Redirect after time / date

I have just started to use this plugin and love it so far, it is a really useful plugin. I have a feature request / suggestion which I think might make the plugin even better (if your interested in suggestions).

I am using the plugin on my site to redirect some pages after those pages have essentially expired. I could delete the page but I think in many cases there is value to keep the page / url but to redirect it to another page and it would be great if we could specify times within your plugin on the post / page so that the 301 redirect kicks in after the time / date has past.

As an example, I might create a post on my website for a sale of a program. The sale runs for x days and finishes at 9PM EST after which the discounts no longer work, what would be great is if we were able to do a 301 redirect when we create the page, but that the 301 redirect only kicks in once it is after that date and time. I might have the redirect go to a page which says sorry you missed the sale, but here are some discount codes or the homepage or whatever.

Thanks for listening and for a great plugin!