Originally Posted by Cornroaster
I would imagine that it really wouldn't matter if the miles posted by then or not, just as long as the activity occurred before 12/31. After all, if you took a flight on 12/31, the miles wouldn't post for a few days either.
It takes 3-5 buissness days, that means you will get it in Jan 1 (the fastest) to Jan 3 (the slowest) assuming you apply today (December 28th). My Priority Club bonus took 5 days.