I visited that site and notice this link http://www.challengemin.org/html%20pages/July2008.htm
It has to do with the BIble Students, at least the author believes it does. In reality it has to do with ONE Bible Students david Rice, (in the picture) Faithbuilders Fellowship is actually one man, David Rice. so the date is not held to by ALL Bible Students, personally I don't know anyonbe who has actually accepted it, but I understand he has either convince some that it is right or convince some that C.T. Russell's chronology is wrong.
In any event, I e-mailed David Rice and this is what he said:
Dear Bro. Rolando -- Thank you for the notification, I had no idea. I think I
may remember who that would have been, quite surprised we made enough of an
impression to merit such attention from him. I believe he was a gentleman from
the "Marantha booth" -- his reference that I was the only one there all day
suggests he was also there all day, in order to observe that, and thus an
exhibitor as well. -- Bro. David