User blog comment:Berckley/Stark Expo dates/@comment-24118271-20170702213542

Also if you look at top-right corner in this photo you'll see 6.01, which seems to be the current date. It makes Battle at Stark Expo on June 1 instead of May 31.

Also it says Mon. which can be taken in two ways. If we're following the idea that Iron Man happens in 2011 it may be short for Month. But literally I think it was meant as 2009, because June 1 2009 is monday (and also is 6 months after november 2008)