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

Other days

kale

Kale Day
bow tie

Bow Tie Day
mean girls

Mean Girls Day
brow

Brow Day
latina equal pay

Latina Equal Pay Day
frozen yogurt

Frozen Yogurt Day
china

China Day
nail polish

Nail Polish Day
lumpy rug

Lumpy Rug Day
polyamory

Polyamory Day