December 12, 2012
...but we're done with dates like these for a long, long time.
Edit: Ashamed to admit that I wasn't able to use Firefox for this. Anyway, I had this clock running, took a screen shot at the right second, pasted into Paint, saved as a JPEG, uploaded, posted — all within the remaining 48 seconds so this post would happen on 12-12-2012. Just to see if I could do it. What an unimportant success!