Oops, it doesn't look like 'phish and chip day' is a national day..

Other days

hoodie

Hoodie Day
boy friend

Boy Friend Day
cursing

Cursing Day
fiancee

Fiancee Day
singles

Singles Day
polyamory

Polyamory Day
self care

Self Care Day
china

China Day
bounce

Bounce Day
blanket fort

Blanket Fort Day