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

Other days

self care

Self Care Day
mean girls

Mean Girls Day
get funky

Get Funky Day
gallery

Gallery Day
bow tie

Bow Tie Day
cat girl

Cat Girl Day
nail polish

Nail Polish Day
my little pony

My Little Pony Day
hoodie

Hoodie Day
boba

Boba Day