Mine was...last month. Uneventful. Chances are a nuclear fallout will happen before it comes around again. Anyway, seeing as my birthday's numbers feel apocalyptic and reminiscent of death, I'd feel better sharing my account birthday over that.
Wow, it seems ages ago! Two laptops, a transcontinental move, 1,285 posts, 6 merits, thousands of logins, hundreds of gaming hours, and a year and some nine or so months later here I am.
Plot twist, @Gogotank is me from an alternate reality because he made his account for ShellShock Live the way I did. Also only two days after 5/20/2011 for me.
Mine is 6/12/2010 although I kind of doubt it. All I can remember is coming from Newgrounds after playing Exit Path. And I doubt I joined the day after my birthday.
Edit: After checking up, I guess I will scrap my doubts.