Do you recall David Daughtrey's vision of 1996, with the "UFO" and football-shaped object with a "21" in it? Could that be December 21?
(Interesting note: The football season starts wrapping up pretty heavily around December 21.)
If his vision is indeed from the Lord (which, due to the confirming sight of the child with the birth mark, very well may be), perhaps the happenings mentioned in his vision will take place on that day.
May we be found ready.