How do I run a hobbit ext script at 1st day of every month ?

Is there a way to configure a scrip to be run at specific day of the 
moth/year ?
like cronjob or at command.

I have a metric script that need to be run at first day of each 
month.Following
example is not really what I need.

[metrics]
        ENVFILE /etc/opt/hobbitserver42/hobbitserver.cfg
        CMD $BBHOME/ext/metrics/avail.ksh
        LOGFILE $BBSERVERLOGS/avail.ksh.log
        INTERVAL 4320m
bash-3.00$


T.J. Yang

http://liveearth.msn.com