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

Other days

hoodie

Hoodie Day
brow

Brow Day
promposal

Promposal Day
boba

Boba Day
tell a fairytale

Tell A Fairytale Day
prosecco

Prosecco Day
bow tie

Bow Tie Day
tulip

Tulip Day
offer

Offer Day
buddy

Buddy Day