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

Other days

gum

Gum Day
polyamory

Polyamory Day
kiss a brunette

Kiss A Brunette Day
lumpy rug

Lumpy Rug Day
book

Book Day
bow tie

Bow Tie Day
stud

Stud Day
bubble bath

Bubble Bath Day
ponytail

Ponytail Day
china

China Day