Oops, it doesn't look like 'guard from post in the middle of inauguration day' is a national day..

Other days

Chocolate Milkshake Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Gum Day

Bow Tie Day

Lisp Day

Offer Day

Carpenters Day

Tell A Fairytale Day

Lost Sock Memorial Day

Self Care Day