Oops, it doesn't look like 'mute them folk day' is a national day..

Other days

pumpkin

Pumpkin Day
pick me

Pick Me Day
donate your hair

Donate Your Hair Day
unicorn

Unicorn Day
bubble bath

Bubble Bath Day
lisp

Lisp Day
ruby

Ruby Day
law

Law Day
boba

Boba Day
hoodie

Hoodie Day