I used the keywords "Presidents Day" to search iStockphoto.com for images. Not a lot of results, mainly pictures of the White House, the Lincoln Memorial, Mount Rushmore, etc. But among them were these gems: patriotic cats.
First, a very sincere, serious gray Uncle Sam Cat.
Or if you prefer a fluffier, more owlish and perturbed-looking cat...there's this.
Or some patriotic kittens!