[handy]

Aha. Didn't see your post before I posted mine. I heard it too. Don't have time at the moment to do the calculations myself though.

In excel dates are converted to serial number. The serial number for 9-11-01 is 37145, and the serial number for 3-11-04 is 38057. The difference between to two is 912. This means 3-11 is the 912th day after 9-11-01 (remember 2004 is a leap year). So if you do not count 9-11-2001 OR 3-11-04 then there would be 911 days between the two dates.

[shhrubbery!]

Sounds plausible. Mathematically it would make sense to count the days between the dates, including only the first. I hate to think that terrorists think logically and mathematically, but clearly the most successful ones --in terms the degree of their devastation-- do.

Everybody's been trying to get me to learn excel but I've never gotten around to it. Thanks for the info.

[Centurion2000]

In excel dates are converted to serial number. The serial number for 9-11-01 is 37145, and the serial number for 3-11-04 is 38057. The difference between to two is 912. This means 3-11 is the 912th day after 9-11-01 (remember 2004 is a leap year). So if you do not count 9-11-2001 OR 3-11-04 then there would be 911 days between the two dates.

Do it with the times of the attacks and it is 911.72 exactly