Oops, it doesn't look like 'suck dat dick day' is a national day..

Other days

embarrass your best friend

Embarrass Your Best Friend Day
coffee

Coffee Day
bow tie

Bow Tie Day
lost sock memorial

Lost Sock Memorial Day
stress awareness

Stress Awareness Day
martini

Martini Day
latina equal pay

Latina Equal Pay Day
girl friend

Girl Friend Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
lumpy rug

Lumpy Rug Day