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

Other days

gum

Gum Day
ruby

Ruby Day
boba

Boba Day
lumpy rug

Lumpy Rug Day
self care

Self Care Day
brow

Brow Day
believe

Believe Day
first love

First Love Day
carpenters

Carpenters Day
youth

Youth Day