Plugin Needed for showing posts on certain days

Greetings,
We are running a church website and we broadcast live on the internet. We would like a way to show pages relating to the various days we broadcast to show and or hide automatically. So that if someone visits on a Sunday, they see a live broadcasting page that has Sunday’s information on it.

At the moment we are doing this by hand… for example… On Sunday we change a single link ?p=19 and change it by hand to ?p=16 so that they are directed to the live broadcast page properly.

So is there a plug in that will detect what day it is on the server and change a link or a post accordingly?

I hope this makes sense.

If not ask me and I will try to make it clearer.

Thanks!