Federal holiday calculations

[Shari]

I found a Date/Time stack at http://www.troz.net/Rev/libraries.php 
for determining what day Easter falls on.

Does anyone know of a stack or library that calculates the day of the 
month for U.S. major holidays for any given year?

Such as thanksgiving(2011) returns the date Thanksgiving falls on in 2011

Shari
-- 
   Dogs and bears, sports and cars, and patriots t-shirts
   http://www.villagetshirts.com
  WlND0WS and MAClNT0SH shareware games
  http://www.gypsyware.com