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

Other days

bounce

Bounce Day
pampering

Pampering Day
get funky

Get Funky Day
pick me

Pick Me Day
carpenters

Carpenters Day
boba

Boba Day
polyamory

Polyamory Day
bow tie

Bow Tie Day
lash

Lash Day
ride the wind

Ride The Wind Day