It's a little bit late for my only 9-11 post this year, but I just now noticed that the calendar I have on my wall indicates that September 11 is "World Trade Center Remembrance Day (US)".

As in_parentheses says:

If your loved one died in the Pentagon or the plane over PA, though, I guess you're just screwed. No remembrance for you.

Also, is "remembrance" even a word?