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

Other days

brow

Brow Day
lost sock memorial

Lost Sock Memorial Day
pick me

Pick Me Day
prosecco

Prosecco Day
singles

Singles Day
bounce

Bounce Day
gum

Gum Day
camera

Camera Day
eat what you want

Eat What You Want Day
bow tie

Bow Tie Day