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

Other days

lash

Lash Day

Me Day

boba

Boba Day

self appreciation

Self Appreciation Day

one

One Day

ride the wind

Ride The Wind Day

stud

Stud Day

artists

Artists Day

kiss a brunette

Kiss A Brunette Day

youth

Youth Day