Oops, it doesn't look like 'friends of the besties day' is a national day..

Other days

kiss a ginger

Kiss A Ginger Day
kale

Kale Day
camera

Camera Day
one

One Day
hannah

Hannah Day
get funky

Get Funky Day
cuddle up

Cuddle Up Day
mean girls

Mean Girls Day
polyamory

Polyamory Day
tulip

Tulip Day