debian cron: How do I change when /etc/cron.daily/standard is scheduled?

["Ewing, Jeff I" <jeff.ewing@eds.com>]

Please help.

My Debian workstation is veerry slow for 30 minutes at 06:30 a.m. when I start work. 
The following command is running:
 "find / /dev/pts /var /usr /redhat ................."
This is called from :
22821 22770  0 06:50 ?        00:00:00 sh /usr/sbin/checksecurity
which is called from:
22770 21282  0 06:50 ?        00:00:00 sh /etc/cron.daily/standard
which is called from 
21282 21281  0 06:25 ?        00:00:00 run-parts --report /etc/cron.daily

How do I reschedule this maintenance to around 03:00? The 'man cron' page is not clear:

"/etc/cron.{daily,weekly,monthly} directories allow to  add a  crontab file to /etc/cron.d."

Thank you

Jeff
EDS (Australia)
Email: jeff.ewing@eds.com