Drupal → Собственный condition для Rules

/**
 * Implements hook_rules_condition_info().
 */
function MODULENAME_rules_condition_info() {
  return array(
    'MODULENAME_node_created_on_weekend' => array(
      'label' => t('Node created on weekend'),
      'parameter' => array(
        'node' => array(
          'label' => t('Node'),
          'type' => 'node'
        ),
      ),
      'group' => t('Node'),
    ),
  );
}
 
/**
 * Condition callback.
 */
function MODULENAME_node_created_on_weekend($node) {
  return in_array(date('N', $node->created), array(6, 7));
}