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

Other days

stud

Stud Day
pick me

Pick Me Day
cat girl

Cat Girl Day
promposal

Promposal Day
ruby

Ruby Day
nail polish

Nail Polish Day
my little pony

My Little Pony Day
cursing

Cursing Day
girl friend

Girl Friend Day
mean girls

Mean Girls Day