Oops, it doesn't look like 'i should be a girlfriend day' is a national day..

Other days

fiancee

Fiancee Day
boba

Boba Day
bow tie

Bow Tie Day
cuddle up

Cuddle Up Day
kiss a ginger

Kiss A Ginger Day
kiss a brunette

Kiss A Brunette Day
me

Me Day
get funky

Get Funky Day
kale

Kale Day
nae nae

Nae Nae Day