Empty crontab

[Marko Randjelovic <marel@sbb.co.yu>]

I see tasks from directories /etc/cron.* are ran regulary, but when I 
run "crontab -e" as root, the file is empty. Where are these tasks 
schedualed? I am asking because I want to know at what time of the day 
are tasks from cron.daily ran  and how to change it.

Thanks.