Here is a list of the eleven Federal Holidays in the US:
http://en.wikipedia.org/wiki/Federal_holidays_in_the_United_States#List_of_Federal_Holidays

Of these, here are the ones that I celebrate:

* July 4th
* Thanksgiving
* Christmas
* New Year's

I don't celebrate days that honor any particular person, including George Washington (or any other presidents), MLK, or Columbus. I feel like I should celebrate Memorial Day or Veteran's Day, but I don't do anything special on those days. And I don't take off for the Inauguration.

Which holidays do you celebrate?