diff --git a/admin/roles/classes/define_role_table_advanced.php b/admin/roles/classes/define_role_table_advanced.php
index 265119fafd9..f4ab5625bb7 100644
--- a/admin/roles/classes/define_role_table_advanced.php
+++ b/admin/roles/classes/define_role_table_advanced.php
@@ -652,7 +652,7 @@ class core_role_define_role_table_advanced extends core_role_capability_table_wi
             echo "</label>\n";
         }
         if ($helpicon) {
-            echo '<span class="pull-xs-right text-nowrap">'.$helpicon.'</span>';
+            echo '<span class="float-sm-right text-nowrap">'.$helpicon.'</span>';
         }
         echo '</div>';
         if (isset($this->errors[$name])) {
diff --git a/blog/rsslib.php b/blog/rsslib.php
index d671d1b52f9..37d1968e702 100644
--- a/blog/rsslib.php
+++ b/blog/rsslib.php
@@ -83,7 +83,7 @@ function blog_rss_print_link($context, $filtertype, $filterselect = 0, $tagid =
 
     $url = blog_rss_get_url($context->id, $userid, $filtertype, $filterselect, $tagid);
     $rsspix = $OUTPUT->pix_icon('i/rss', get_string('rss'), 'core', array('title' => $tooltiptext));
-    print '<div class="pull-xs-right"><a href="'. $url .'">' . $rsspix . '</a></div>';
+    print '<div class="float-sm-right"><a href="'. $url .'">' . $rsspix . '</a></div>';
 }
 
 /**
diff --git a/calendar/renderer.php b/calendar/renderer.php
index 2f2242baa0d..a078c02bebb 100644
--- a/calendar/renderer.php
+++ b/calendar/renderer.php
@@ -161,7 +161,7 @@ class core_calendar_renderer extends plugin_renderer_base {
                 $deletelink = null;
             }
 
-            $commands  = html_writer::start_tag('div', array('class' => 'commands pull-xs-right'));
+            $commands  = html_writer::start_tag('div', array('class' => 'commands float-sm-right'));
             $commands .= html_writer::start_tag('a', array('href' => $editlink));
             $str = get_string('tt_editevent', 'calendar');
             $commands .= $this->output->pix_icon('t/edit', $str);
@@ -205,9 +205,9 @@ class core_calendar_renderer extends plugin_renderer_base {
             $output .= html_writer::tag('div', $event->courselink);
         }
         if (!empty($event->time)) {
-            $output .= html_writer::tag('span', $event->time, array('class' => 'date pull-xs-right mr-1'));
+            $output .= html_writer::tag('span', $event->time, array('class' => 'date float-sm-right mr-1'));
         } else {
-            $attrs = array('class' => 'date pull-xs-right mr-1');
+            $attrs = array('class' => 'date float-sm-right mr-1');
             $output .= html_writer::tag('span', calendar_time_representation($event->timestart), $attrs);
         }
 
diff --git a/theme/boost/scss/moodle/modules.scss b/theme/boost/scss/moodle/modules.scss
index e0e162e199a..24746220cb6 100644
--- a/theme/boost/scss/moodle/modules.scss
+++ b/theme/boost/scss/moodle/modules.scss
@@ -547,10 +547,6 @@ $popout-header-height: 4rem;
     margin: 0;
 }
 
-.path-mod-assign [data-region="grade-panel"] .fitem > .col-md-3 > .pull-xs-right {
-    float: none !important; /* stylelint-disable-line declaration-no-important */
-}
-
 .path-mod-assign [data-region="grade-panel"] .mform .fitem.has-popout .felement {
     width: 100%;
 }
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index fd1c6ba94c4..4e8c4d3ac45 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -16339,10 +16339,6 @@ div#dock {
 .path-mod-assign [data-region="grade-panel"] .fitem.row {
   margin: 0; }
 
-.path-mod-assign [data-region="grade-panel"] .fitem > .col-md-3 > .pull-xs-right {
-  float: none !important;
-  /* stylelint-disable-line declaration-no-important */ }
-
 .path-mod-assign [data-region="grade-panel"] .mform .fitem.has-popout .felement {
   width: 100%; }
 
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index b061746c132..f3c92abad48 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -16611,10 +16611,6 @@ div#dock {
 .path-mod-assign [data-region="grade-panel"] .fitem.row {
   margin: 0; }
 
-.path-mod-assign [data-region="grade-panel"] .fitem > .col-md-3 > .pull-xs-right {
-  float: none !important;
-  /* stylelint-disable-line declaration-no-important */ }
-
 .path-mod-assign [data-region="grade-panel"] .mform .fitem.has-popout .felement {
   width: 100%; }
 
diff --git a/user/index.php b/user/index.php
index 304d13ad348..6821dd4de77 100644
--- a/user/index.php
+++ b/user/index.php
@@ -367,9 +367,8 @@ echo '</div>';
 
 if ($newcourse == 1) {
     $str = get_string('proceedtocourse', 'enrol');
-    // Floated left so it goes under the enrol users button on mobile.
     // The margin is to make it line up with the enrol users button when they are both on the same line.
-    $classes = 'my-1 pull-xs-left';
+    $classes = 'my-1';
     $url = course_get_url($course);
     echo $OUTPUT->single_button($url, $str, 'GET', array('class' => $classes));
 }