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

Other days

promposal

Promposal Day
pumpkin

Pumpkin Day
latina equal pay

Latina Equal Pay Day
ormille

Ormille Day
ruby

Ruby Day
bubble bath

Bubble Bath Day
prosecco

Prosecco Day
youth

Youth Day
artists

Artists Day
aloxolt

Aloxolt Day