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

Other days

bounce

Bounce Day
martini

Martini Day
hot chocolate

Hot Chocolate Day
singles

Singles Day
nae nae

Nae Nae Day
blanket fort

Blanket Fort Day
pumpkin

Pumpkin Day
boy friend

Boy Friend Day
offer

Offer Day
my little pony

My Little Pony Day