Alarm on PC

[Scramble]

If I set my alarm on my PC to go off at midnight to encourage me cinderella style to bed, will it turn on my PC if I happen (very unlikely) to go to bed before alarm goes off?

I know it is a stupid question but I don't want to come downstairs to turn it off again.

[Scramble]

Duh I can't actually find an alarm on my PC, suppose I will have to stay up all night now .