So we went home and I looked it up. According to Wikipedia:
National Dance Day was created by Nigel Lythgoe, executive producer and judge for the SO YOU THINK YOU CAN DANCE television series. Congresswoman Eleanor Holmes Norton, a long-time proponent of healthy lifestyles, introduced a National Dance Day resolution to promote dance education and physical fitness across the U.S.
National Dance Day is an annual event and "grassroots initiative to encourage the nation, young and old, to move!" in the United States. This event occurs annually on the last Saturday of July. The first National Dance Day occurred on July 31, 2010, and the second annual event occurred on July 30, 2011.
The third annual National Dance Day will take place on July 28, 2012. The Dizzy Feet Foundation has comissioned two routines for this year, including a Hip-Hop Masterclass and, for the first time, a Zumba routine.
In association with the National Dance Day, a number of local dance celebrations have sprung up around the country such as Philadelphia Dance Day.
So...yes, I guess it really exists.
Not to be confused with International (or World) Dance Day, which is April 29.
In high school I would go to dances and never have enough nerve to dance. People who only know me now might find it hard to believe that I was shy but it's true. When I went to college, however, I saw far fewer "good" dancers, and I thought, "F' it. I'm not as bad as some of these guys!" and I have never looked back.
Here are some of my favorite dancers. Let's Dance!
(America's Best Dance Crew compilation)