At that time I'll be looking up at the moon, and you should be as well.
On Dec. 28th, 1960 the moon was in that very spot and Ansel Adams took his famous picture Moon and Half Dome.
Texas State University astronomer Donald W. Olson and his team have studied the photograph and figured out exactly when the moon will be in that spot.
You can read more about it here....
The encore occurred in 1994 as well.