Oops, it doesn't look like 'then topped off by a winner at the end of the day' is a national day..

Other days

Latina Equal Pay Day

Embarrass Your Best Friend Day

Ride The Wind Day

Hoodie Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Special Education Day

Ormille Day

Singles Day

Appreciate Yaself A Lil Extra Day

Slime Day