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

Other days

lumpy rug

Lumpy Rug Day
boy friend

Boy Friend Day
buddy

Buddy Day
ponytail

Ponytail Day
ruby

Ruby Day
singles

Singles Day
martini

Martini Day
bubble bath

Bubble Bath Day
gum

Gum Day
brow

Brow Day