Oops, it doesn't look like 'Lets Be Dick day' is a national day..

Other days

ponytail

Ponytail Day
stress awareness

Stress Awareness Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
cat girl

Cat Girl Day
slime

Slime Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
artists

Artists Day
unicorn

Unicorn Day
azonto is acceptable

Azonto Is Acceptable Day
ride the wind

Ride The Wind Day