From post New Feature: Relative Date Filtering :
I’d like to be able to do this too – in my case for special offers that have a start and finish date – my clients have to manually show and hide the offer at the specific time which is very inconvenient (e.g. “offer closes at midnight” – they have to stay up to remove the offer).
It would be great if we could control the visibility of CMS content based on a defined date and time.