Users are able to change their timezone from the backend settings page.

application/views/backend/settings.php

@@ -459,6 +459,11 @@
                         </select>
                     </div>
 
+                    <div class="form-group">
+                        <label for="timezone"><?= lang('timezone') ?></label>
+                        <?= render_timezone_dropdown('id="timezone" class="form-control"') ?>
+                    </div>
+
                     <button type="button" id="user-notifications" class="btn btn-default" data-toggle="button">
                         <span class="glyphicon glyphicon-envelope"></span>
                         <?= lang('receive_notifications') ?>

assets/js/backend_settings.js

@@ -116,6 +116,7 @@ window.BackendSettings = window.BackendSettings || {};
         $('#state').val(GlobalVariables.settings.user.state);
         $('#zip-code').val(GlobalVariables.settings.user.zip_code);
         $('#notes').val(GlobalVariables.settings.user.notes);
+        $('#timezone').val(GlobalVariables.settings.user.timezone);
 
         $('#username').val(GlobalVariables.settings.user.settings.username);
         $('#password, #retype-password').val('');

assets/js/backend_settings_user.js

@@ -39,6 +39,7 @@
             state: $('#state').val(),
             zip_code: $('#zip-code').val(),
             notes: $('#notes').val(),
+            timezone: $('#timezone').val(),
             settings: {
                 username: $('#username').val(),
                 notifications: $('#user-notifications').hasClass('active'),