Magento: Update footer copyright year

PHP script (/root/scripts/update_copyright_year.php)

#!/usr/bin/php
<?php
require '/var/www/app/Mage.php';
Mage::app(0);
  
# update configuration
$config = new Mage_Core_Model_Config();
$config->saveConfig('design/footer/copyright', '&copy; ' . date("Y") . ' YOUR COMPANY INC.', 'default', 0);

# refresh cache
Mage::app()->getCacheInstance()->cleanType('config');
sleep(1);
Mage::app()->getCacheInstance()->cleanType('block_html');
?>

Cronjob (/etc/cron.d/newyear)
0 0 1 1 * root /root/scripts/update_copyright_year.php

Use in CMS block
{{config path='design/footer/copyright'}}

Dep: Update by SQL
update core_config_data
set value = CONCAT('© ', YEAR(CURDATE()), ' YOUR COMPANY INC.')
where path = 'design/footer/copyright';

Links
http://www.panticz.de/Magento-Cache