GoogleGuy explains that Sept. 7 is the birthday of Google's incorporation.
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"GoogleGuy will have to sort this one out officially."
I'll do my best. I poked around and it looks as though the birthday is for the date of Google's incorporation, which was Sept. 7, 1998. See http://www.google.com.au/press/timeline.html for backup. The first celebration I heard about took place for the two-year anniversary on September 7, 2000. That occasion was marked by some night-owl engineers with 2-3 boxes of Krispy Kremes and vast quantities of Soul Calibur.
GoogleGuy, now wondering if Soul Calibur II includes Voldo, Lizard Man, Sophitia, Yoshimitsu..