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

Other days

pumpkin

Pumpkin Day
coffee

Coffee Day
gum

Gum Day
nae nae

Nae Nae Day
self care

Self Care Day
my little pony

My Little Pony Day
me

Me Day
bounce

Bounce Day
brow

Brow Day
ruby

Ruby Day