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

Other days

martini

Martini Day
slime

Slime Day
kiss a ginger

Kiss A Ginger Day
frozen yogurt

Frozen Yogurt Day
bounce

Bounce Day
emoji

Emoji Day
lash

Lash Day
brow

Brow Day
blanket fort

Blanket Fort Day
ruby

Ruby Day