Need cron job to delete files every month first week Saturday.

Hi experts,

Below is the my corn job Not working :-(. Its deleting file ever Saturday.

0 1 1-7 1-12 6 rm /srv/www/upload_doc/*

My requirement is Every moth first week of Saturday only the files need to be deleted. In above cron stanza what i m missing. pleas help.

Thanks,

sk.