Whats the date on the pic of the damage to the Stab?
Is that a trick question ?
The datestamp on the photo (which is the same one as in the CIAIAC report) is 14th April 2011 (the date of the incident). The photo is clearly taken on the gate at JFK (STA would have been around 1245 local).
As you rightly say, the damage shown is to the horizontal stabiliser, and not the elevator.