Oops, it doesn't look like 'sunnies for sight day' is a national day..

Other days

slime

Slime Day
gum

Gum Day
bubble bath

Bubble Bath Day
lumpy rug

Lumpy Rug Day
promposal

Promposal Day
comfy

Comfy Day
blanket fort

Blanket Fort Day
bonang

Bonang Day
artists

Artists Day
bow tie

Bow Tie Day