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

Other days

youth

Youth Day
bonang

Bonang Day
kiss a ginger

Kiss A Ginger Day
lash

Lash Day
polyamory

Polyamory Day
china

China Day
law

Law Day
kiss a brunette

Kiss A Brunette Day
martini

Martini Day
aloxolt

Aloxolt Day