Oops, it doesn't look like 'i hate my life day' is a national day..

Other days

kiss a ginger

Kiss A Ginger Day
youth

Youth Day
stress awareness

Stress Awareness Day
kiss a brunette

Kiss A Brunette Day
camera

Camera Day
gallery

Gallery Day
law

Law Day
martini

Martini Day
one

One Day
slime

Slime Day