While not wishing to denigrate the innocent victims of terrorism around the world...
The numbers that perished in the WTC attacks pale into insignificance with the numbers killed/murdered on the roads in the USA every year (42 815 in 2002: so 15 x WTC attacks the following year!)
This does not detract from the idiotic US habit of putting the month before the day - WHY WHY WHY!!
It makes so much more sense build the date sequentially. When writing financial data, do you state tens, units, hundreds? - or the other way round?
Points to ponder....