National Nothing Day

Per Wikipedia, National Nothing Day is a day to not celebrate.

National 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. [1] [2] [3] Its purpose is:

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

So we have a holiday to not celebrate holidays!