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

Other days

Appreciate Yaself A Lil Extra Day

Polyamory Day

Donate Your Hair Day

China Day

Pumpkin Day

Promposal Day

My Little Pony Day

Gum Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Chocolate Milkshake Day