Hi Rhuby...goggling 'Centennial Celebrations 2003' I turned up this, which would seem to be the major historical event of the year: The Centennial of Flight...the 100th Anniversary of the Wright Brothers' first flight in Kitty Hawk, North Carolina, in December of 1903. Here's the website:

http://www.celebrate100.org/index.cfm

And there's plenty other hits by googling what I mentioned (I also tried adding list or listng onto it). But it seems like you'll just have to skim though all the different centennial sites to see what you can use. I'll keep trying to find a one-page listing for you.