Oops, it doesn't look like 'girl friend grind day' is a national day..

Other days

carpenters

Carpenters Day
bow tie

Bow Tie Day
pick me

Pick Me Day
boba

Boba Day
bonang

Bonang Day
mean girls

Mean Girls Day
cat girl

Cat Girl Day
blanket fort

Blanket Fort Day
fiancee

Fiancee Day
hannah

Hannah Day