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

Other days

buddy

Buddy Day
gum

Gum Day
pick me

Pick Me Day
tell a fairytale

Tell A Fairytale Day
ruby

Ruby Day
ponytail

Ponytail Day
coffee

Coffee Day
blanket fort

Blanket Fort Day
stud

Stud Day
fiancee

Fiancee Day