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

Other days

cuddle up

Cuddle Up Day
gum

Gum Day
bow tie

Bow Tie Day
hoodie

Hoodie Day
lash

Lash Day
stud

Stud Day
prescription drug take back

Prescription Drug Take Back Day
brow

Brow Day
healing

Healing Day
offer

Offer Day