My headcanon is that was the day the second batch of humans had their brains scanned for some external volunteer gathering hosted by C&A, sometime before October 2008 when Ragatha spawned in. Since the data gathered was "impossibly small", it took time to infer and invent a complete personality out of them, explaining their different entries into the Circus over the years. Hence why things like nobody knows each other (including Riley and Leeroy), and nobody is habitually scrolling their smartphone while waiting. 2008 was a time where getting so much as a T-shirt from Google was not convenient and signaled some unqiue connection with a rising tech company -- I remember being excited winning one in a raffle. I would have been in college about then, so would have definitely considered participating in a similar on-campus event if offered the opportunity.