zentao/extension/max/user/ext/lang/en/calendar.php

<?php
/**
 * The lang file of my module of ZenTaoPMS.
 *
 * @copyright   Copyright 2009-2012 禅道软件（青岛）有限公司(ZenTao Software (Qingdao) Co., Ltd. www.cnezsoft.com)
 * @license     business(商业软件)
 * @author      Yangyang Shi <shiyangyang@cnezsoft.com>
 * @package     calendar
 * @version     $Id$
 * @link        http://www.zentao.net
 */
$lang->user->calendar       = 'Calendar';
$lang->user->todocalendar   = 'Todo Calendar';
$lang->user->effortcalendar = 'Effort Calendar';