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

Other days

camera

Camera Day
lumpy rug

Lumpy Rug Day
first love

First Love Day
artists

Artists Day
law

Law Day
azonto is acceptable

Azonto Is Acceptable Day
lisp

Lisp Day
lash

Lash Day
kiss a brunette

Kiss A Brunette Day
get funky

Get Funky Day