diff --git a/user/edit.html b/user/edit.html
index b1ba05d32d0..f19aa72623b 100644
--- a/user/edit.html
+++ b/user/edit.html
@@ -234,7 +234,7 @@ if (isadmin()) {
 </tr>
 -->
 <tr>
-    <th><?php print_string('timezone', 'calendar')?>:</th>
+    <th><?php print_string('timezone')?>:</th>
     <td>
     <?php
         $records = get_records_sql('SELECT id, name FROM '.$CFG->prefix.'timezone GROUP BY name');
@@ -260,7 +260,12 @@ if (isadmin()) {
                 $presets[sprintf("%.1f", $i)] = $tzstring;
             }
         }
-        choose_from_menu($presets, 'timezone', $user->timezone, get_string('serverlocaltime'), '', '99');
+        if(!empty($CFG->forcetimezone)) {
+            choose_from_menu($presets, 'timezone', $CFG->forcetimezone, get_string('serverlocaltime'), '', '99', false, true);
+        }
+        else {
+            choose_from_menu($presets, 'timezone', $user->timezone, get_string('serverlocaltime'), '', '99');
+        }
     ?>
     </td>
 </tr>
diff --git a/user/edit.php b/user/edit.php
index 2efef16a66e..bfb172cceaf 100644
--- a/user/edit.php
+++ b/user/edit.php
@@ -99,9 +99,15 @@
         $usernew->htmleditor    = clean_param($usernew->htmleditor,    PARAM_INT);
         $usernew->emailstop     = clean_param($usernew->emailstop,     PARAM_INT);
 
-        // Some replaces to prevent SQL injections
-        $usernew->timezone = str_replace(';', '',  $usernew->timezone);
-        $usernew->timezone = str_replace('\'', '', $usernew->timezone);
+        if(!empty($CFG->forcetimezone) && isset($usernew->timezone)) {
+            // Don't allow changing this in any way if a timezone is forced
+            unset($usernew->timezone);
+        }
+        else {
+            // Some replaces to prevent SQL injections
+            $usernew->timezone = str_replace(';', '',  $usernew->timezone);
+            $usernew->timezone = str_replace('\'', '', $usernew->timezone);
+        }
 
         foreach ($usernew as $key => $data) {
             $usernew->$key = addslashes(clean_text(stripslashes(trim($usernew->$key)), FORMAT_MOODLE));