Oops, it doesn't look like 'guard toured the beaches of normandy for a day' is a national day..

Other days

Book Day

Polyamory Day

Unicorn Day

Ponytail Day

Embarrass Your Best Friend Day

Hiv Awareness Day

China Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Promposal Day

Chocolate Milkshake Day