Because 11/9 just doesn't have the same ring to it.
American.
Just kidding, you can't change anything in the United States.
Its bang out of order!
Because it's a First Order approximation.
9/11 and 11/9 - darkest days in American history
A no-bell gas. Especially when the ringing noises Are-gon.
God really liked it so he put rings on it.
To cloud 9
He couldn't get a date!