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

Other days

boy friend

Boy Friend Day
ask out your crush

Ask Out Your Crush Day
healing

Healing Day
youth

Youth Day
brow

Brow Day
cuddle up

Cuddle Up Day
fiancee

Fiancee Day
donate your hair

Donate Your Hair Day
mean girls

Mean Girls Day
nae nae

Nae Nae Day