Cron question

[Jayson Smith]

Hi,
I have recently installed Gentoo, and before that I was using Debian.  I
don't know which Cron daemon comes standard with Debian but in Gentoo I
chose VixiCron.  Aparently, Debian's Cron daemon fired off at about 6:25
A.M. local time for daily events.  Aparently, Gentoo's fires at about 3:00
A.M. local time.  My question is this.  What determines at what time of day
Cron will fire?
Jayson.