In other countries it goes day/month/year....
Anyways, two passenger planes crashed into the world trade center aka the twin towers in NY on September 9, 2001. Most people wont personally remember it since it was 11 years ago.
All in all, it was a terrible event and many lost their lives. Adam, I say go ahead, just dont build it too close to spawn in case some people are offended. I dont know how they would be, but sometimes people on the internet are weird.