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

Other days

stud

Stud Day
law

Law Day
cat girl

Cat Girl Day
kiss a ginger

Kiss A Ginger Day
one

One Day
latina equal pay

Latina Equal Pay Day
ormille

Ormille Day
singles

Singles Day
buddy

Buddy Day
lisp

Lisp Day