I think the kernel panics I see every day at around 6:50 PM may be related to network time synchronization (I also find that my machine won’t wake up in the morning & I have to reboot it).
The last entries I see in /var/log/system.out just before the panic is always:
Dec 29 18:50:00 Mike-Cohens-G4 ntpd[322]: time reset -0.346454 s Dec 29 18:50:00 Mike-Cohens-G4 ntpd[322]: synchronisation lost
That’s also the last thing I see in the log before I reboot when I find it unable to wake up in the morning.