Oops, it doesn't look like 'all white g nike day' is a national day..

Other days

first love

First Love Day
boy friend

Boy Friend Day
slime

Slime Day
tulip

Tulip Day
comfy

Comfy Day
my little pony

My Little Pony Day
coffee

Coffee Day
pumpkin

Pumpkin Day
artists

Artists Day
mean girls

Mean Girls Day