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

Other days

book

Book Day
boy friend

Boy Friend Day
comfy

Comfy Day
donate your hair

Donate Your Hair Day
offer

Offer Day
get funky

Get Funky Day
buddy

Buddy Day
lash

Lash Day
self care

Self Care Day
ask out your crush

Ask Out Your Crush Day