It's a date.

Why did I put "9/11" in inverted commas in my post last Thursday (and indeed in this one)? Because to me, and I would imagine to most of you, 9/11 as a date means the 9th of November. This American style of putting the month before the day has always struck me as slightly strange and illogical. It's rather ironic that our own terrorist atrocity took place on July 7th, so it's 7/7 whichever way you look at it.