Oops, it doesn't look like 'park like a jackass day' is a national day..

Other days

ruby

Ruby Day
cuddle up

Cuddle Up Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
blanket fort

Blanket Fort Day
boyfriend

Boyfriend Day
prescription drug take back

Prescription Drug Take Back Day
nae nae

Nae Nae Day
special education

Special Education Day
tell a fairytale

Tell A Fairytale Day
slime

Slime Day