What happened to the BBS on June 28, 2013?

[anon33932455]

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Q&A on Non-Moderation Matters (Mechanics, How-To, etc.)

Not really a critical question, but more of a curiosity, history-wise. I noticed that a whole lotta folks had cake days yesterday and today. June 27 and 28 and 95% of them are 2013. Many of those people are our strongest contributors, which made it more noticeable to me. Was there a batch-add or some membership conversion on June 27 and 28 2013? Or was that just an exceptionally auspicious day for new members in the history of BoingBoing?