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

Other days

coffee

Coffee Day
azonto is acceptable

Azonto Is Acceptable Day
bow tie

Bow Tie Day
martini

Martini Day
ruby

Ruby Day
slime

Slime Day
china

China Day
cuddle up

Cuddle Up Day
girl friend

Girl Friend Day
lisp

Lisp Day