Oops, it doesn't look like 'hysteria in ten day' is a national day..

Other days

first love

First Love Day
cat girl

Cat Girl Day
lisp

Lisp Day
ride the wind

Ride The Wind Day
china

China Day
boba

Boba Day
pumpkin

Pumpkin Day
polyamory

Polyamory Day
pick me

Pick Me Day
kale

Kale Day