President Obama's picture taken down?

This past Presidents Day, President Obama's picture was taken off of a sign at Peterson Airforce Base.

The justification was that people complained that "the image did not fit the holiday commemorating the birthdays of past presidents George Washington and Abraham Lincoln" according to The Gazette. (a small online paper based out of Colorado)

The head of the local chapter of the NAACP thinks it was a highly racist move, and I agree. Since when did we set the definition of Presidents Day as a commemoration of the birthdays of George Washington and Abraham Lincoln?

All my life, all throughout grade school, I was under the impression that Presidents Day was a day to commemorate those who have boldly represented our great nation. A birthday never had anything to do with it.