Oops, it doesn't look like 'hold yoongis hand day' is a national day..

Other days

gum

Gum Day
slime

Slime Day
hannah

Hannah Day
eat what you want

Eat What You Want Day
offer

Offer Day
ruby

Ruby Day
kale

Kale Day
lash

Lash Day
latina equal pay

Latina Equal Pay Day
mean girls

Mean Girls Day