Why wasn't 9/11 made a day of remembrance instead of a day of service?

I have to disagree, we were attacked on 9/11 not on 9/12. And whether we like it or not, and to hell with political correctness, yes we were attacked by an enemy. 9/11 should be remembered as the day that Americans died at the hands of our enemies, and the sooner that we all realize it, the better off our country is going to be.