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

Other days

coffee

Coffee Day
one

One Day
girl friend

Girl Friend Day
nae nae

Nae Nae Day
youth

Youth Day
ponytail

Ponytail Day
polyamory

Polyamory Day
eat what you want

Eat What You Want Day
donate your hair

Donate Your Hair Day
book

Book Day