DEFCON 2011 Network Forensics Puzzle: Inception

Ann, afraid that someone may be watching her, decides to capture all of her home traffic. She mentions her fear to Mr. X and explains that she has been capturing her home traffic for days and will be sending the packets out for analysis later in the day. She sends her captures to the one person she knows can trust. After their discussion, Mr. X rushes to his lab, to see if he can intercept Ann's outbound message and use her capture to get more detail on her upcoming activities..
Use the packet capture in this folder to answer the following question:

1. What is the date, as it appears in the capture, of the cryptographer's speaking engagement? (hint: It isn't at Defcon)

You must answer the question in this round, in order to unlock the next round of the contest.

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