Seems appropriate to point out that the dates for this year have as much scope for binaryness as for last year.
Today is 1/1/11 or 01/01/11 if you like.
In ten days it will be 1/11/11, or 01/11/11.
And, please remind me, our 5th anniversary this year will be on 11/11/11.
I leave the other interesting dates, binaries with zero, for instance, and other numerical coincidences as an exercise for the reader.
Bonus: this year there will be a 9/10/11.