The hook_cronapi($op, $function = NULL) allows you to define new cronjobs
// Define custom cron functions function mymodule_cronapi($op, $function = NULL) { switch($op) { case 'list': return array( 'mymodule_cronjob_1' => 'Cron-1 Handler', 'mymodule_cronjob_2' => 'Cron-2 Handler', 'mymodule_cronjob_3' => 'Cron-3 Handler', ); case 'rule': switch($function) { case 'mymodule_cronjob_1': return '*/13 * * * *'; case 'mymodule_cronjob_2': return '0 0 1 * *'; } break; case 'execute': switch($function) { case 'mymodule_cronjob_2': mymodule_somefunction(); break; } break; case 'settings': switch ($function) { // 'mymodule_cronjob_3' disabled by default case 'mymodule_cronjob_3': return array('enabled' => FALSE); } case 'configure': switch ($function) { case 'mymodule_cronjob_3': return 'admin/configure-modules-settings/xxx'; } } } // Custom cron-function function mymodule_cronjob_1() { // Do some stuff ... } // Custom cron-function function mymodule_somefunction() { // Do some stuff ... } // Custom cron-function function mymodule_cronjob_3() { // Do some stuff ... }