Copy and enable Cron from 10.4.
Schedule Cron jobs using crontab at the command line. Use Ctrl+D to exit crontab once all your jobs are created.
Restart the AppleTV at 8:10am every morning (say, to re-establish network connections with computers that were off during the night):
10 8 * * * sudo /sbin/reboot
Shutdown the AppleTV at 1:00am every morning:
0 1 * * * sudo /sbin/shutdown -h now
You’ll need to enable the frontrow account to use sudo without a password.