Oops, it doesn't look like 'act like a fucking moron day' is a national day..

Other days

artists

Artists Day
kale

Kale Day
healing

Healing Day
lash

Lash Day
boy friend

Boy Friend Day
blanket fort

Blanket Fort Day
gallery

Gallery Day
self care

Self Care Day
gum

Gum Day
cursing

Cursing Day