Post Visibility Time Scheduler?

Hi,

I just installed this plugin at my site, but I realized that it’s only for widgets and not for posts.

Is there another plugin which can do this but for posts? I mean, change the visibility of a post (from password protected to private, or public to private, for example) at a scheduled time? I want to make public a post for 30 days and then make it private.

I dindn’t know where to post this, but if you can help me I’ll be very thankful 🙂

Regards.