Oops, it doesn't look like 'question your existence day' is a national day..

Other days

Tell A Fairytale Day

Nae Nae Day

Donate Your Hair Day

Tell Ur Crush You Like Them Day

Lash Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Kiss A Brunette Day

Booty Pic Day

Ponytail Day

China Day