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

Other days

one

One Day

stress awareness

Stress Awareness Day

boba

Boba Day

mean girls

Mean Girls Day

buddy

Buddy Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

Emoji Day

ponytail

Ponytail Day

kiss a brunette

Kiss A Brunette Day

donate your hair

Donate Your Hair Day