Oops, it doesn't look like 'eat my fuckin ass day' is a national day..

Other days

pampering

Pampering Day
singles

Singles Day
nae nae

Nae Nae Day
ruby

Ruby Day
one

One Day
cat girl

Cat Girl Day
blanket fort

Blanket Fort Day
gum

Gum Day
self care

Self Care Day
carpenters

Carpenters Day