hide cart button if there is Date Available

Sometimes retailers create a product long before the release date, or it is currently no longer available, but the date of new availability is already foreseeable. 
In this case, you can simply enter the date from which the product will be available again in the top left-hand corner of the admin as usual - but from now on, the quantity entry and shopping cart will be automatically hidden so that every customer is aware that the product cannot (yet) be delivered.