Randomize Content every 4 hours?

Is there a way to randomize content every 4 hours?
Meaning that everytime you visit a view, it does not update per page load with random content, but rather that the content that was shown stays for a full 4 hours and then reloads new random content after those 4 hours?

I am looking to auto post a single random article to facebook every 4 hours.
I imagine creating a view that refreshes every 4 hours can be a way to achieve this and then use the facebook module to post it on facebook using rules or something? Or is there an easier way to achieve this?

Can views generate the random article every 4 hours? How?
What do you recommend to do in order to achieve this?

Thank you.