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

Other days

self care

Self Care Day
martini

Martini Day
promposal

Promposal Day
bounce

Bounce Day
donate your hair

Donate Your Hair Day
my little pony

My Little Pony Day
cat girl

Cat Girl Day
ormille

Ormille Day
lisp

Lisp Day
tulip

Tulip Day