[cynwoody]

Is that right? have not done the math yet.

C:\>irb
irb(main):001:0> (Time.gm(2004, 3, 11, 6, 45) - Time.gm(2001, 9, 11, 12, 45)) / 86400
=> 911.75

There you have it. New York was GMT-4, and Madrid is GMT + 1. (Calculation in Ruby).

[Iberian]

Damm, it sounds good. I am still working it out on the free calculator.