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

Other days

boy friend

Boy Friend Day
cuddle up

Cuddle Up Day
ruby

Ruby Day
polyamory

Polyamory Day
first love

First Love Day
kiss a ginger

Kiss A Ginger Day
lisp

Lisp Day
girl friend

Girl Friend Day
stud

Stud Day
slime

Slime Day