Oops, it doesn't look like 'flip flop russ feingold day' is a national day..

Other days

Bow Tie Day

Carpenters Day

Tell Ur Crush You Like Them Day

Get Funky Day

Martini Day

Hot Chocolate Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Lash Day

Polyamory Day

Buddy Day