If you count yourself as one of those who love to call your friends and folks at 12 in the morning to wish them a very happy birthday or anniversary or, anything for that matter, you must be open to the fact that there are better ways to express your wishes than call the concerned up right when they are in a perfect REM sleep. There is an option to make the wish not just verbally, but with flowers and gifts as well, which could cut the risk of being bad mouthed by a considerable extent.
However, the matter to consider here is the fact that, not many are comfortable to even think of the possibility of a midnight delivery. For all that you may fear, the delivery may be made by Count Dracula himself! Keeping excesses aside, at present, there are many providers who offer such services, where flowers, gifts and cakes are delivered at wee hours. Coming from dependable providers, buyers can be free from all associated worries that may creep up in the mind for all justified reasons. What really matters is to understand how the person / family at the receiving end would respond to this gesture before implementing the idea.