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

Other days

slime

Slime Day
ponytail

Ponytail Day
bonang

Bonang Day
pick me

Pick Me Day
hot chocolate

Hot Chocolate Day
kiss a brunette

Kiss A Brunette Day
lisp

Lisp Day
ride the wind

Ride The Wind Day
kale

Kale Day
first love

First Love Day