When is AI on next week??

Ok so my mom is having surgery next weds But she really wants to see the final episode and see who wins, shes watched it every week and she is pretty bummed that melinda left (me too :sigh) But we are happy Blakes there still

Anywho....we just dont know when its on next week since its usually on 2 days tuesday and wed!

So can some one please help us and tell us when its on, and hopefully u say tuesday so she doesnt get too bummed and if it is wed, imma have to tape it I guess!

You can watch the red carpet video here...
http://www.americanidol.com/finale/videos/

But....
The show is broadcast Wednesday at 8pm - assuming 7 CST? - never sure why central is always an hour earlier - can someone explain that?

I would still check your local listings to be sure though. Just go to your local Fox channel website to verify.