Oops, it doesn't look like 'Stfu day' is a national day..

Other days

polyamory

Polyamory Day
my little pony

My Little Pony Day
kale

Kale Day
self appreciation

Self Appreciation Day
bow tie

Bow Tie Day
hot chocolate

Hot Chocolate Day
self care

Self Care Day
frozen yogurt

Frozen Yogurt Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
appreciate yaself a lil extra

Appreciate Yaself A Lil Extra Day