How can I get my Macbook to turn off at a certain time?

[iMore Question]

I would like to set my Macbook up to turn off at 9 pm everyday. I work the third shift as a nurse and I don't want my kids to be on the computer all night. My mother, who watches them, has a hard time telling them no, so I need to be able to do this without being there.

 

[anon(5719825)]

In System Preferences, go to Energey Saver and then click on schedule.