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

Other days

book

Book Day
kiss a ginger

Kiss A Ginger Day
frozen yogurt

Frozen Yogurt Day
boy friend

Boy Friend Day
pick me

Pick Me Day
pumpkin

Pumpkin Day
slime

Slime Day
latina equal pay

Latina Equal Pay Day
bonang

Bonang Day
lisp

Lisp Day