Oops, it doesn't look like 'deflate your balls day' is a national day..

Other days

Blanket Fort Day

Lisp Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Aloxolt Day

Pampering Day

Appreciate Yaself A Lil Extra Day

Ponytail Day

Brow Day

Lash Day

Prescription Drug Take Back Day