Oops, it doesn't look like 'beth cohen day' is a national day..

Other days

slime

Slime Day
bounce

Bounce Day
china

China Day
boy friend

Boy Friend Day
ponytail

Ponytail Day
donate your hair

Donate Your Hair Day
pampering

Pampering Day
self appreciation

Self Appreciation Day
comfy

Comfy Day
lisp

Lisp Day