Oops, it doesn't look like 'mall may close on inauguration day' is a national day..

Other days

Prescription Drug Take Back Day

Ponytail Day

Chocolate Milkshake Day

Frozen Yogurt Day

Get Funky Day

African Immigrant And Refugee Hiv And Hep Awareness Day

One Day

Carpenters Day

Boba Day

Polyamory Day