Oops, it doesn't look like 'multiple jawn day' is a national day..

Other days

first love

First Love Day
ride the wind

Ride The Wind Day
self appreciation

Self Appreciation Day
prosecco

Prosecco Day
one

One Day
kale

Kale Day
nae nae

Nae Nae Day
artists

Artists Day
lisp

Lisp Day
cuddle up

Cuddle Up Day