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

Other days

buddy

Buddy Day
cuddle up

Cuddle Up Day
book

Book Day
boy friend

Boy Friend Day
donate your hair

Donate Your Hair Day
brow

Brow Day
pampering

Pampering Day
boba

Boba Day
ask out your crush

Ask Out Your Crush Day
gum

Gum Day