Oops, it doesn't look like 'banana cream pie banana cream pie day' is a national day..

Other days

ruby

Ruby Day
artists

Artists Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boy friend

Boy Friend Day
boyfriend

Boyfriend Day
book

Book Day
pumpkin

Pumpkin Day
hoodie

Hoodie Day
one

One Day
self care

Self Care Day