I don 't know what, if anything, happened that day. I suspect that those are not real users, but spiders that hit the site all at once.

That's funny - I didn't know that about the Lululemon murder, but that's how I made it to DCUM from CA. Though I am from DC as well.

Any reason why this date had the highest number of users ever?
I saw it on the stats at the bottom of the page tonight and wondered. I recall the prior record was when the lululemon murder was being discussed.