Oops, it doesn't look like 'flag in a ceremony held in connection with the independence day' is a national day..

Other days

Tell A Fairytale Day

Frozen Yogurt Day

Girl Friend Day

Prescription Drug Take Back Day

Stress Awareness Day

Lumpy Rug Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Mean Girls Day

Aloxolt Day

Cat Girl Day