I'm having trouble following you, but all I can tell you is that according to
Wikipedia, the first plane crash was at 8:46:30 a.m on the morning of September 11. At that time, it was 10:46:30pm on the evening of the 11th in Sydney, which is where I was. You can work out what time it was here by putting the date and time into
this site.
Most people here did not find out until they got out of bed the next morning, which was most definately the 12th. I'm surprised you didn't get a thump from your wife for missing your anniversary.