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

Other days

kale

Kale Day
gallery

Gallery Day
bonang

Bonang Day
buddy

Buddy Day
blanket fort

Blanket Fort Day
ruby

Ruby Day
pumpkin

Pumpkin Day
kiss a ginger

Kiss A Ginger Day
bubble bath

Bubble Bath Day
pampering

Pampering Day