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

Other days

offer

Offer Day
blanket fort

Blanket Fort Day
slime

Slime Day
boy friend

Boy Friend Day
brow

Brow Day
polyamory

Polyamory Day
kiss a brunette

Kiss A Brunette Day
lash

Lash Day
youth

Youth Day
promposal

Promposal Day