illuminate, remove Year in birthday field in cake 1.3

Hi guys,... can anyone help me please

Ho w can I illuminate (remove) Year in "birthday" field from users table? The concept is to find ONLY Month and Day (e.g. 06-21) from 1964-06-21 

I'm doing this cronjob feature to send email to friends of a user once the Birthday is reached... e.g. $this->Email->subject = ucfirst(i18n::translate('your friend'))  . ' : ' . $user['User']['firstname'] . ' ' . ucfirst(i18n::translate('celebrating birthday')); on a Social Network site. 

thanks in advance 

chris

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