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

Other days

unicorn

Unicorn Day
comfy

Comfy Day
buddy

Buddy Day
tell a fairytale

Tell A Fairytale Day
lost sock memorial

Lost Sock Memorial Day
pampering

Pampering Day
boba

Boba Day
one

One Day
bow tie

Bow Tie Day
ormille

Ormille Day