Oops, it doesn't look like 'flag was first raised on independence day' is a national day..

Other days

African Immigrant And Refugee Hiv And Hep Awareness Day

Prosecco Day

Unicorn Day

One Day

Tell A Fairytale Day

Lumpy Rug Day

Latina Equal Pay Day

Embarrass Your Best Friend Day

Ask Out Your Crush Day

Boba Day