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

Other days

china

China Day
latina equal pay

Latina Equal Pay Day
pampering

Pampering Day
first love

First Love Day
unicorn

Unicorn Day
pumpkin

Pumpkin Day
gum

Gum Day
blanket fort

Blanket Fort Day
bounce

Bounce Day
slime

Slime Day