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

Other days

gum

Gum Day
cat girl

Cat Girl Day
buddy

Buddy Day
singles

Singles Day
hot chocolate

Hot Chocolate Day
bubble bath

Bubble Bath Day
nail polish

Nail Polish Day
ormille

Ormille Day
boy friend

Boy Friend Day
nae nae

Nae Nae Day