Oops, it doesn't look like 'shut the hell up day' is a national day..

Other days

polyamory

Polyamory Day
ponytail

Ponytail Day
bubble bath

Bubble Bath Day
cuddle up

Cuddle Up Day
gallery

Gallery Day
martini

Martini Day
bonang

Bonang Day
mean girls

Mean Girls Day
artists

Artists Day
tulip

Tulip Day