In APP Purchase for a few hours Only instead of a day?

Hi,
I have a question and I have found nothing on it so help me out if you can. Can you implement an In-App purchase in a game for a few hours only instead of a minimum of a day?

Also, can't a non-consumable purchase be available to a player for a few hours only and not for minimum a day?

I know how to implement Consumable, Non Consumable, Auto Renewable and Non-Renewing Subscriptions. But I cannot find anything on implementing these Purchases for a fixed number of Hours only.

All I can see is that your need to make it active for atleast a day and not for a few hours.
Can someone tell me if there is a way to do that, because I want to put up a discounted Sale on IN APP purchase for 5 hours only but I cannot find anything on it.

Thank You!