Oops, it doesn't look like 'B Dub F day' is a national day..

Other days

boba

Boba Day
kale

Kale Day
mean girls

Mean Girls Day
carpenters

Carpenters Day
lash

Lash Day
bow tie

Bow Tie Day
cat girl

Cat Girl Day
brow

Brow Day
kiss a brunette

Kiss A Brunette Day
gum

Gum Day