', clock_box);
             cancel_p.className = 'calendar-cancel';
-            const cancel_link = quickElement('a', cancel_p, gettext('Cancel'), 'href', '#');
+            const cancel_link = quickElement('a', cancel_p, gettext('Cancel'), 'role', 'button', 'href', '#');
             cancel_link.addEventListener('click', function(e) {
                 e.preventDefault();
                 DateTimeShortcuts.dismissClock(num);
@@ -235,6 +236,7 @@
             inp.parentNode.insertBefore(shortcuts_span, inp.nextSibling);
             const today_link = document.createElement('a');
             today_link.href = '#';
+            today_link.role = 'button';
             today_link.appendChild(document.createTextNode(gettext('Today')));
             today_link.addEventListener('click', function(e) {
                 e.preventDefault();
@@ -309,19 +311,19 @@
             // calendar shortcuts
             const shortcuts = quickElement('div', cal_box);
             shortcuts.className = 'calendar-shortcuts';
-            let day_link = quickElement('a', shortcuts, gettext('Yesterday'), 'href', '#');
+            let day_link = quickElement('a', shortcuts, gettext('Yesterday'), 'role', 'button', 'href', '#');
             day_link.addEventListener('click', function(e) {
                 e.preventDefault();
                 DateTimeShortcuts.handleCalendarQuickLink(num, -1);
             });
             shortcuts.appendChild(document.createTextNode('\u00A0|\u00A0'));
-            day_link = quickElement('a', shortcuts, gettext('Today'), 'href', '#');
+            day_link = quickElement('a', shortcuts, gettext('Today'), 'role', 'button', 'href', '#');
             day_link.addEventListener('click', function(e) {
                 e.preventDefault();
                 DateTimeShortcuts.handleCalendarQuickLink(num, 0);
             });
             shortcuts.appendChild(document.createTextNode('\u00A0|\u00A0'));
-            day_link = quickElement('a', shortcuts, gettext('Tomorrow'), 'href', '#');
+            day_link = quickElement('a', shortcuts, gettext('Tomorrow'), 'role', 'button', 'href', '#');
             day_link.addEventListener('click', function(e) {
                 e.preventDefault();
                 DateTimeShortcuts.handleCalendarQuickLink(num, +1);
@@ -330,7 +332,7 @@
             // cancel bar
             const cancel_p = quickElement('p', cal_box);
             cancel_p.className = 'calendar-cancel';
-            const cancel_link = quickElement('a', cancel_p, gettext('Cancel'), 'href', '#');
+            const cancel_link = quickElement('a', cancel_p, gettext('Cancel'), 'role', 'button', 'href', '#');
             cancel_link.addEventListener('click', function(e) {
                 e.preventDefault();
                 DateTimeShortcuts.dismissCalendar(num);
diff --git a/django/contrib/admin/static/admin/js/calendar.js b/django/contrib/admin/static/admin/js/calendar.js
index 776310f75b..b13242078a 100644
--- a/django/contrib/admin/static/admin/js/calendar.js
+++ b/django/contrib/admin/static/admin/js/calendar.js
@@ -160,7 +160,7 @@ depends on core.js for utility functions like removeChildren or quickElement
                 }
 
                 const cell = quickElement('td', tableRow, '', 'class', todayClass);
-                const link = quickElement('a', cell, currentDay, 'href', '#');
+                const link = quickElement('a', cell, currentDay, 'role', 'button', 'href', '#');
                 link.addEventListener('click', calendarMonth(year, month));
                 currentDay++;
             }
diff --git a/django/contrib/admin/templates/admin/change_form_object_tools.html b/django/contrib/admin/templates/admin/change_form_object_tools.html
index 067ae83761..2ab2b541e7 100644
--- a/django/contrib/admin/templates/admin/change_form_object_tools.html
+++ b/django/contrib/admin/templates/admin/change_form_object_tools.html
@@ -2,7 +2,7 @@
 {% block object-tools-items %}
 <li>
     {% url opts|admin_urlname:'history' original.pk|admin_urlquote as history_url %}
-    <a href="{% add_preserved_filters history_url %}" class="historylink">{% translate "History" %}</a>
+    <a role="button" href="{% add_preserved_filters history_url %}" class="historylink">{% translate "History" %}</a>
 </li>
 {% if has_absolute_url %}<li><a href="{{ absolute_url }}" class="viewsitelink">{% translate "View on site" %}</a></li>{% endif %}
 {% endblock %}
diff --git a/django/contrib/admin/templates/admin/change_list_object_tools.html b/django/contrib/admin/templates/admin/change_list_object_tools.html
index 11cc6fa4ba..35bff31fb7 100644
--- a/django/contrib/admin/templates/admin/change_list_object_tools.html
+++ b/django/contrib/admin/templates/admin/change_list_object_tools.html
@@ -4,7 +4,7 @@
   {% if has_add_permission %}
   <li>
     {% url cl.opts|admin_urlname:'add' as add_url %}
-    <a href="{% add_preserved_filters add_url is_popup to_field %}" class="addlink">
+    <a role="button" href="{% add_preserved_filters add_url is_popup to_field %}" class="addlink">
       {% blocktranslate with cl.opts.verbose_name as name %}Add {{ name }}{% endblocktranslate %}
     </a>
   </li>
diff --git a/django/contrib/admin/templates/admin/change_list_results.html b/django/contrib/admin/templates/admin/change_list_results.html
index d2a9feed20..bea4a5b859 100644
--- a/django/contrib/admin/templates/admin/change_list_results.html
+++ b/django/contrib/admin/templates/admin/change_list_results.html
@@ -18,7 +18,7 @@
          <a href="{{ header.url_toggle }}" class="toggle {{ header.ascending|yesno:'ascending,descending' }}" title="{% translate "Toggle sorting" %}"></a>
        </div>
    {% endif %}
-   <div class="text">{% if header.sortable %}<a href="{{ header.url_primary }}">{{ header.text|capfirst }}</a>{% else %}<span>{{ header.text|capfirst }}</span>{% endif %}</div>
+   <div class="text">{% if header.sortable %}<a role="button" href="{{ header.url_primary }}">{{ header.text|capfirst }}</a>{% else %}<span>{{ header.text|capfirst }}</span>{% endif %}</div>
    <div class="clear"></div>
 </th>{% endfor %}
 </tr>
diff --git a/django/contrib/admin/templates/admin/delete_confirmation.html b/django/contrib/admin/templates/admin/delete_confirmation.html
index e3f08ee651..2ccf719e05 100644
--- a/django/contrib/admin/templates/admin/delete_confirmation.html
+++ b/django/contrib/admin/templates/admin/delete_confirmation.html
@@ -42,7 +42,7 @@
     {% if is_popup %}<input type="hidden" name="{{ is_popup_var }}" value="1">{% endif %}
     {% if to_field %}<input type="hidden" name="{{ to_field_var }}" value="{{ to_field }}">{% endif %}
     <input type="submit" value="{% translate 'Yes, I’m sure' %}">
-    <a href="#" class="button cancel-link">{% translate "No, take me back" %}</a>
+    <a role="button" href="#" class="button cancel-link">{% translate "No, take me back" %}</a>
     </div>
     </form>
   {% endblock %}
diff --git a/django/contrib/admin/templates/admin/delete_selected_confirmation.html b/django/contrib/admin/templates/admin/delete_selected_confirmation.html
index 51b93a5f49..2414e79095 100644
--- a/django/contrib/admin/templates/admin/delete_selected_confirmation.html
+++ b/django/contrib/admin/templates/admin/delete_selected_confirmation.html
@@ -40,7 +40,7 @@
     <input type="hidden" name="action" value="delete_selected">
     <input type="hidden" name="post" value="yes">
     <input type="submit" value="{% translate 'Yes, I’m sure' %}">
-    <a href="#" class="button cancel-link">{% translate "No, take me back" %}</a>
+    <a role="button" href="#" class="button cancel-link">{% translate "No, take me back" %}</a>
     </div>
     </form>
 {% endif %}
diff --git a/django/contrib/admin/templates/admin/index.html b/django/contrib/admin/templates/admin/index.html
index 899727a4ba..502515a8f5 100644
--- a/django/contrib/admin/templates/admin/index.html
+++ b/django/contrib/admin/templates/admin/index.html
@@ -12,7 +12,7 @@
 {% block nav-sidebar %}{% endblock %}
 
 {% block content %}
-<div id="content-main">
+<div id="content-main" class="app-list">
   {% include "admin/app_list.html" with app_list=app_list show_changelinks=True %}
 </div>
 {% endblock %}
diff --git a/django/contrib/admin/templates/admin/object_history.html b/django/contrib/admin/templates/admin/object_history.html
index f83984c300..2b3b06caa0 100644
--- a/django/contrib/admin/templates/admin/object_history.html
+++ b/django/contrib/admin/templates/admin/object_history.html
@@ -42,7 +42,7 @@
           {% elif i == action_list.number %}
             <span class="this-page">{{ i }}</span>
           {% else %}
-            <a href="?{{ page_var }}={{ i }}" {% if i == action_list.paginator.num_pages %} class="end" {% endif %}>{{ i }}</a>
+            <a role="button" href="?{{ page_var }}={{ i }}" {% if i == action_list.paginator.num_pages %} class="end" {% endif %}>{{ i }}</a>
           {% endif %}
         {% endfor %}
       {% endif %}
diff --git a/django/contrib/admin/templates/admin/submit_line.html b/django/contrib/admin/templates/admin/submit_line.html
index b2b2054966..5390dd36c1 100644
--- a/django/contrib/admin/templates/admin/submit_line.html
+++ b/django/contrib/admin/templates/admin/submit_line.html
@@ -7,11 +7,11 @@
 {% if show_save_and_continue %}<input type="submit" value="{% if can_change %}{% translate 'Save and continue editing' %}{% else %}{% translate 'Save and view' %}{% endif %}" name="_continue">{% endif %}
 {% if show_close %}
     {% url opts|admin_urlname:'changelist' as changelist_url %}
-    <a href="{% add_preserved_filters changelist_url %}" class="closelink">{% translate 'Close' %}</a>
+    <a role="button" href="{% add_preserved_filters changelist_url %}" class="closelink">{% translate 'Close' %}</a>
 {% endif %}
 {% if show_delete_link and original %}
     {% url opts|admin_urlname:'delete' original.pk|admin_urlquote as delete_url %}
-    <a href="{% add_preserved_filters delete_url %}" class="deletelink">{% translate "Delete" %}</a>
+    <a role="button" href="{% add_preserved_filters delete_url %}" class="deletelink">{% translate "Delete" %}</a>
 {% endif %}
 {% endblock %}
 </div>
diff --git a/django/contrib/admin/templatetags/admin_list.py b/django/contrib/admin/templatetags/admin_list.py
index 6615e98bbf..e7cb244af1 100644
--- a/django/contrib/admin/templatetags/admin_list.py
+++ b/django/contrib/admin/templatetags/admin_list.py
@@ -45,7 +45,7 @@ def paginator_number(cl, i):
         return format_html('<span class="this-page">{}</span> ', i)
     else:
         return format_html(
-            '<a href="{}"{}>{}</a> ',
+            '<a role="button" href="{}"{}>{}</a> ',
             cl.get_query_string({PAGE_VAR: i}),
             mark_safe(' class="end"' if i == cl.paginator.num_pages else ""),
             i,
diff --git a/django/contrib/auth/templates/auth/widgets/read_only_password_hash.html b/django/contrib/auth/templates/auth/widgets/read_only_password_hash.html
index e95fa3e9da..b48204b7eb 100644
--- a/django/contrib/auth/templates/auth/widgets/read_only_password_hash.html
+++ b/django/contrib/auth/templates/auth/widgets/read_only_password_hash.html
@@ -4,5 +4,5 @@
     <strong>{{ entry.label }}</strong>{% if entry.value %}: <bdi>{{ entry.value }}</bdi>{% endif %}
     {% endfor %}
   </p>
-  <p><a class="button" href="{{ password_url|default:"../password/" }}">{{ button_label }}</a></p>
+  <p><a role="button" class="button" href="{{ password_url|default:"../password/" }}">{{ button_label }}</a></p>
 </div>
diff --git a/docs/intro/_images/admin04t.png b/docs/intro/_images/admin04t.png
index 517b2296b3..2890ebf517 100644
Binary files a/docs/intro/_images/admin04t.png and b/docs/intro/_images/admin04t.png differ
diff --git a/docs/intro/_images/admin12t.png b/docs/intro/_images/admin12t.png
index 6b43c7ae6d..7dafa6614f 100644
Binary files a/docs/intro/_images/admin12t.png and b/docs/intro/_images/admin12t.png differ
diff --git a/docs/intro/_images/admin13t.png b/docs/intro/_images/admin13t.png
index 0d79edefd4..6ccba2636f 100644
Binary files a/docs/intro/_images/admin13t.png and b/docs/intro/_images/admin13t.png differ
diff --git a/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png b/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png
index 6ae454e0de..a0939a28a2 100644
Binary files a/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png and b/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png differ
diff --git a/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png b/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png
index 9510706dad..84889f9e26 100644
Binary files a/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png and b/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png differ
diff --git a/docs/ref/contrib/admin/_images/admin-actions.png b/docs/ref/contrib/admin/_images/admin-actions.png
index 7c3a6ccc2e..3750bb68dd 100644
Binary files a/docs/ref/contrib/admin/_images/admin-actions.png and b/docs/ref/contrib/admin/_images/admin-actions.png differ
diff --git a/docs/ref/contrib/admin/_images/list_filter.png b/docs/ref/contrib/admin/_images/list_filter.png
index 02c4879d18..cb433d4ef3 100644
Binary files a/docs/ref/contrib/admin/_images/list_filter.png and b/docs/ref/contrib/admin/_images/list_filter.png differ
diff --git a/tests/admin_inlines/tests.py b/tests/admin_inlines/tests.py
index 89f43300d7..63e7393853 100644
--- a/tests/admin_inlines/tests.py
+++ b/tests/admin_inlines/tests.py
@@ -1454,12 +1454,13 @@ class TestReadOnlyChangeViewInlinePermissions(TestCase):
         response = self.client.get(self.change_url)
         self.assertContains(
             response,
-            '<a href="/admin/admin_inlines/poll/" class="closelink">Close</a>',
+            '<a role="button" href="/admin/admin_inlines/poll/" class="closelink">'
+            "Close</a>",
             html=True,
         )
         delete_link = (
-            '<a href="/admin/admin_inlines/poll/%s/delete/" class="deletelink">Delete'
-            "</a>"
+            '<a role="button" href="/admin/admin_inlines/poll/%s/delete/" '
+            'class="deletelink">Delete</a>'
         )
         self.assertNotContains(response, delete_link % self.poll.id, html=True)
         self.assertNotContains(
diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index feafde47fd..b79b4a94a4 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -2683,8 +2683,8 @@ class AdminViewPermissionsTest(TestCase):
         self.assertContains(response, "<label>Extra form field:</label>")
         self.assertContains(
             response,
-            '<a href="/test_admin/admin/admin_views/article/" class="closelink">Close'
-            "</a>",
+            '<a role="button" href="/test_admin/admin/admin_views/article/" '
+            'class="closelink">Close</a>',
         )
         self.assertEqual(response.context["title"], "View article")
         post = self.client.post(article_change_url, change_dict)
@@ -2835,8 +2835,8 @@ class AdminViewPermissionsTest(TestCase):
         self.assertContains(response, "<h1>View article</h1>")
         self.assertContains(
             response,
-            '<a href="/test_admin/admin9/admin_views/article/" class="closelink">Close'
-            "</a>",
+            '<a role="button" href="/test_admin/admin9/admin_views/article/" '
+            'class="closelink">Close</a>',
         )
 
     def test_change_view_save_as_new(self):
@@ -4056,7 +4056,8 @@ class AdminViewStringPrimaryKeyTest(TestCase):
             args=(quote(self.pk),),
         )
         self.assertContains(
-            response, '<a href="%s" class="historylink"' % escape(expected_link)
+            response,
+            '<a role="button" href="%s" class="historylink"' % escape(expected_link),
         )
 
     def test_redirect_on_add_view_continue_button(self):
@@ -8313,13 +8314,14 @@ class AdminKeepChangeListFiltersTests(TestCase):
 
         # Check the history link.
         history_link = re.search(
-            '<a href="(.*?)" class="historylink">History</a>', response.text
+            '<a role="button" href="(.*?)" class="historylink">History</a>',
+            response.text,
         )
         self.assertURLEqual(history_link[1], self.get_history_url())
 
         # Check the delete link.
         delete_link = re.search(
-            '<a href="(.*?)" class="deletelink">Delete</a>', response.text
+            '<a role="button" href="(.*?)" class="deletelink">Delete</a>', response.text
         )
         self.assertURLEqual(delete_link[1], self.get_delete_url())
 
@@ -8359,7 +8361,7 @@ class AdminKeepChangeListFiltersTests(TestCase):
         self.client.force_login(viewuser)
         response = self.client.get(self.get_change_url())
         close_link = re.search(
-            '<a href="(.*?)" class="closelink">Close</a>', response.text
+            '<a role="button" href="(.*?)" class="closelink">Close</a>', response.text
         )
         close_link = close_link[1].replace("&amp;", "&")
         self.assertURLEqual(close_link, self.get_changelist_url())
diff --git a/tests/auth_tests/test_forms.py b/tests/auth_tests/test_forms.py
index 4740cb6200..0f8b48286a 100644
--- a/tests/auth_tests/test_forms.py
+++ b/tests/auth_tests/test_forms.py
@@ -1089,7 +1089,9 @@ class UserChangeFormTest(TestDataMixin, TestCase):
                 "Set password",
             ),
         ]
-        password_reset_link = r'<a class="button" href="([^"]*)">([^<]*)</a>'
+        password_reset_link = (
+            r'<a role="button" class="button" href="([^"]*)">([^<]*)</a>'
+        )
         for username, expected_help_text, expected_button_label in cases:
             with self.subTest(username=username):
                 user = User.objects.get(username=username)
@@ -1438,7 +1440,8 @@ class ReadOnlyPasswordHashTest(SimpleTestCase):
             "    <strong>hash</strong>: "
             "       <bdi>WmCkn9**************************************</bdi>"
             "  </p>"
-            '  <p><a class="button" href="../password/">Reset password</a></p>'
+            '  <p><a role="button" class="button" href="../password/">'
+            "Reset password</a></p>"
             "</div>",
         )
 
diff --git a/tests/auth_tests/test_views.py b/tests/auth_tests/test_views.py
index 1583f8ffd7..156520ebf7 100644
--- a/tests/auth_tests/test_views.py
+++ b/tests/auth_tests/test_views.py
@@ -1532,7 +1532,7 @@ class ChangelistTests(MessagesTestMixin, AuthViewsTestCase):
         response = self.client.get(user_change_url)
         # Test the link inside password field help_text.
         rel_link = re.search(
-            r'<a class="button" href="([^"]*)">Reset password</a>',
+            r'<a role="button" class="button" href="([^"]*)">Reset password</a>',
             response.text,
         )[1]
         self.assertEqual(urljoin(user_change_url, rel_link), password_change_url)
@@ -1628,7 +1628,7 @@ class ChangelistTests(MessagesTestMixin, AuthViewsTestCase):
         response = self.client.get(user_change_url)
         # Test the link inside password field help_text.
         rel_link = re.search(
-            r'<a class="button" href="([^"]*)">Set password</a>',
+            r'<a role="button" class="button" href="([^"]*)">Set password</a>',
             response.text,
         )[1]
         self.assertEqual(urljoin(user_change_url, rel_link), password_change_url)