Oops, it doesn't look like 'name your poison name your poison day' is a national day..

Other days

boy friend

Boy Friend Day
youth

Youth Day
bubble bath

Bubble Bath Day
comfy

Comfy Day
eat what you want

Eat What You Want Day
nae nae

Nae Nae Day
azonto is acceptable

Azonto Is Acceptable Day
self appreciation

Self Appreciation Day
unicorn

Unicorn Day
kale

Kale Day