Oops, it doesn't look like 'choco shake day' is a national day..

Other days

cursing

Cursing Day
nae nae

Nae Nae Day
boyfriend

Boyfriend Day
donate your hair

Donate Your Hair Day
ruby

Ruby Day
bow tie

Bow Tie Day
lisp

Lisp Day
singles

Singles Day
gallery

Gallery Day
blanket fort

Blanket Fort Day