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

Other days

hoodie

Hoodie Day
artists

Artists Day
eat what you want

Eat What You Want Day
bonang

Bonang Day
tell a fairytale

Tell A Fairytale Day
tulip

Tulip Day
ormille

Ormille Day
lumpy rug

Lumpy Rug Day
lisp

Lisp Day
ride the wind

Ride The Wind Day