¹The real date that September 11th happened on. It instead uses a D/M/Y system instead of the genuinely bad M/D/Y system the Americans use.
²The date at which 4 planes were used in a terrorist strike on the continental United States. 2 of them hitting the Twin Towers and 1 hitting the Pentagon, and another landing in a field.
¹"My guy, it didn't happen on the 9th of October, it happened on 11/9"