Nada, rien, zilch, nothing

Nothing Day is an "un-event" proposed in 1972 by columnist Harold Pullman Coffin and observed annually on January 16 since 1973, when it was added to Chase's Calendar of Events. It is not actually a "National Holiday," as that requires an act of Congress. Its purpose is:

to provide Americans with one National day when they can just sit without celebrating, observing or honoring anything.

It is sponsored by Coffin's National Nothing Foundation, registered in Capitola, California. 

So do your part and do nothing to celebrate. 

There's nothing to it, really.

And yes, that's what the image was about earlier.