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

Other days

blanket fort

Blanket Fort Day
youth

Youth Day
fiancee

Fiancee Day
singles

Singles Day
cuddle up

Cuddle Up Day
donate your hair

Donate Your Hair Day
kale

Kale Day
mean girls

Mean Girls Day
one

One Day
tell a fairytale

Tell A Fairytale Day