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

Other days

ruby

Ruby Day
one

One Day
bounce

Bounce Day
stud

Stud Day
self appreciation

Self Appreciation Day
book

Book Day
cuddle up

Cuddle Up Day
cursing

Cursing Day
kiss a ginger

Kiss A Ginger Day
ask out your crush

Ask Out Your Crush Day