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

Other days

kale

Kale Day
boy friend

Boy Friend Day
hoodie

Hoodie Day
bow tie

Bow Tie Day
self care

Self Care Day
first love

First Love Day
buddy

Buddy Day
unicorn

Unicorn Day
lost sock memorial

Lost Sock Memorial Day
bubble bath

Bubble Bath Day