I would love if this feature was implemented.
As I live in an apartment complex with thin walls, my neighbors can hear my S3 at night through the walls.
Therefore, I actively try to avoid printing overnight when possible.
If there was a way to schedule a print, I could have it start printing first thing in the morning automatically before I even wake up to get ready for work, and I will be able to ensure the print is printing without issue before I leave for the day.
(Before someone suggests it- yes, I could just wake up earlier, but I'm really not a morning person and that's not changing anytime soon).
I think there are a lot of other use cases too, especially If this is implemented with a way to blackout specific hours. For example, a print farm may have scheduled electrical maintenance in which all the printers will have to be offline during a specific window. The user could blackout those hours on the printers and any job in the queue that would overlap those hours would get scheduled until after the window passes.