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

Other days

self appreciation

Self Appreciation Day
hot chocolate

Hot Chocolate Day
unicorn

Unicorn Day
pumpkin

Pumpkin Day
one

One Day
boy friend

Boy Friend Day
cat girl

Cat Girl Day
bow tie

Bow Tie Day
cuddle up

Cuddle Up Day
hannah

Hannah Day