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

Other days

coffee

Coffee Day
tulip

Tulip Day
buddy

Buddy Day
self care

Self Care Day
bow tie

Bow Tie Day
camera

Camera Day
kale

Kale Day
brow

Brow Day
kiss a ginger

Kiss A Ginger Day
frozen yogurt

Frozen Yogurt Day