Oops, it doesn't look like 'landmarks and spots of hugeness to observe independence day' is a national day..

Other days

Chocolate Milkshake Day

Stud Day

Fiancee Day

Lash Day

Polyamory Day

Martini Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Prescription Drug Take Back Day

Pick Me Day

Comfy Day